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

8387 J

Step-by-step explanation:

work produced= 5284 J

efficiency of 63%

the efficiency η= Work done÷ heat supplied

`\eta= (W)/(Q_s)`

`0.63= (5284)/(Q_s)`

solving
`Q_s= 8397 J`

therefore, the input heat= 8387 J