Aheat engine operates between two reservoirs at 300k. during each cycle, it absorbs 200 calories from the high temperature reservoir. calculate:
(a) the maximum efficiency of the system
(b) the maximum works the engine can perform in each cycle

(a) Zero

The maximum efficiency (Carnot efficiency) of a heat engine is given by

where

is the low-temperature reservoir

is the high-temperature reservoir

For the heat engine in the problem, we have:

Therefore, the maximum efficiency is

(b) Zero

The efficiency of a heat engine can also be rewritten as

where

W is the work performed by the engine

is the heat absorbed from the high-temperature reservoir

In this problem, we know

Therefore, since the term cannot be equal to infinity, the numerator of the fraction must be zero as well, which means

W = 0

So the engine cannot perform any work.

it doesn't. it was imagined up in the middle ages.

laticia draws the diagram below to show earth’s magnetic field.

answer

the arrows to the right of earth should point up.