Question

Тепловая машина за цикл получает от нагревателя 50 Дж и совершает полезную работу, равную 100 Дж. Чему равен КПД тепловой машины?1) 200%2) 67%3) 50%4) Такая машина невозможна

Answer 1

4)Такая машина невозможна

Answer 2

To calculate the efficiency (КПД) of a heat engine, you can use the formula:

Efficiency = (Useful work output) / (Heat input)

Given that the heat input (Q_in) is 50 J and the useful work output (W_out) is 100 J:

Efficiency = 100 J / 50 J = 2

Now, the efficiency is given as a percentage, so you need to convert the efficiency to a percentage:

Efficiency (in percentage) = 2 * 100% = 200%

So, the efficiency (КПД) of the heat engine is 200%. The correct answer is 1) 200%.