alternate source of energy-solar energy?

Question

(please give information except google information)

Answer 1

OK, if you don't want to use Google, use Wikipedia:

http://en.wikipedia.org/wiki/Solar_power

Answer 2

Alternatives to solar energy? Well, none other than nuclear and geo-thermal. All other sources of energy was created in part by the sun's solar rays.

Wind is created by differences in air pressure caused by parts of the earth's surface heating faster than other parts. Fossil fuels were created from plant and animal life which relied on the sun. Hydro-electric power relies on precipitation feeding into streams and rivers.

Answer 3

An alternate source of energy is that which can be used an alternative when we are in scarcity of our conventional sources of energy. Solar energy is the most widely being used alternate source of energy b'cos of following reasons:
a)Solar energy is the direct form of alternate energy while others like wind energy & even conventional sources of energy r its indirect effect.
b)On the whole surface of earth when solar radiations r available, they r intense enough to b utilized & used whereas wind must have a minimum speed of 15km/hr.
c)solar radiations r easily available & that also free of cost.
d)we have got quite advances in solar technique. This is low in cost & easy to use.
e)solar energy cann't b depleted by usage.
f)Solar technique is environment friendly.

Answer 4

You do understand that if we drilled interior the Gulf it may take 2 years for the end result? Or Alaska it may take 10 years? i ought to make certain the Gulf drilling. Infrastructure is there and it quite is a particularly short term investment, yet why could you pick to place 10 years and a brilliant form of money into ANWR while (with a bit of luck) oil call for right here will wane. could you pick to finally end up exporting all of our oil to china or some such? How approximately we keep ANWR oil. it may be effective to have that oil, considering militia runs on oil, some years into the destiny. it can be a astonishing guard for the destiny. people have short suggestions. regrettably they ought to experience the soreness or they gained't exchange.

Answer 5

If you're not allowed to google information for your class project, I highly doubt you'll be able to use a bunch of posts on Yahoo! Answers.

Answer 6

Do you want to know about solar energy?

All the energy in the universe is constant, neither created nor destroyed. It can change forms, however.

Solar energy starts inside the nucleus of an atom. The nucleus fuses with another atomic nucleus. However, the new mass is not the sum of the two original masses. The loss of mass is equal to the energy generated, or E=MC^2. C is a very large number, so this process (nucleur fusion) produces millions of times as much energy as ordinary combustion does.

Nucleur fusion can only occur in stars because their enromous gravity can compress Hydrogen gas to the pressure and temperature necessary to sustain fusion reactions. Our sun is 93 milion miles away from earth and the light takes about 8 minutes to strike the planet's surface. The sun also produces a lot of charged particles known as the solar wind, but they are deflected away from the earth by this planet's magnetic shield.

Sunlight generates an average power of two watts per square centimeter when it strikes the earth. Most of this energy either is reflected back into space or absorbed by the surface of the earth in the form of heat energy. Green plants transform the solar energy into chemical energy in the formation of sugars.

Humans have learned to turn solar energy into electric energy. Solar cells originally consisted of plates of copper coated with copper oxide. Photons of sunlight (solar energy particles) struck the molecules of copper oxide and excited electrons. These were passed to the copper atoms, which then passed them to other copper atoms along the electrical circuit. At the end of the circuit, the electrons were returned to the copper oxide molecules. Because the electrons travel in a straight line, the movement of electrons is known as direct current. All solar cells produce direct current. The current used by most electrical devices is alternating current. It is created by magnets and moves back and forth like tides in the ocean. To use solar cells to power electrical machinery, the DC current has to be changed to AC current. One device which uses DC current is the computer. In this device, AC current is switched back to DC current.

Computers are made of silicon chips, and modern solar cells are also composed of silicon. The silicon contains small amounts of arsenic and germanium. This causes it to behave like copper oxide when sunlight strikes it.

The two watts per square centimeter delivered by the sun is enough energy to warm a cubic centimeter of water two degrees celcius in 1 second. This is enough energy to boil a teaspoon of water in 20 minutes. However, no solar cell is more than 20% efficient, so this means 80% of the solar energy becomes heat and is wasted. This seems very inefficient, but gasoline engines can only turn 30% of their fuel into mechanical energy. Again, the rest is wasted as heat.

American oil companies capitalize on the inefficiency of solar cells by stating it would take acres and acres of them to power an average city. In fact, it would take a solar array about twenty miles square to power a major city. This belies the fact the land itself need not be inside the city, nor does it have to be one giant solar cell. The Germans are now investing heavily in solar technology and their cells are found along highways.

FYI //////////////////////////
why water in a teaspoon won't boil if it sets out in the sun:

First, the teaspoon is made of metal. besides reflecting most of the sunshine back into space, it also conducts heat more efficiently then the water does (metal heats up faster than water). It conducts the heat away from the water and back into the atmosphere. The main thing stopping the water boiling is evaporation. The water evaporates and keeps itself cool. This is why the water evaporates instead of boils.

Answer 7

What the heck is you specific question?