Advantages and disadvantages of photocells

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Advantages 1) The major advantage is that it can provide so many devices with power, including such important things as refrigerators, air conditioners, heaters, water heaters, stoves, microwaves. It provides nearly 100% of lighting. It also powers other modern conveniences: washers, dryers, radios…, TV's, CD players, and computers. Other than running some on batteries, there is no other energy source to operate most of them. 2) Electricity is clean, mostly dependable, and can be distributed from generating plants hundreds or thousands of miles away. Disadvatages 1) For the vast majority of users, there is no way to substitute for it, and no alternate supply. If there is an outage, refrigerated and frozen foods may be spoiled. Many people have alternate sources for heating, especially natural gas, but not for air conditioning or home power. Generators have limited power and require gasoline or diesel fuel, which may not always be available. 2) The generation of electricity is inherently wasteful, because the conversion of fossil fuels is not very efficient, and some power from other sources is lost or wasted in distribution (especially as waste heat). 3) Another disadvantage is that power lines, appliances, and electrical receptacles present a shock hazard if not maintained in good order, or if overloaded. (MORE)

the disadvantages are: if too much electricity it can make fire OR its to high, dirty, unsafe

some advantages are:. it is clean. very easy to move to one curcuit to the other. transmitted long distances. it is safe to use, when precautions are taken :):):):):):):):):):):):):P

There are quite a few advantages to nuclear propulsion on a submarine. 1. Operational cost - While up-front construction costs are expensive, long term maintenance and operational costs are lower given the lack of need for fuel supplies for the main engines. 2. Range - Nuclear powered boats ha…ve unlimited range between refueling stops ( 5-10 years), and are only limited by crew / maintenance requirements. By comparison, their Diesel-Electric counterparts are limited in range by the amount of fuel they can carry. 3. Tactical Speed - All modern nuclear submarines are designed to escort/scout ahead of fleets/battle groups, and as such have great sustainable speed underwater (the old Russian ALFA fast-attack was known to achieve 45 knots submerged). DE boats just don't have that capability, as it drains their batteries too quickly. Speed is also a great advantage when there's a torpedo headed toward you and you need to evade it. 4. Tactical Equipment - With increased electrical generating capacity comes increased equipment capability, and therefore overall tactical capability. Even in bigger boats, they just cram in more equipment; crew habitation comes second, though it's fairly comfortable by most shipboard standards. 5. Atmospheric Regeneration - Nuclear power allows for machines that constantly regenerate the atmosphere while submerged, generating oxygen and removing Carbon Monoxide/Carbon Dioxide/Particulates from the air. DE submarines do have regeneration capability, but it's limited, and that also limits crew size and overall tactical capability. Even so, the air does get a bit stale after a couple of months if you don't bring in fresh air. 6. Water generation - Water distillation achieved by using the steam from reactor allows for thousands of gallons of water to be made daily for crew use. 7. Civilian Emergencies - Most people don't realize it, but all nuclear powered vessels have the capability of reversing their electrical generation flow from ship to shore in the event a city or town loses its power generation in a disaster. The amount of water generated can also provide thousands of gallons of fresh, potable water to disaster survivors. There are three disadvantages to nuclear propulsion: 1. Spent fuel rods - The first is the need to deal with the used fuel. In years past, spent fuel was recycled into weapons-grade material for nuclear weapons, but since arms limitation treaties were signed, spent fuel has become a problem, particularly since environmentalists keep trying to block the opening of the Yucca Mountain Nuclear Waste disposal site. In coming years this won't be as much of a problem, as there is development proceeding on "lifetime fuel", or reactors that are fueled for the life of the submarine.. This means that they won't have to refuel every several years as they do now, but will go 30 or more years before the need arises. 2. Sinking - If a nuclear powered boat sinks from enemy action or accident, radiation can possibly enter the ocean, but this hasn't yet proven to be a problem with the several known boats that have sunk over the past 50 years. Submarine reactor vessels are constructed to withstand extreme pressures and explosion damage to avoid such problems. 3. Noise - All nuclear powered boats, as do shore reactors, use active cooling systems, which mean active machinery coolant pumps. The main engines and turbine-generators are also powered by steam generated by the reactor. The additional noise generated by the steam and machinery makes nuclear powered boats much noisier than their DE counterparts; however, advances over the past 50 years in ship silencing have reduced the underwater noise range of nuclear powered boats to rival that of DE submarines running on the battery.

