Question

student built a simple heat engine that could lift masses. If the heat engine takes in 300 J of heat and loses 50 J to the environment, how much height will it lift a 1.5 kg mass?

Answer 1

So it will lift the mass by h = 17 m

Step-by-step explanation:

As per energy conservation we know that

`Q_1 = W + Q_2`

here we know that

`Q_1 = 300 J`

`Q_2 = 50 J`

now we have

`W = 300 - 50`

`W = 250 J`

so work done by the engine is 250 J

now we have

`W = mgh`

`250 = 1.5 * 9.81 * h`

`h = 17 m`