Name: ______

Frequency/Period Practice Problems

Remember to include all units in your answer. SHOW YOUR WORK!

1.  If you drink a sip of water once every 10 seconds, what is the frequency with which you drink water (write as a fraction)?

a.  What is the period of time it takes you to drink one sip of water?

2.  A hummingbird flaps its wings 10 times every second. What is the frequency?

a.  What is the period of time it takes a hummingbird to flap its wings once?

3.  A wave makes one complete vibration in 5 seconds. What is its frequency?

a.  What is its period?

4.  A wave vibrates 20 times in 2 seconds. What is its frequency?

a.  What is its period?

5.  A wave vibrates once every 2 seconds. What is its frequency?

a.  What is its period?

6.  A wave makes 3 complete vibrations in 6 seconds. What is its frequency?

a.  What is its period?

Fill in the chart with the appropriate units for each measurement.

Measure / Units
Frequency
Period
Wavelength
Wave Speed

7.  What does frequency tell you?

8.  What does period tell you?

9.  What does wavelength tell you?

10. What does wave speed tell you?

Period =
Frequency =
Wave Speed =
OR
Wave Speed = Wavelength
Period

11.  If you know the frequency, write the equation will you use to find the period.

a.  What are the units of period?

12.  If you know the period, write the equation will you use to find the frequency.

a.  What are the units of frequency?

13.  If you know the wavelength and the wave speed, write the equation will you use to find the period.

a.  What are the units of period?

14.  If you know the frequency and wavelength, write the equation will you use to find the wave speed.

a.  What are the units of wave speed?

15.  If you know the wave speed and frequency, write the equation will you use to find the wavelength.

a.  What are the units of wavelength?

Use the equations above to answer the following questions:

16.  A girl swings her arms 2 times every second. What is the frequency? Use the appropriate units.

a.  What is the period?

17.  A pendulum swings back and forth 8 times in 12 seconds. What is its frequency? Use the appropriate units.

a.  What is its period?

b.  What is the wavelength if the speed of sound is 340 m/s?

18.  The frequency of a wave is 35 Hz. Its wavelength is 10m. What is the wave speed? Use the appropriate units.

a.  What is the period?