The wave motion in which the direction of propagation of wave is same the direction of motion of particles of medium is called longitudinal wave motion.
In such type of wave motion, the wave travels in the from of compressions and rarefactions.
The region in which the density of particles is maximum is called compression.
The region in which the density of particles of medium is minimum is called rarefactions.
Mike enters a revolving door that is not moving. Mike should
push at the edge of the door where it is largest distance from the pivot point
in order to produce a torque with the least amount of force. Torque is equal to
t = force x distance.
