On a frictionless horizontal air table, puck A (with mass 0.255 kg ) is moving toward puck B (with mass 0.375 kg ), which is initially at rest. After the collision, puck A has velocity 0.119 m/s to the left, and puck B has velocity 0.652 m/s to the right. 1.) What was the speed vAi of puck A before the collision?
2.) Calculate ΔK, the change in the total kinetic energy of the system that occurs during the collision.

u=13

v=30

s/t=u+1\2at

=13+431/2

=13+265.5

=278.5

the independent variable, or the one that is intentionally manipulated is the speed.

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.

and 1and 1