µ GCSE | Wave Formulas

10 quick questions - for GCSE or iGCSE

 

10 minutes maximum! (can you do it in 5?)    

In a small pool by the beach, 20 small water waves hit a rock every 5 seconds.

1. The frequency of the waves is....

  • A. 0.25 Hz
  • B. 0.25 s
  • C. 4 Hz
  • D. 4 s

2. The period of the waves is....

  • A. 0.25 Hz
  • B. 0.25 s
  • C. 4 Hz
  • D. 4 s

3. The time period of a sound wave with a frequency of 200 Hz will be...

  • A. 0.5 s
  • B. 0.2 s
  • C. 5 ms
  • D. 2 ms

4. Which of these is the correct formula for wave speed?

  • A. wave speed = frequency x amplitude
  • B. wave speed = frequency x wavelength
  • C. wave speed = wavelength x amplitude
  • D. wave speed = frequency x amplitude x wavelength

 

5. Which of these is the standard unit for wave speed?

  • A. m Hz
  • B. Hz / m
  • C. m/s
  • D. s/m

 

What are the missing values in this results table from experiments with water waves?

Frequency Wavelength Wave speed
6. 2 Hz 8 m
7.
0.1 Hz 10 m/s
8. 13 m 3.9 m/s

Q9&10.

In an experiment to measure the speed of sound, a student bangs together 2 wooden blocks. Another student listens out for the echo from the wall.

They take a large number of readings including...

  • I. The mass of the blocks = 0.5 kg each.
  • II The distance to the wall = 50 m
  • III. The time between the blocks being hit and hearing the echo = 0.3 s

 

 

 

9. Which readings are needed to work out the speed of sound?

  • A. II only
  • B. I and II
  • C. II and III
  • D. I, II and III.

 

10. Using the data above, what is the speed of sound?

  • A. 167 m/s
  • B. 15 m/s
  • C. 30 m/s
  • D. 333 m/s