A heat engine uses thermal energy that flows from a heat source with a temperature of 325k to a cold sink that has the temperature of 135k what is the efficiency of the heat engine

Efficiency = 58.5%

Explanation:

Given the following data;

Temperature of the cold sink, Tc = 135K

Temperature of the hot sink, Th = 325K

The efficiency of an engine is given by:

Efficiency = [1 - (Tc/Th)] * 100

Where;

Substituting into the equation, we have;

Efficiency = [1 - (135/325)] * 100

Efficiency = (1 - 0.4154) * 100

Efficiency = 5.85 * 100

Efficiency = 58.5%

Therefore, the efficiency of the heat engine is 58.5 percent.

a longitudinal wave moves energy that is to the direction of the wave’s movement. - true

i think the answer is a, hope this : )