Which term describes the amount of time for one particle of the medium to make one complete vibration cycle?

period
amplitude
speed
frequency

Period

Explanation:

As we know that the time period of a given cycle means the the time to complete one revolution or one vibration

Here we know that one vibration or one oscillation means to and fro motion of an object will complete when it crosses the mean position in both the directions and comes to its initial position

In this type of to and fro motion one complete vibration is completed in one Time period and number of vibrations per second is known as frequency of the vibration

So here correct answer will be

A). Period

the independent variable, the one that is intentionally manipulated, is whether or not the car hits the barrier.

the dependent variable, the one that you measure the response in, is the distance that the washers travel.

this is poiselle's equation from fluid mechanic in physics. mech eng