Physics Lab B/C

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E Edgar
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Re: Physics Lab B/C

Post by E Edgar » May 27th, 2010, 6:37 am

But energy is just power multiplied by time. The way the problem was worded, one would have to assume that the amount of time that the wind turbine was running would be constant. Therefore, if the power is 8 times as much, so is the energy.
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Re: Physics Lab B/C

Post by nejanimb » May 27th, 2010, 7:05 am

Right. I made a mistake in the way I wrote it, but I'm nearly sure the correct answer still would have been 8x. Oh well. Regardless - not a good test, imho.
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Re: Physics Lab B/C

Post by stormking » June 10th, 2010, 11:30 pm

Hey guys, I'm on Troy's team. Wow we barely won. 1713 on high and 1244 on low...
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Re: Physics Lab B/C

Post by ichaelm » June 11th, 2010, 5:52 am

Congratulations! I really hope Wind Power is similar to Physics Lab, because I have a lot of ideas for improving my design :)

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Re: Physics Lab B/C

Post by Flavorflav » June 11th, 2010, 11:42 am

E Edgar wrote:But energy is just power multiplied by time. The way the problem was worded, one would have to assume that the amount of time that the wind turbine was running would be constant. Therefore, if the power is 8 times as much, so is the energy.
Available energy would increase by the cube of velocity, since the total mass of air passing the turbine would increase with the velocity. From what you say, however, they asked for the average kinetic energy, which would be momentary and for a given parcel of air, so it would increase by the square, I believe.

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