A group of space explores from the Marchante Space Corp have landed on an unknown planet. In order to leave they must find the escape velocity needed to get into orbit. The mass of the planet is 1.7 x 1025 kg and has a radius of 6,965 km. Find the needed velocity to get into orbit. Give your answer in: km/s.

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.

i think the answer is a and b

i wish you luck