"Generation" in computer talk is a step in technology. It provides a framework for the growth of the computer industry. Originally, the term generation was used to distinguish between varying hardware technologies. But nowadays, it has been extended to include both the hardware and the software, whi…ch together make up an entire computer system. The custom of referring to the computer era in terms of generations came into wide use only after 1964. There are totally five computer generations known till today. Each generation has been discussed below in detail along with their advantages and disadvantages. Although there is a certain amount of overlapping between the generations, the approximate dates shown against each are normally accepted. FIRST GENERATION (1942 - 1955) We have already discussed about some of the early computer - ENIAC, EDVAC, EDSAC, etc. These machines and other of their time were made possible by the invention of "vacuum tube", which was a fragile glass device that could control and amplify electronic signals. These vacuum tube computers are referred to as first-generation computers.. Advantages. Vacuum tubes were the only electronic components available during those days.. Vacuum tube technology made possible the advent of electronic digital computers.. These computers were the fastest calculating devices of their time. They could perform computations in milliseconds. Disadvantages. Too bulky in size.. Unreliable.. Thousands of vacuum tubes that were used emitted large amount of heat and burnt out frequently. Air conditioning required.. Prone to frequent hardware failures.. Constant maintenance required.. No portable.. Manual assembly of individual components into functioning unit required.. Commercial production was difficult and costly.. Limited commercial use.. SECOND GENERATION (1955 - 1964) The transistor, a smaller and more reliable successor to the vacuum tube, was invented in 1947. However, computers that used were not produced in quantity until over a decade later. The second generation emerged with transistors being the brain of the computer. With both the first and the second-generation computers, the basic component was a discrete or separate entity. The many thousands of individual components had to be assembled by hand into functioning circuits. The manual assembly of individual components and the cost of labor involved at this assembly stage made the commercial production of these computers difficult and costly.. Advantages. Smaller in size as compared to first generation computers.. More reliable.. Less heat generated.. These computers were able to reduce computational times from milliseconds to microseconds.. Less prone to hardware failures.. Better portability.. Wider commercial use. Disadvantages. Air-conditioning required.. Frequent maintenance required.. Manual assembly of individual components into a functioning unit was required.. Commercial production was difficult and costly.. THIRD GENERATION (1964 - 1975) Advances in electronics technology continued and the advent of "microelectronics" technology made it possible to integrate large number of circuit elements into very small (less than 5 mm square) surface of silicon known as "chips". This new technology was called "integrated circuits" (ICs). The third generation was based on IC technology and the computers that were designed with the use of integrated circuits were called third generation computers.. Advantages. Smaller in size as compared to previous generation computers.. Even more reliable than second-generation computers.. Even lower heat generated than second generation computers.. These computers were able to reduce computational times from microseconds to nanoseconds.. Maintenance cost is low because hardware failures are rare.. Easily portable.. Totally general purpose. Widely used for various commercial applications all over the world.. Less power requirement than previous generation computers.. Manual assembly of individual components into a functioning unit not required. So human labour and cost involved at assembly stage reduced drastically.. Commercial production was easier and cheaper. Disadvantages. Air-conditioning required in many cases.. Highly sophisticated technology required for the manufacture of IC chips.. FOURTH GENERATION (1975 ONWARDS) Initially, the integrated circuits contained only about ten to twenty components. This technology was named small scale integration (SSI). Latter, with the advancement in technology for manufacturing ICs, it became possible to integrate upto a hundred components on a single chip. This technology came to be known as medium scale integration (MSI). Then came the era of large scale integration (LSI) when it was possible to integrate over 30,000 components onto a single chip. Effort is still on for further miniaturization and it is expected that more than one million components will be integrated on a single chip known as very large scale integration (VLSI). A fourth generation computer, which is what we have now, has LSI chips as its brain. It is LSI technology, which has led to the development of very small but extremely powerful computers. It was the start of a social revolution. A whole computer circuit was soon available on a single ship, the size of a postage stamp. Overnight computers became incredibly compact. They became inexpensive to make and suddenly it became possible for anyone and every one to own a computer.. Advantages. Smallest in size because of high component density.. Very reliable.. Heat generated is negligible.. No air conditioning required in most cases.. Much faster in computation than previous generations.. Hardware failure is negligible and hence minimal maintenance is required.. Easily portable because of their small size.. Totally general purpose.. Minimal labour and cost involved at assembly stage.. Cheapest among all generations. Disadvantage. Highly sophisticated technology required for the manufacture of LSI chips.. FIFTH GENERATION (YET TO COME) Scientists are now at work on the fifth generation computers - a promise, but not yet a reality. They aim to bring us machines with genuine I.Q., the ability to reason logically, and with real knowledge of the world. Thus, unlike the last four generations that naturally followed its predecessor, the fifth generation will be totally different, totally novel, and totally new. In structure it will be parallel (the present ones are serial) and will be able to do multiple tasks simultaneously. In functions, it will not be algorithmic (step by step, with one step at a time). In nature, it will not do just data processing (number crunching) but knowledge processing. In inference, it will not be merely deductive, but also inductive. In application, it will behave like an expert. In programming, it will interact with humans in ordinary language (unlike BASIC, COBOL, FORTRAN, etc. which present computers need). And in architecture, it will have KIPS (Knowledge Information Processing System) rather than the present DIPS/LIPS (Data/Logic Information Processing System). The odds of coming out with a fifth generation computer are heaviest for Japan. They have already started work in this direction few years back. Japan has chosen the PROLOG (Programming in Logic) language as its operating software and plans to have the final machine talk with human beings, see and deliver pictures and hear the normal, natural language.

