Question #2 Collars that emit radio waves are sometimes placed on animals to find their location.
the BEST reason for using radio waves as a method of tracking the animals?
A) Radio waves are visible.
B)
Radio waves have a high frequency.
C)
Radio waves spread in all directions.
D) Radio waves are created by the animal.

A12-g wad of sticky clay is hurled horizontally at a 100-g wooden block initially at rest on a horizontal surface. the clay sticks to the block. after impact, the block slides 7.5 m before coming to rest. if the coefficient of friction between the block and the surface is 0.65, what was the speed of the clay immediately before the impact?