PV Gap

Tyrone Said:

solar enegry?

We Answered:

Solar power is the technology of obtaining usable energy from the light of the Sun. Solar energy has been used in many traditional technologies for centuries, and has come into widespread use where other power supplies are absent, such as in remote locations and in space.

Solar cars achieve their performance by extreme lightness of weight, and very efficient aerodynamics that force compromises that would not be acceptable in a day-to-day transportation device. Any vehicle built for passenger comfort and meeting contemporary safety standards would be much less aerodynamic and much heavier, thus requiring much more power to achieve highway speeds. Therefore, with current and foreseeable technologies it is unlikely a pure solar car will become commercially available. However, solar cars are essentially electric cars with an inbuilt recharging capability, so some of the engineering knowledge and technology developed in competition solar cars may help the development of battery electric vehicles and even hybrid vehicles. The Venturi AstroLab in 2006 was hailed as the world's first commercial electro-solar hybrid car due to be released in January 2008.[3]

The question arises as to whether, if battery electric vehicles become popular, it will be worthwhile fitting them with solar cells to extend their range and allowing recharge while parked anywhere in the sun. However, with present and near-term engineering considerations, it seems that the best place for solar cells will generally be on the roofs of buildings, where they are always exposed to the sky and weight is largely irrelevant, rather than on vehicle roofs.

One practical application for solar powered vehicles is possibly golf buggies, some of which are used relatively little but spend most of their time parked in the sun.

Zachary Said:

how does solar cells of communication satellite works?

We Answered:

It has to do with the structure of the solar cell. As with many electronic devices, it's easier to cause a small amount of damage that creates a leakage path, rendering the device useless. It's more difficult to separate the layers of the device, which is what is needed to create an open circuit.

If a meteor hits the solar panel, breaking a connection, then that's an open circuit. But if the solar panel has a current surge and melts a portion of a solar cell, then the part that melted will act as a short circuit to its surroundings.

Willard Said:

Why does electricity flow through metal?

We Answered:

Electricity does not 'exist' on its own, when a wire is connected to +ve and -ve polarity, the change in the potential makes the electrons in the valence shell( of the wire )excited. It is these electrons that tries to move towards the -ve which gives rise to electricity.

Eletricity is the movement of the electrons 'of' the wire when there is a change in potential.

Comparing to a water flowing thru a pipe, the voltage is the 'pressure' in the electricity and current is the 'amount' of electricity.
For more info go to:
http://science.howstuffworks.com/electri…

Sherri Said:

Science Help - Ozone, FEV, Fuel Cell Cars?

We Answered:

1) converts H into H2O
2) Differ by either being dry/humid and cool/warm, depends on their origination place
3) Pacific ocean regulates temperature and brings in warm, humid air masses
4) % of solution is amount of solute in a solution
5) Your lungs do not really age, they continue to breath and function
6) Gasoline or fossil fuels
7) Parts per million
8) Size of any particles, usually measured with millimeters or less
9) Amount of energy you can get per volume of something
10) Solar panels collect energy from the sun and make it usable. Nuclear fusion from within the sun's core creates it's energy.

Hope this helps!