it is more economical than diesel power generator but like diesel it is using fossilized fuel and creates pollution in the air

ADVANTAGES :. 1. Once a dam is constructed, electricity can be produced at a constant rate. 2. If electricity is not needed, the sluice gates can be shut, stopping electricity generation. The water can be saved for use another time when electricity demand is high. 3. Dams are designed to… last many decades and so can contribute to the generation of electricity for many years / decades. 4. The lake that forms behind the dam can be used for water sports and leisure / pleasure activities. Often large dams become tourist attractions in their own right. 5. The lake's water can be used for irrigation purposes. 6. The build up of water in the lake means that energy can be stored until needed, when the water is released to produce electricity. 7. When in use, electricity produced by dam systems do not produce green house gases. They do not pollute the atmosphere. DISADVANATGES :. 1. Dams are extremely expensive to build and must be built to a very high standard. 2. The high cost of dam construction means that they must operate for many decades to become profitable. 3. The flooding of large areas of land means that the natural environment is destroyed. 4. People living in villages and towns that are in the valley to be flooded, must move out. This means that they lose their farms and businesses. In some countries, people are forcibly removed so that hydro-power schemes can go ahead. 5. The building of large dams can cause serious geological damage. For example, the building of the Hoover Dam in the USA triggered a number of earth quakes and has depressed the earth's surface at its location. 6. Although modern planning and design of dams is good, in the past old dams have been known to be breached (the dam gives under the weight of water in the lake). This has led to deaths and flooding. 7. Dams built blocking the progress of a river in one country usually means that the water supply from the same river in the following country is out of their control. This can lead to serious problems between neighbouring countries. 8. Building a large dam alters the natural water table level. For example, the building of the Aswan Dam in Egypt has altered the level of the water table. This is slowly leading to damage of many of its ancient monuments as salts and destructive minerals are deposited in the stone work from 'rising damp' caused by the changing water table level..

One of the main advantage of electric current is that it is asource of energy which is used and transformed into other forms ofenergy. Disadvantage. It can be sometimes dangerous if electricalappliances are not handled properly.

The disadvantages of the biogas generators is that it is notattractive commercially and it is not feasible to locate all thelocation. The advantages is that it provides a non-polluting and arenewable source of energy.

