Select the value from the options below that represents the most typical speed of sound in water:
1.5 m/s,15 m/s,150 m/s,1500 m/s,15000 m/s 1.5\text{ m/s}, \quad 15\text{ m/s}, \quad 150\text{ m/s}, \quad 1500\text{ m/s}, \quad 15000\text{ m/s} 1.5 m/s,15 m/s,150 m/s,1500 m/s,15000 m/sSound travels in water as longitudinal waves consisting of compressions and rarefactions. Describe what is meant by:
A research boat uses an echo-sounder to determine the depth of a lake bed. The lake bed is 45 m below the echo-sounder.
Use your value for the speed of sound in water from (a) to calculate the time between sending out the pulse and receiving its echo.
The boat passes over a muddy region of the lake bed of the same depth where the reflection of sound waves is weaker. State whether there is an increase, a decrease, or no change in:
295 exam-style questions on CIE IGCSE Physics Sound, covering Sound. Each one has a worked solution and a mark scheme showing where the marks go.