Motive power for the experimental 15.7-mg bus comes from the energy stored in a rotating flywheel which it carries. the flywheel has a mass of 1510 kg and a radius of gyration of 445 mm and is brought up to a maximum speed of 4450 rev/min. if the bus starts from rest and acquires a speed of 61 km/h at the top of a hill 110 m above the starting position, compute the reduced speed n of the flywheel. assume that 9 percent of the energy taken from the flywheel is lost. neglect the rotational energy of the wheels of the bus. the 15.7-mg mass includes the flywheel.

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.