Question

This multiple-concept example provides a review of the concepts that play roles here. An engine has an efficiency of 63% and produces 5284 J of work. (a) Determine the input heat. (Give your answer to the nearest 10 J.)

Answer 1

Answer:

8387 J

Explanation:

work produced= 5284 J

efficiency of 63%

the efficiency η= Work done÷ heat supplied

$\eta= \frac{W}{Q_s}$

$0.63= \frac{5284}{Q_s}$

solving $Q_s= 8397 J$

therefore,  the input heat=  8387 J