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Sagot :
54.2 MJ of energy could be used as mechanical energy from heat engine operating between 317 c and -3 c and if the engine extracted 100 mj of energy from fuel.
What is mechanical energy ?
Mechanical energy, also known as kinetic energy or potential energy, is the energy that an object possesses when it is in motion or the energy that an object stores due to its location.
According to the given information:
T(high) = -3 °C
T (low) = 317 °C
Fuel extracted = 100 MJ
First we need to convert temperature into kelvin
T(high) = 270 K
T(low) = 590 K
Efficiency = 1 - [tex]\frac{T(high)}{T(low)}[/tex]
Efficiency = 1 - [tex]\frac{270}{590}[/tex]
Efficiency = 1 - 0.458
Efficiency = 0.542
Hence maximum useful work done = 0.542 x 100 MJ
Maximum work done or the amount of energy used as mechanical energy = 54.2 MJ
Hence the maximum amount of useful work extracted from the heat engine is 54.2 MJ
To learn more about energy click here:
https://brainly.com/question/5144470
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