How can you find the thickness of the bottom of a hollow cylinder by using vernier calliper

Write short note on the following ; collision theory, rotation angle and angular velocity, centripetal acceleration, coriolis force, and newton's law of gravitation.

Astate of matter all that has define volume and can flow is a(n)

Power can be defined as a. the distance over which work was done. b. how much work can be done in a given time. c. all the work in an given area. d. the energy required to do work.