How much power is generated by a motor that can do 3,000j of work in 75s

40watts

Explanation:

Given parameters:

Work done  = 3000J

Time  = 75s

Unknown:

Power generated  = ?

Solution:

Power is the rate at which work is done;

       Power =

 Now, insert the parameters and solve;

     Power =   = 40watts

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answer: 802.3 kilo joules of energy represents 191.75 kilo calorie of energy.

explanation:

energy released during combustion of one mole methane = 802.3 kilo joules

if 1 kilo joule = 0.239006   kilo calorie

then ,802.3 kilo joule will be = 802.30.239006 kilo calorie

802.3 kilo joule = 191.75 kilo calorie

hence, the energy in kilo calorie is 191.75 kilo calorie.