Advantages High energy output - long life fuel Low C0 2 production Disadvantages Dangerous quantities of radioactive waste Very expensive to build,run,maintain and disposal of waste

advantages and disadvantages of 4th generation computer. Advantages Smallest in size because of high component density. Very reliable. Heat generated is negligible. No air conditioning required in most cases. Much faster in computation than previous generations. Hardware failure is negli…gible and hence minimal maintenance is required. Easily portable because of their small size. Totally general purpose. Minimal labour and cost involved at assembly stage. Cheapest among all generations. Disadvantage Highly sophisticated technology required for the manufacture of LSI chips..

advantages 1.time saving 2.convenient 3.easy to use 4.portable disadvantages 1.use lot of electricity 2.cant be use when no electricity

It makes our living simpler and comfortable but it is also dangerous that it even takes our life if some thing wrong happens

The advantage of having an electric generator is that you don'thave to worry about spending a small fortune for gas. However itsadvantage is also its disadvantage, in the event of a power outage,there will not be any electricity to run the generator.

Coal is a fossil fuel like oil and gas. Fossil fuels are all formed out of organic matter deposited, decomposed and compressed, storing all the carbon involved under the earth's surface for millions of years. Some advantages of coal are -. Easily combustible, and burns at low temperatures, m…aking coal-fired boilers cheaper and simpler than many others. Widely and easily distributed all over the world;. Comparatively inexpensive to buy on the open market due to large reserves and easy accessibility. Good availability for much of the world (i.e. coal is found many more places than other fossil fuels). Most coal is rather simple to mine, making it by far the least expensive fossil fuel to actually obtain. Coal-powered generation scales well, making it economically possible to build a wide variety of sizes of generation plants.. A fossil-fuelled power station can be built almost anywhere, so long as you can get large quantities of fuel to it. Most coal fired power stations have dedicated rail links to supply the coal. However, the important issue as of now is whether there are more advantages than disadvantages of fossil fuels like coal! Some disadvantages of coal are:. it is Non-renewable and fast depleting;. Coal has the lowest energy density of any fossil fuel - that is, it produces the least energy per ton of fuel. It also has the lowest energy density per unit volume, meaning that the amount of energy generated per cubic meter is lower than any other fossil fuel. high coal transportation costs due to the bulk of coal (as a result of the preceding two low energy density problems), especially for countries with no coal resources and hence will require special harbours for coal import and storage.. Coal dust is an extreme explosion hazzard, so transportation and storage must take special precautions to mitigate this danger. Coal storage cost is high especially if required to have enough stock for few years to assure power production availability.. burning fossil fuels releases carbon dioxide, a powerful greenhouse gas, that had been stored in the earth for millions of years, contributing to global warming.. it leaves behind harmful by-products upon combustion (both airborne and in solid-waste form), thereby causing a lot of pollution. In particular, air polution due to burning coal is much worse than any other form of power generation, and very expensive "scrubbers" must be installed to remove a significant amount of it; even then, a non-trivial amount escapes into the air.. mining of coal leads to irreversible damage to the adjoining environment;. It will eventually run out.. It cannot be recycled.. Prices for all fossil fuels are rising, especially if the real cost of their carbon is included. Environmental Impact of Coal: An average of 170 pounds of mercury is made by one coal plant every year. When 1/70 of a teaspoon of mercury is put in to a 50-acre lake it can make the fish unsafe to eat. Coal power puts the lives of the people who dig the coal in danger, and it gives them poor lung quality. Also, it ruins the natural habitats of animals. See link below. A coal plant generates about 3,700,000 tons of carbon dioxide every year; this is one of the main causes of global warming. A single coal plant creates 10,000 tons of sulfur dioxide, which causes acid rain that damages forests, lakes, and buildings. When people dig for coal, they cut down many trees. A coal plant also creates 720 tons of carbon monoxide; which causes headaches and place additional stress on people with heart disease. See link below. A 500-megawatt coal- fired plant draws about 2.2 billion gallons of water from near by bodies of water. This is enough water to support approximately 250,000 people. Some people have said that coal power is good, because coal power is reliable and affordable. It may be reliable and affordable, but in the future the damage that coal power would cause, would be much more expressive. see link below. Coal slurry (a mix of rock and coal products left over after the mined coal has been treated for use as a fuel) is a severe environmental problem around coal mines. The slurry itself is a semi-liquid, and is generally stored in a pond or small lake near the mine exit. The slurry contains a whole host of nasty chemicals, mostly benzene relatives and derivatives, and is categorized as low-level toxic waste. Storing is a significant problem, as it has a tendency to leech into the local environment, contaminating groundwater and nearby croplands. The major problem is that the volume of coal slurry is quite high, relative to the amount of usable coal produced.

