Question

Чему равно кол-во теплоты, полученное тепловым двигателем от нагревателя, если он отдал холодильнику количество теплоты 400 кДж, а его КПД составляет 40%

Answer 1

КПД=(Q1-Q2)/Q1=1-(Q2/Q1)
Q1=Q2/(1-КПД)=400/0,6=666 Дж

Answer 2

Calculation of Heat Received by the Heat Engine

To calculate the amount of heat received by the heat engine from the heater, we can use the formula:

Q = Q1 / η

Where: - Q = amount of heat received by the heat engine - Q1 = amount of heat given to the refrigerator (400 kJ) - η = efficiency of the heat engine (40%)

Substituting the given values: Q = 400 kJ / 0.40

Calculation

Q = 1000 kJ

Therefore, the amount of heat received by the heat engine from the heater is 1000 kJ.

[[SOURCE #1]]