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December 21, 2014

December 21, 2014

Posted by **Anonymous** on Thursday, June 28, 2012 at 8:19am.

- physics -
**Elena**, Friday, June 29, 2012 at 11:20am9.8 kcal min = 41 030.64 J/min

41 030.64 J/min60 4 = 9847353.6 J.

Useful work

mgh = 709.81200 = 823200 J.

mgh/t=823200/460 = 3430 J/min

η =(3430/41030.64) 100% = =0.086%

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