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Answer by Nelda
Hey hold on to your hat.

Solar energy is the ONLY form of energy we have. Well not quite, there is nuclear.

But nothing on earth would function without the input of solar energy.

All green plants use solar energy to manufacture plant tissue.

So all the plants we eat (tomatoes, wheat etc) that are on our dinner plate, are there because solar energy created them.

All animals either eat plants or other animals, so solar energy is used to make beef steak and milk etc.

As far as devices that specifically turn solar energy into energy we use, there are a few devices.

There is easy heating. Water from a swimming pool can be pumped up onto a roof, then circulate through pipes that are in the sun. The water gets hot and is then added to the pool to heat the pool.

The main devices are those that turn solar energy into electricity. That electricity then can then supplement the power supplied by the power company.

There are various devices on the market. None of them is very efficient, and they are costly to make.

Therefore they are not a good option at present for private use.

The world is waiting for the invention of a more efficient device, and it must be affordable to manufacure.

As far as I know, there is no government money (from any country) going into this research.

Answer by Wolf Harper
Depends. How do you feel about heat? Solar energy gives us lots of heat, it’s by far the easiest energy to capture from the sun. Just put a panel on your roof and you are done. You can also make heat into other kinds of energy, notably electricity – you concentrate solar energy with a lens, use it to boil water and use steam pressure to run generators.

You can get electricity directly from the sun via solar panels.

Everything else is indirect. The sun heats the earth, that causes wind, we run windmills. Plants like the sun, we grow plants, we burn plants and get heat energy. We eat plants, or we feed plants to animals and eat animals… that powers us.

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Answer by Megan Watson
Yes,it will run for sometime until whole solar energy is consumed.

Answer by adaviel
No.

Perpetual motion machines can’t be built – they violate the laws of thermodynamics

Answer by Sergio__
No.

As Adaviel mentioned, perpetual motion doesn’t exist.

The way a lamp works is it converts an X amount of energy into light and heat.

Solar panels can only absorb light, not heat, so the energy that became heat is already wasted.

The light produced by the lamp is spread around the room (only lasers can focus light to a specific point) so your solar panel would only get a tiny fraction of the light produced.

Now, keep in mind that solar panels aren’t really that efficient so from that tiny amount of light received, you will only catch a fraction of the energy.

So, just think of how much energy is left to try to power up the lamp again. Not possible.

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Answer by Marcus
A device in which the current does not reach the load does not consume power. Plugging or unplugging such a device makes no difference so far as power consumption is concerned.

However, a device in standby mode has some active loads and such device consumes power unless power supply to that load is completely cut off. Eg. when a Television is switched off using the remote control, the SMPS section inside the Television is still feeding power to section housing the infrared sensor. As such, though the Cathode Ray Tube is off, the SMPS and remote sensor section is active and still consumes power unless power supply to the Television is cut off from the AC switch on the Television or the mains in the wall.

The same thing applies to a toaster also.

Again, plugging in an extension cord which has no load is same as keeping it unplugged so far as power consumption is concerned.

It is true that power is lost in long distance transmission. This fact, as you mention, could be misleading if not understood properly. Loss of power over long distance transmission implies difficulty in transporting current through metal cable, it does not mean that long cables consume power even without a load.

Transportation or transfer of current becomes less efficient with length because of the fact that resistance of metal increases with increase in length.

As such power is not consumed just by leaving a long extension cord which is in contact with AC power.

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Answer by Mike
The newer bulb have a small in rush of current and take a while to reach their maximum potential. So they will save power if they are used for a short or long period of time.

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Answer by wellaem
turn you air UP to 78, then keep the fan upstairs going to freshen that air, remember hot air rises. Having both fans is a waste

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