The most fundamental concepts in object-oriented programming languages are 1) abstraction, 2) encapsulation, 3) inheritance, and 4) polymorphism.. These four concepts can each take a chapter by themselves, so just very briefly in practical terms:. Abstraction is a concept that allows you to 'abstr…act' the actual manipulation of data/objects/code and synthesize it into instructions of business logic. For example, Car->Start();. Encapsulation allows you to encapsulate data and methodsinto containers to prevent them from interfering with similar data and methods of a different nature other. For example, you might have a method named Start() for your car, and a method named Start() for your stove. To prevent the namespaces from colliding, these go into containers/objects/classes as such: Car->Start(); and Oven->Start();. Inheritance is the idea of letting an object inherit properties from another object. For example, the object Lamborghini inherits all the properties and methods from the object Car.. Polymorphism is the ability of objects to dynamically adapt themselves to another container. This is the most complicated of the concepts and it's a very poor explanatory statement.. Structured programming languages aren't object-oriented - they are function-oriented, so they have none of the attributes above. Those are the key differences.

well there are different types of general purpose packages, like word processor, spreadsheet and they all have there advantages...

Charcoal has a very high burning rate. This means that it can heatup to a very high temperature. Unfortunately, when it is burnedexcessively, it produces a thick smoke that pollutes the air.

well the disadvantages of photocells are that they are. Inefficient. They don't work in the dark or in low light conditions. They are expensive to used. And it takes time to set them up and for them to start working.

Advantages - They generate free power anywhere where sunlight is available - Sturdy - No moving parts - they can be set up and left alone for a while and can be engineered to withstand the rigours of a desert or of space Disadvantages - "Inefficient". Well, OK, sunlight is free...but who …wants to walk around with a dining table sized solar panel strapped to their back so they can power their wristwatch? - They don't work in the dark or in low light conditions. - Expense - they take a long time to recoup the initial investment Of course, as time goes by and the technology is refined, some of the disadvantages may be reduced

Here are a few of the advantages: 1. We can generate cleaner energy to keep the earth clean. 2.We can generate energy more efficiently. 3.We can preserve our fossil fuels because they take millions of years for the Earth to make. Actually, none of those really occur and there is also millions of …dead birds and bats. Wind systems are based on 28 mph average speed. If the wind goes over this, they shut down, under and power is cubically reduced. At 14 mph, wind gives us 10% and at 11 mph and it shuts down again. As a result fossil fuel plants run at 100% of rated to compensate for wind variables. The expected life of a wind system is shorter then the payback time. That means they actually are expected to cost us energy. They produce less energy then the energy it takes to build one! Hardly a good thing, but they feel so good.

Biggest advantage is that wind energy is free and renewable and does not release carbon dioxide into the atmosphere. Biggest disadvantage is that the wind does not always blow.

In a photovoltaic cell, light is used to produce voltage. In a photoconductive cell, light is used to regulate the flow of current. Photocells are used in control systems, where interrupting a beam of light opens a circuit, actuating a relay that supplies power to a mechanism to bring about a desire…d operation, such as opening a door or setting off a burglar alarm. Photocells are also used in photometry and spectroscopy.

There are three most obvious pros of using natural gas as a fuel topower your generators is that it is cleaner, less expensive thanother non-renewable fuels, and is considerably efficient.. • In comparison to oil and coal, the emissions of sulfur,nitrogen, and carbon dioxide (a greenhouse gas)… are considerablylower. Hence, natural gas is one of the cleanest fossil fuels whenit burns.. • Next, another advantage of natural gas generators is thatnatural gas does not produce a pungent odor, which is fairly commonin generators powered by oil or diesel.. • Gas generators are also effective in reducing costs when usedto power homes. This is because electricity from the main utilitysource is a far more expensive alternative.. • Natural gas is also readily available in large cities since itis delivered directly through pipelines. Hence, when using naturalgas powered generators, storage of fuel becomes redundant.

