Asmall piece of styrofoam packing material is dropped from a height of 1.90 m above the ground. until it reaches terminal speed, the magnitude of its acceleration is given by a = g − bv. after falling 0.400 m, the styrofoam effectively reaches terminal speed, and then takes 5.40 s more to reach the ground.(a) what is the value of the constant b? s-1(b) what is the acceleration at t = 0? m/s2 (down)(c) what is the acceleration when the speed is 0.150 m/s? m/s2 (down)

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.