We think you are located in South Africa. Is this correct?

# Test yourself now

High marks in science are the key to your success and future plans. Test yourself and learn more on Siyavula Practice.

## Waves

Exercise 8.2

A wave travels along a string at a speed of $$\text{1,5}$$ $$\text{m·s^{-1}}$$. If the frequency of the source of the wave is $$\text{7,5}$$ $$\text{Hz}$$, calculate:

1. the wavelength of the wave

2. the period of the wave

Solution not yet available

Water waves crash against a seawall around the harbour. Eight waves hit the seawall in $$\text{5}$$ $$\text{s}$$. The distance between successive troughs is $$\text{9}$$ $$\text{m}$$. The height of the waveform trough to crest is $$\text{1,5}$$ $$\text{m}$$.

1. How many complete waves are indicated in the sketch?

2. Write down the letters that indicate any TWO points that are:

1. in phase

2. out of phase

3. Represent ONE wavelength.

3. Calculate the amplitude of the wave.

4. Show that the period of the wave is $$\text{0,625}$$ $$\text{s}$$.

5. Calculate the frequency of the waves.

6. Calculate the velocity of the waves.

Solution not yet available