Select the correct answer. a ball rolls from point a to point b. the total energy of the ball at point a isn’t the same as the sum of its potential energy and kinetic energy at point b. which statement best explains this situation? a. the rolling ball doesn’t follow the law of conservation of energy. b. some of the ball’s energy is transformed to thermal energy. c. the rolling ball loses some of its energy because of gravity. d. the ball absorbs some of its own potential energy.

that would be because of both gravity and friction. so     c

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.

a. are