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  • 0 posts edited
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  • 26 votes cast
Apr
21
comment Is there a temperature drop at the rotor plane of a wind turbine?
My instinct is "yes, but an unmeasurably small amount".
Apr
17
answered If I spinned a fan in a vacuum it will keep spinning forever. Why can we not make energy out of it?
Feb
11
comment solar energy on a specific location
It would help to tell is where you are - then people might be able to suggest datasets, as somebody already has for the US.
Sep
28
awarded  Yearling
Sep
26
awarded  Good Answer
Jul
28
awarded  Enlightened
Mar
28
comment Why is the sky of the moon always dark?
I don't think anybody has ever been on the moon's surface at night. Not sure though.
Mar
28
comment Why is the sky of the moon always dark?
The OP was asleep :-) I agree that this edit makes things clearer - thanks.
Mar
27
awarded  Nice Answer
Mar
27
awarded  Yearling
Mar
27
answered Why is the sky of the moon always dark?
Jan
24
comment Can we make a “Gravity Mill” based on principle(s) of Newton's cradle?
@prgSRR we don't have perpetual motion devices. Possibly you might like to take some of those videos to skeptics.stackexchange...
May
12
answered Why are large batteries described by their power?
May
5
awarded  Critic
Jan
22
answered Coherence effect on collecting sun light by mirrors
Nov
7
awarded  Supporter
Sep
28
awarded  Teacher
Sep
28
answered Are Fresnel lenses widely used for solar electricity? If not, why not?