# How many times the absolute temperature of the heater is greater than the absolute temperature

How many times the absolute temperature of the heater is greater than the absolute temperature of the refrigerator, if in an ideal heat engine, work is done at 450 Joules for each kilojoule of energy received from the heater.

Given:

Q1 = 1 kJ = 1000 J;

A = 450 J;

T1 / T2 -?

Decision:

formula for the efficiency of an ideal heat engine:

Efficiency = A / Q1 * 100%,

the efficiency can also be expressed in terms of temperatures:

Efficiency = (T1 – T2) / T1 * 100% = (1 – T2 / T1) * 100%;

Efficiency = 450/1000 = 0.45;

T2 / T1 = 1 – efficiency;

T2 / T1 = 1 – 0.45 = 0.55;

T1 / T2 = 1 / 0.55 = 1.8 times.

One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.