Which best describes longitudinal waves?
a. compressions and rarefactions make up longitudinal waves, which can only travel in matter.
b. light energy travels in longitudinal waves and can travel in either matter or empty space.
c. longitudinal waves carry sound energy and are made up of crests and troughs.

The slotted link is pinned at o, and as a result of rotation it drives the peg p along the horizontal guide. compute the magnitude of the velocity and acceleration of p along the horizontal guide. compute the magnitudes of the velocity and acceleration of p as a function of θ if θ=(3t) rad, where t is measured in seconds.

Ahorizontal wire is tied to supports at each end and vibrates in its second-overtone standing wave. the tension in the wire is 5.00 n, and the node-to-node distance in the standing wave is 6.28 cm. (a) what is the length of the wire? (b) a point at an anti- node of the standing wave on the wire travels from its maximum upward displacement to its maximum downward displacement in 8.40 ms. what is the wire's mass?

How do you tell if someone actually cares about you? and just say they do?