Period, Frequency, Wave Speed, and Light (Unit 10 Quiz #1)

The number of cycles that are completed per second is called the ________ and is measured in _________.

• frequency, Hertz

• wavelength, meters

• amplitude, meters

• period, seconds

The period of a pendulum is 10 s. What is its frequency?

• 10 Hz

• 1 Hz

• 0.5 Hz

• 0.1 Hz

Frieda the fly flaps her wings back and forth 100 times each second.  The period of her wings flapping is:

• 100 s
• 0.01 s
• 0.01 Hz
• 100 Hz

A tennis coach paces back and forth along the sideline 10 times in 60 seconds.  The frequency of her pacing is:

• 0.167 Hz
• 6.0 Hz
• 0.167 s
• 6.0 s

A boy notices that 45 complete waves travel past him in ninety seconds.  What is the frequency of these water waves?

• 100 m
• 1 Hz
• 0.5 Hz
• 1m/s

A tennis ball is being swung on the end of a 1.5 m (r) string and takes 1.25 seconds (T) for a complete revolution. What is the period (T) of the tennis ball?

• 1.25 s

• 0.833 s

• 1.2 s

• 0.021 s

One end of the rope is vibrated to produce a wave with a wavelength of .25 m.  The Frequency of the wave is 3.0 Hz.  What is the speed of the wave?

• 3.00 m/s
• 2.50 m/s
• .75 m/s
• 1.25 m/s

 A wave has frequency of 5 Hz and a speed of 25 m/s. What is the wavelength of the wave?

• 25 m
• 125 m
• 5 m
• 25 m/s

A wave has wavelength of 10 m and a speed of 340 m/s. What is the frequency of the wave?

• 34 m/s
• 3400 Hz
• 3400 m/s
• 34 Hz

A guitar string vibrates with a frequency of 320 hz. If the wavelength of the vibration is 0.23 meters what is the speed of the wave?

• 320.23 m/s

• 1391.3 hz

• 73.6 m/hz

• 73.6 m/s