A fish swimming in a horizontal plane has a velocity Vi= (4i+j)m/s at a point in the ocean where the position relative to a certain rock is Ri=(10i-4j)m After the fish swims with constant acceleration for 20s, its velocity is Vf=(20i-5j) m/s Then if the fish maintains this constant acceleration, where is it t=25s​

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.

friction

explanation:

they us to move forward and backwards