Wave speed, frequency and wavelength

Answer Key - Grade 11 Science Worksheet - Building Confidence

Circle the best answer, or write your answer on the line.

1. 1.

   Water-tank ripples have a frequency of 4 Hz and a wavelength of 0.03 m. What is its speed, Ari?

   0.12 m/s
2. 2.

   A rope wave has a frequency of 2.5 Hz and a wavelength of 1.2 m. What is its speed, Bo?

   3 m/s
3. 3.

   A slinky wave has a frequency of 1.5 Hz and a wavelength of 0.8 m. What is its speed, Esme?

   1.2 m/s

4. Read this first

   Wave diagram (example data)

   Ripples in a water tank seen from the side. A ruler shows the crests 0.04 m apart. A clock shows 10 crests passing a marker in 2 s.

5. 4.

   In the wave diagram, what is the ripples' wavelength, Jun?

   • 10 m
   • 0.04 m
   • 0.4 m
6. 5.

   A wave has a frequency of 5 Hz. What is its period, Milo?

   • 2 s
   • 0.2 s
   • 5 s
7. 6.

   A wave's period is 0.5 s. What is its frequency, Noah?

   • 5 Hz
   • 2 Hz
   • 0.5 Hz
8. 7.

   What does a frequency of 1 Hz mean, Pia?

   • The wave moves at 1 m/s
   • One wave passes each second
   • Each wave is 1 m long from crest to crest
9. 8.

   What sets the speed of a wave on a rope, Ren?

   • How fast the hand shakes it
   • How tall the waves are
   • The rope itself, through its tension and mass
10. 9.

    A hand shakes the same rope faster, at the same tension. What happens to the wavelength, Tala?

    • It gets shorter
    • It stays the same, but the waves go faster
    • It gets longer
11. 10.

    What sets the frequency of a wave, Zee?

    • The medium it travels through
    • Its wavelength alone
    • The source that makes it