Question

e adds 75 000 J of energy as heat and removes 15 000 en heat. What is the engine's efficiency? J of energy as

Answer 1

The engine's efficiency is 80%.

Step-by-step explanation:

Given that,

Heat
`Q_(in)=75000\ J`

Remove heat
`Q_(out)=15000\ J`

We need to calculate the engine's efficiency

The efficiency is equal to the difference Input energy and output energy and divided by the input energy.

Using formula of efficiency

`\eta=(Q_(in)-Q_(out))/(Q_(in))`

`\eta=(75000-15000)/(75000)`

`\eta*100=80\%`

Hence, The engine's efficiency is 80%.