Does sound travel faster in a warm room or a cold room? Explain your answer. What will most likely happen if a sound wave moves from the air through a solid?

It will increase in frequency.
It will decrease in speed.
It will increase in speed.
It will decrease in wavelength.

Debbie places two shopping carts in a cart corral she pushes the first cart which then pushes a second cart what force is being exerted

Identify the theory that can be used to explain each phenomenon. answers diffraction: wave theory interference: wave theory reflection: both particle and wave theories refraction: both particle and wave theories

The uniform slender bar rests on a smooth horizon- tal surface when a force f is applied normal to the bar at point a. point a is observed to have an initial acceleration aa of 20 m/s2, and the bar has a corre- sponding angular acceleration of 18 rad /s2. deter- mine the distance b.