Nuclear power is a cheap source of energy, and reduces the cost ofproduction for industrial processes. Nuclear energy is veryreliable as compared to hydroelectric power. On the other side,nuclear waste is carcinogenic and its disposal is very expensive.Nuclear weapons pose a security threat.

The obvious advantage is the tremendous amount of energy that can be gleaned from a relatively small amount of fuel. The obvious disadvantage is the problem of safe disposal of the radioactive waste.

The advantages of nuclear power are, first that uranium fuel can substitute for fossil fuel, and the more different types of fuel we can use, the less dependent we are on any single type, and fossil fuel dependency is a political, economic, and environmental problem. Second, the use of fossil fuel h…as become increasingly a matter of concern because it releases carbon dioxide into the atmosphere which is a major cause of global warming. Third, as compared to such things as wind mills or solar power panels, nuclear power gives us a very compact source of large quantities of electric power; it does not require as much real estate as some other power sources. Disadvantages include the very large disadvantage that in the case of accidents such as Chernobyl or Fukushima, large amounts of very dangerous radioactive material are emitted into the surrounding region, causing many cases of cancer. Nuclear power produces nuclear waste, and we still do not have reliable enough storage or recycling procedures for such waste, which if it not handled well can also become a source of radioactive pollution and hence, a source of increased cancer rates. Nuclear power plants have the potential to be used to create fissionable material for use in nuclear weapons, and nuclear proliferation is a serious global political problem. It has also been the experience of the nuclear power industry, over the past half century, that nuclear power has turned out to be quite expensive.

Pros: Nuclear Fission releases immense amounts of energy, and this energy can be used efficiently to power homes, etc... The production of nuclear energy does not release any immediate pollutants into the atmosphere. Cons: However, the radioactive waste is not something to tamper with. It is hig…hly toxic, and scientists have yet to discover produce which can be used to properly dispose of the waste (ie: detoxify it, make it...vanish?). The best we can do is store the waste in massively guarded metal crates underground for approximately 200 years before the toxicity levels decrease. Nuclear meltdowns can release extremely large volumes of radiation into the surrounding environment, which can then cause mutations in unborn babies, brain damage, severe hemorrhaging, blindness, and just about any other type of cancer including leukemia (Blood cancer).

Advantages:. Transistors photocells are small, require very little power, run cool and much more reliable.. Because of the transistors the 2nd generation computers were small, faster and reliable.. Disadvantages:. Costly and had less memory than ICs.. Require much space than ICs.

I do not really know the disadvantages but the advantages are thatwhen you are hot to get colder.

