Which of these statements about ionising radiation are true:
a) ionising radiation can transfer enough energy to break molecules apart.
b) theta radiation is a type of ionising radiation.
c) unstable atoms can emit three types of ionising radiation.

there may be multiple correct answers.

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.

6 cos 34, 6 sin 34 trig