Asteam engine (assume a carnot engine ) has an efficiency of 50.8%. if the waste heat has a temperature of 72.4 ◦c, what is the temperature of the boiler? answer in units of ◦c.

The temperature of the boiler is approximately 147.1 °C

Explanation:

A Carnot engine is an ideal engine that has the highest efficiency among all the engines because the second law of thermodynamics.That efficiency  is:

with the temperature of the hot reservoir (the boiler temperature) and the temperature of the cold reservoir (the steam temperature). Solving for :

h let me think

specific gravity is the density of a substance divided by the density of water. since (at standard temperature and pressure) water has a density of 1 gram/cm3, and since all of the units cancel, specific gravity is usually very close to the same value as density

so "c" is the answer

plz give brainliest