Am 31.07.2010 16:38, schrieb Stephen:

>> According to physics, it would require 0 Jules. However, to keep the
>> object stationary against the force of gravity, the muscles in your arm
>> are having to continually expend chemical energy. But how the **** do
>> you compute how much energy that is??
>
> Analyse the system and come back with an answer. This is 3rd year high
> school mechanics.

... plus university level biochemistry, yes.

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