Three carnot engines operate between the following temperature limits.
a) 400 and 500 k
b) 500 and 600 k
c) 400 and 600 k
each engine extracts the same amount of energy per cycle from the high-temperature reservoir. rank the magnitudes of the work done by the engines per cycle, greatest first. (note: use only the symbols > or = , for example b> a=c.)

c>a>b

Explanation:

Given

All the engine extracts same amount of heat(Q) from High-temperature reservoir

For a) 400 and 500 K

For b)500 K and 600K

For c) 400 K and 600 K

So c will give the highest amount of work

c>a>b

answer: the exterior temperature of commercial jet planes as they leave the stratosphere and return to the ground increases steadily.

explanation:

the lower most layer of atmosphere is troposphere which extends from 0 to 12 km above the surface of the earth. the temperature initially decreases as distance is increased from the earth's surface. commercial jets fly in lower part of the stratosphere. the stratosphere extends upto 50 km. the temperature in stratosphere starts rising again due to presence of ozone which traps the uv rays.

thus, when the planes leave the stratosphere and return to the ground, the exterior temperature increases steadily.