What is the car's average velocity (in m/s) in the interval between t = 0.5 s
to t = 2 s?

.

Explanation:

Consider a time period of duration . Let change in the position of an object during that period of time be denoted as . The average velocity of that object during that period would be:

.

For the toy car in this question, the time interval has a duration of . That is: . (One decimal place, two significant figures.)

On the other hand, what would be the change in the position of this toy car during that ?

Note, that from readings on the snapshot in the diagram:

Therefore, the change to the position of this toy car over that time period would be . (One decimal place, two significant figures.)

The average velocity of this car over this period of time would thus be:

. (Two significant figures.)

the results is a decrease in air temperature with an increase of altitude.

explanation:

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.