The power station has an efficiency of 0.34(34%) the energy supplied to the power station each second is 9X 10 8 j calculate the useful energy produced each second 

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gsenviro | College Teacher | (Level 1) Educator Emeritus

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Energy supplied to the station = 9 x 10^8 J/s

Efficiency of power station = 34%

That is, only 34% of the energy input is converted to the output and rest is lost in the process.

The amount of useful energy generated = 34% of energy input

= 34% of 9 x 10^8 J/s

= 34/100  x 9 x 10^8 J/s

= 3.06 x 10^8 J/s.

Thus, the power station produces 3.06 x 10^8 J of useful energy per second. 

Hope this helps. 

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