[2](a)A wave has a frequency of 50 Hz and a wavelength of 0.06 m. Calculate its speed.

[2](a)A water wave completes 4 oscillations in 2.0 s. Calculate its period and frequency.

[3](a)A ship's sonar sends a pulse of sound downward. The echo returns after 0.5 s. Taking the speed of sound in water as 1500 m/s, calculate the depth of water below the ship.

[3](a)Distinguish between a transverse wave and a longitudinal wave, giving one example of each.

[2](a)A wave has a frequency of 25 Hz. Calculate its period.

[2](a)A sound wave travels at 340 m/s and has a frequency of 170 Hz. Calculate its wavelength.

[2](a)A wave in water has a speed of 1500 m/s and a period of 0.002 s. Calculate its wavelength.

[3](a)A ship sends a sonar pulse and receives the echo 0.8 s later. Taking the speed of sound in water as 1500 m/s, calculate the depth of water.

[2](a)State whether light is a transverse or longitudinal wave, and name one property that distinguishes transverse waves from longitudinal waves.

[2](a)Explain what happens to the wavelength of a wave crossing from a fast medium into a slower medium, if the frequency stays the same.