Advantages:. Highly compact portable source of energy.. Compared to most other fuel sources it is still one of the most economical -in other words the costs to produce it are relatively cheap compared to other energy sources.. Production of oil has much less impact and a smaller footprint o…n the earth surface than production of coal. Disadvantages:. Oil is a carbon based fuel and the primary way it is used is to burn it, releasing more than its weight in CO2 because of the added oxygen.. CO2 is a greenhouse gas and is expected by most scientists to be a cause of global warming.. We are running out. Estimates vary from 50 to 150 years before we run out of oil. This is impossible to predict, but most major oil companies have been failing to discover new reserves equal to the amount of oil they are producing for the last few years.. Much of the remaining oil in the world is in politically unstable areas including Africa, Middle East, Russia, and parts of Southeast Asia.. Wars get fought over oil, and wars are won with oil (WW2) so it can be a very negative influence on relations between nations.. Oil must be transported in ever increasing quantities. Pipelines are one common method but where no pipeline exists oil can become 'stranded', in other words there is no way to get it to market. The natural gas in northern Alaska is a good example of this since there is no gas pipeline the oil companies must pump natural gas back into the wells.. The other transport problem with oil is from the inherent dangers of supertankers. Oil spills do serious environmental damage that takes decades to recover from. While oil spills do occur naturally, and have over time, the effects are often catastrophic for the area affected. Oil does break down naturally from biological and chemical decay, but it takes time.. Our consumption of oil is increasing at the same time our production is falling. The world is currently consuming 83 million barrels of oil per day. We aren't producing that much.. Many oil producing areas are subject to severe weather and this can interupt production. Last year's hurricanes are an example. Production will not be restored until well into this year.. Oil does contain some cancer causing compounds, benzene is one of those.. Volatile components of oil and natural gas can contribute to smog.. Some additives put into gasoline to improve its smog fighting qualities have leaked out of underground tanks at gas stations and polluted ground water with hazardous chemicals. This type of pollution is very hard to remove.. Drilling for oil is getting more difficult and expensive because we are now drilling as deep or deeper than 20,000 feet to find new reserves.. Because of the price cyclicity in the oil industry the industry is discovering that it may soon have a serious shortage of trained workers. The average age in the industry is about 50 years old. New entrants are not coming into the field for several reasons. The oil industry is going to be challenged to keep producing at the current rate with fewer employees available.. Some oil is now being strip mined in the form of tar sands. This will be very hard to restore these areas.. Sulphur in oil ends up in refined fuels and contributes to air pollution.. Efficiency is the most notable disadvantage to using petroleum as an fuel as You don't even get 20 percent efficiency in a good combustion chamber of the vehicle thus it is a bad but current generation choice - I can't wait for Hydrogen to replace fossil fuels as the hydrogen cars are "free" to drive because the are running on "water".

Advantages. Burns more cleanly than coal and oil (less polluting). 70% less carbon dioxide compared to other fossil fuels. helps improve quality of air and water (not a pollutant). does not produce ashes after energy release. has high heating value of 24,000 Btu per pound. inexpensive c…ompared to coal. no odor until added Disadvantages. not a renewable source. finite resource trapped in the earth (unless it's produced as a bio-fuel from organic waste). inability to recover all in-place gas from a producible deposit because of unfavorable economics and lack of technology (It costs more to recover the remaining natural gas because of flow, access, etc.) Other information. 5,149.6 trillion cubic feet of natural gas reserve left (more than oil but less than coal). 23.2% of total consumption of natural gas is in the United States

Solar power is renewable and doesn't take up any of the Earth's resources. It also is completely harmless, causing no pollution directly. Using various appliances may, but actually producing the electricity does not.

If you are talking a pure advantages and disadvantages of photocells electric you are range limited; you must live where you can install a charging station; the car will be advertised as nonpolluting, but that ignores how the electricity is produced to charge the battery; the car is likely more costly, but subsidized by the government; it is… quiet, but some think this makes it more dangerous; it may be cheaper to operate but may require 10 years to realize a savings given inflated up front costs. There are various options to extend the range of the electric, but none are really good alternatives given current technology. People are not buying electric vehicles in large quantities, so likely the disadvantages outweigh the advantages for most people. It is reported that the medium family income for a Chevy Volt buyer is 5,000 annually. Hence, it certainly isn't the technology for the common person.

Advantages of electric current : This is the energy source which can be easily converted into other energies like heat, mechanical, light etc very easily. Very convenient to use and environment friendly as no pollution is caused by its use at the consumer end. Disadvantage: It can sometime prove fa…tal and its transmission lines used to carry current looks ugly

Well, the answer is quite simple. By converting to wind energy, we are relying on something that we cannot fully control just yet, and that would be the wind and generally nature a whole. if there's no wind at any given time, then we don't have power. It's not so convenient as what we have now! T…he idea is great for sailboats and remote places that need very small amounts of power. Large wind farms that you see all over the world provide very small amounts of power and covered mandated requirements for utility companies. They provide virtually no real power and fossil fuel plants run in the background and their CO2 output and fuel consumption are ignore because they are not fully engaged to the grid.

