1 mark The pull of the engine is 5000 N. When the wagon's speed is increasing, how
large is the frictional force?
Tick the correct box.
zero
between 0 and 5000 N
5000 N
more than 5000 N
1 mark
The engine is still nullino

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.

area of focus