Chapter 23 Waves Test A

A unit of motion repeated over and over again is called the:

• amplitude

• cycle

• velocity

• period

A measure of the number of cycles per second is called:

• frequency

• period

• amplitude

• vibration

The amount of time required for one cycle to occur is called the:

• amplitude

• frequency

• harmonic

• period

Natural frequency is:

• what happens when two waves combine to produce one wave of lower amplitude.

• the frequency at which a system oscillates when it is disturbed.

• the rate at which vibrations are naturally damped in an oscillator.

• an oscillator whose frequency is a multiple of another wave.

If the length of a pendulum increases, the period of the pendulum:

• increases.

• decreases.

• stays the same.

• returns immediately to zero.

A pendulum makes one complete swing over and back in 2.2 seconds. Its frequency is:

• 0.45 hertz.

• 0.45 seconds.

• 2.2 hertz

• 2.2 seconds.

An insect moves its wings up and down 144 times in three seconds. The period of this movement is:

• 0.0208 seconds.

• 48 hertz.

• 48 seconds.

• 144 hertz.

When damping occurs in a moving pendulum system, it causes the:

• mass of the pendulum to decrease.

• amplitude of the pendulum to decrease.

• length of the pendulum to increase.

• period of the pendulum to decrease.

The amplitude of a pendulum is doubled. This means:

• the pendulum will swing twice as far away from the center.

• the period of the pendulum will be twice as long.

• the frequency of the pendulum will be twice as high.

• the pendulum will have twice its original mass.

Which factor listed below has the greatest effect on the period of a pendulum?

• Mass of the pendulum

• Length of the string

• Amplitude of the oscillations

• Angle of the pendulum