contestada

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?

Respuesta :

Answer:

So it will lift the mass by h = 17 m

Explanation:

As per energy conservation we know that

[tex]Q_1 = W + Q_2[/tex]

here we know that

[tex]Q_1 = 300 J[/tex]

[tex]Q_2 = 50 J[/tex]

now we have

[tex]W = 300 - 50 [/tex]

[tex]W = 250 J[/tex]

so work done by the engine is 250 J

now we have

[tex]W = mgh[/tex]

[tex]250 = 1.5 \times 9.81 \times h[/tex]

[tex]h = 17 m[/tex]

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