We know that plants gather immense ammounts of energy from the sun through photosynthesis.
How does their energy absorption capacity compare to modern solar cells, and can we someday engineer algae or other simple plants to collect energy for us?
Let me clarify that I’m not talking about a process that destroys the plant. I mean photosynthesis AS a generator.
1. __________ energy comes from the natural flow of sunlight, wind, or water around the Earth.
A. Integrated
B. Non-renewable
C. Renewable
2. In the energy industry, ______ refers to wood, straw, biological waste products such as manure, and other natural materials that contain stored energy.
A. biomass
B. biology
C. bifurcation
3. Hydroelectric generation does not produce significant greenhouse gas emissions, but does have other major environmental impacts.
A. true
B. false
4. The wind has been used by humans for thousands of years, first to carry ships across oceans and, later, to pump water and grind grain.
A. FALSE
B. TRUE
5. Our large, untapped supplies of wind, sun, water, and biomass can power our society indefinitely.
A. true
B. false
6. Some energy sources are considered __________ because once they are removed from the ground and used, they are not immediately replaced.
A. non-renewable
B. renewable
C. revitalized
7. The energy of falling water is used mainly to drive ___________ at hydroelectric dams.
A. electrical generators
B. hydroponic plants
C. hydroplaning cars
8. The energy stored in biomass can be released by burning the material directly, or by feeding it to micro-organisms that use it to make _______, a form of natural gas.
A. sludge
B. biogas
C. petrol
9. ________ collectors are designed to capture some of the sun’s energy and change it from radiation into more usable forms such as heat or electricity.
A. Metabolic
B. Solar
C. Sinus
10. Fossil fuels are not limited and will become increasingly less costly.
A. true
B. false
Originally posted 2008-12-23 11:22:25.
It is recommended that moisturisers be applied just after a shower, for maximum benefit as the nutrients get sealed inside the pores and is completely absorbed.
But, is the same true about sunblocks? If the sunblock gets absorbed so much, there won’t be a layer that shields against the sun.
I’m gonna throw this idea at you. Tell me if this would work/what’s wrong with this. I think this is the Ultimate Hybrid Car.
The car’s body is made from the same material as sun roofs. This allows the car to charge it’s battery without a electrical grid.
Inside the car’s grill is a mini wind powered fan. This fan will generate electricity when the car is in motion.
The car is a Hydrogen powered so if the sun wind fan aren’t producing enough energy it falls back on the Hydrogen engine.
And thats it. What do you think? Any Ideas, Suggestions, Problems?
Blanders: The fan doesn’t Turn On the fan is basically stationary. It moves when the wind pushes the blades…. think 22 inch spinners on your tires 
Originally posted 2008-12-24 08:06:32.
Assume a wind turbine with a hub 50.0 m above the ground, a rotor diameter of 50.0 m, and a wind-power conversion efficiency of 25%. The turbine operates in an area with an average wind-power density of 500 watts/m2 at 50 m altitude. How much electrical energy (in kWh) can the wind turbine generate in a year?
Originally posted 2009-03-28 18:05:00.
where can I find the price for solar module spr 215 made by sun power? I have not seen a website with any prices.
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