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One Out Of 3 Problems For 7 Grade Solved Correctly.

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Posted by Alexander on November 19, 2001 22:29:57 UTC

Congradulation, last problem was solved correctly.

Previous one (about 70-kg athlet) is incorrect.
P(ower) = E(nergy)/t(ime) = mgh/t = 70x9.8x2/0.4 =3430 watt.

Also, newtons, as you wrote, can not be the answer - power units are watts, Newtons are the unit of force.

Still, 33% is not too bad (although may not be enough to make it to 8th grade). I expected much less. Now I see that you can not only "blah blah blah...", but do some calculations too.

I respect people with technical skills - usually they think MUCH more logically than humanitarians.

So, you should understand that universe goes by mathematical rules (which we call natural laws), thus there is no need nor room for "driver beings". As well as for illogical time travel. So, may be indeed we argue just about semantics - calling same things by different words.

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