Showing the strength of a paper towel is an example of the _ _ technique.
a. positive image
c. bandwagon
b. demonstration
d. testimonial

Name three different units of energy used to measure heat and describe what type of situations each is usually used.

A1-lb collar is attached to a spring and slides without friction along a circular rod in a vertical plane. the spring has an undeformed length of 5 in. and a constant k =25 lb/ft. knowing that the collar is released from being held at a determine, the speed of the collar and the normal force between the collar and the rod as the collar passes through b.

Two balls, each with a mass of 0.5 kg, collide on a pool table. is the law of conservation of momentum satisfied in the collision? explain why or why not