Suppose an automobile has a kinetic energy of 2600 J. When it moves with nine times the speed, what will be it?


Posted March 5th, 2010 by admin 2 Comments »
automobile
DP asked:


Suppose an automobile has a kinetic energy
of 2600 J.
When it moves with nine times the speed,
what will be its kinetic energy?
Answer in units of J.

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Posted in Physics | 2 Comments »

Why do people keep insisting that electric cars are more green than other cars?


Posted February 2nd, 2009 by admin 18 Comments »
cars
Swampy_Bogtrotter asked:


They run on electricity, and that means they don’t belch out loads of fumes into the atmosphere.

But that electricity has to be generated in a power station before it can be used in the car, and nine times out of ten, you can be sure that it was generated from fossil fuels.

So surely, electric cars are still responsible for polluting the planet.
Kennilope.
That’s just about the dumbest, most poorly thought through answer I’ve ever read.

http://www.greatjewelrydesign.com/

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Posted in Other - Environment | 18 Comments »