The advantage of using gasoline to generate electricity is its availability. It is easier to obtain than any other fuel. Gasoline engines are lightweight. If you have a portable generator that you would use intermittently at your house or on a camping trip and you need it to be lightweight, then gas…oline is your choice. The disadvantage of gasoline starts when the engine is used more often and in a more stationary environment. If a building is going to use locally generated power on a regular basis, then diesel fuel has far more energy for unit cost than gasoline. The heavier generator can be in a fixed position so it does not need to be a light weight gasoline engine. If you are not carrying your engine to the campground but are using one already there, then you do not need a lightweight gasoline engine. The campground has already located a source of diesel fuel or natural gas. So the lighter weight of a gasoline engine combined with intermittent operation makes it ideal for some generation of electricity.

Advantages of uranium as fuel for nuclear power reactors: 1. Uranium is an alternative to fossil fuels, especially for countries without reserves of coal, petrol, methane. 2. Uranium don't contribute to global warming. 3. Uranium don't release carbon dioxide. 4. In the future uranium c…an be extracted from the sea water. Disadvantages of uranium: 1. Uranium is a possible polluting agent of the natural environment. 2. Uranium is a toxic and radioactive chemical element. 3. Uranium release radium and radon. 4. Radioactive wastes are dangerous and need to be isolated.

Compared to coal, an advantage of using oil to generate electricity is that generators can be taken out of use and then back into use more quickly and flexibly in response to changes in electricity demand, thereby reducing fuel usage. Coal is better suited to base load generation because of the long… start-up time required, and will tend to be kept operating even when there is no demand for the electricity. However, natural gas is even more flexible than oil in this respect. A disadvantage of using oil to generate electricity is that the world's supplies of oil are limited, and electricity generation is an inappropriate use of such an adaptable fuel. Another disadvantage is that oil is a fossil fuel and its use therefore adds additional carbon dioxide to the atmosphere, contributing to the greenhouse effect and global warming.

Advantages well you can say that you are able to use house phones TV computers and anything electrical disadvantages is that you cant use anything you have to walk around with candles in the dark cause there is so electricity to power anything up

It releases less carbon dioxide then coal or oil, so it is better for the environment.. One of the biggest advantages of using natural gas is the fact that there is so much of it. The US has the 6th largest reserve of natural gas in the world..

Photon light excites electrons in photocells to the conduction level, thus generating electricity, the flow of electrons.

When the p and n are joined together they form what is called the "p-n junction." When they are joined some of the electrons from the n side of the junction move to the p side. When certain kinds of light hit the photovoltaic cell, some of the electrons move from the p side to the n side. In both ca…ses the electrons have gained energy and can pass through a circuit--this creates an electrical current..

It is currently the most expensive major energy technology. It is currently the most expensive major energy technology.

adv; no need of heating water on stove all the time so no wastageof gas

there are so many advantages and disadvantages of mobile phones. as we all know that the need is the mother of invention but people specially the youngsters are misusing it. as many of the cellphones are using for the bomb blasts in many countries,any one also can capture any unnecessary pictures an…d videos. it is also a wastage of time and money

There are several disadvantages to using coal to generate electricity. When coal is burned, it releases lots of carbon dioxide, which is a problem because the atmosphere already has too much carbon dioxide and it is causing global warming. In addition, there are impurities in coal which result in ot…her forms of air pollution, particularly sulfur dioxide which results in acid rain. Coal mining is also a dangerous activity that results in many deaths. And although there is a lot of coal, it is still not a renewable resource, and it will eventually run out, if we continue to burn it.

advantages 1 more production 2 more research/computers 3 clean water 4 lights 5 TV 6 radio 7 cars/battery 8 video games disadvantages 1 more green house gases 2 coal,gas,and natural gas is in a short supply 3 nuclear waste 4 more computerized stuff/ less social interaction 5 we are getting lazy and …this all i can think of

Advantages: You can see incredibly small particles with its intense magnifying power (up to about 20,000 times) Disadvantages: Using EM's, you cannot view objects/organisms in live color, or in a live state (shooting thousands of electrons at incredibly high speeds just doesn't agree with living s…ystems)

Firstly, there is only a limited quantity of fossil fuels on the planet, and they are only being replenished on a geological timescale, meaning over millions of years, so if unless we lose our dependence on them there will be a crisis when we run out. Second, fossil fuels consist mostly of hydroc…arbons, which, when burnt, produce carbon dioxide, which is in large quantities causing global warming.





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