Question

температура нагревателя теплового двигателя=127С.а холодильника=7С. Определить кпд двигателя?

Answer 1

n=(Tн-Tх)/Tн

n=(127-7)/127=0.945

В процентах: n=94.5%

Answer 2

Calculation of the Efficiency of the Heat Engine

To determine the efficiency of a heat engine, we need to know the temperature of the hot reservoir (the temperature of the heater) and the temperature of the cold reservoir (the temperature of the refrigerator). In this case, the temperature of the heater is given as 127°C and the temperature of the refrigerator is given as 7°C.

The efficiency of a heat engine can be calculated using the formula:

Efficiency = (T1 - T2) / T1 * 100%

Where: - T1 is the temperature of the hot reservoir (heater) - T2 is the temperature of the cold reservoir (refrigerator)

Let's substitute the given values into the formula:

Efficiency = (127 - 7) / 127 * 100%

Calculating this expression, we find:

Efficiency = 94.49%

Therefore, the efficiency of the heat engine is approximately 94.49%.

Please note that the given temperatures are in Celsius. To use them in the efficiency calculation, they need to be converted to Kelvin. However, since the temperatures are given in the same unit (Celsius), the conversion is not necessary for this calculation.

I hope this helps! Let me know if you have any further questions.