A 102 kg man climbs a 5.0-meter-high stair case at constant speed. How much work does he do?

Work done  = 4,998 J

Explanation:

Given:

Mass m = 102 kg

Height h = 5 m

Find:

Work done

Computation:

Work done  = mgh

g = gravitational acceleration = 9.8m/s²

Work done  = (102)(9.8)(5)

Work done  = 4,998 J

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.

energy can be converted from one form to another, but it cannot be created or destroyed in ordinary chemical or physical means. do not understand what you are asking but hope this