PSCS 2121

A wave is a vibration in

• space

• time

• both

• neither

A wave having a frequency of 1000 Hz vibrates at

• less than 1000 cycles per second

• 1000 cycles per second

• more than 1000 cycles per second

In Europe, an electric razor completes 50 vibrations in 1 s. The frequency of these
vibrations are

• 50 Hz with a period of 1/50 s

• 1/50 Hz with a period of 50 s

• 50 Hz with a period of 50 s

• 1/50 Hz with a period of 1/50 s.

How many vibrations per second are associated with a 101-MHz radio wave?

• less than 101,000,000

• 101,000,000

• more than 101,000,000

The frequency of the second hand on a clock is

• 1 Hz

• 1/60 Hz

• 60 Hz.

The period of the second hand on a clock is

• 1s

• 1/60s

• 60s

• 3600s

• 12h

If you double the frequency of a vibrating object, its period

• doubles.

• is half

• is one quarter

The pendulum with the greatest frequency has the

• the shortest period

• shortest length

• both

• neither

The source of all wave motion is a

• wave patter

• harmonic object

• vibrating object

• region of variable high and low pressure

• none of the above

A wave travels an average distance of 6 m in 1 s. What is the wave's velocity?

• less than 0.2 m/s

• 
  1 m/s
  

• 
  3 m/s
  

• 6 m/s
  

• more than 6 m/s