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After a lightning strike the thunder is heard a few seconds later.
Explain why there is a time delay.(1)

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From the list below pick two quantities that you must measure to find the speed of sound by experiment.

(Wavelength, time, amplitude, force, acceleration, distance, weight.)(2)

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Describe how you would calculate the speed of sound from your results.(1)

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A sound wave travels at 340 m/s for 8 s.

Calculate the distance travelled.(2)

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A sound wave travels at 340 m/s for 1.7 km.

Calculate the time taken. (2)

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Arnie fires a gun near a tall building.
1.5 s later he hears the echo.
Calculate the distance between Arnie and the building.
( Take the speed of sound as 340 m/s. )(3)

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Label the parts of the wave (a) to (d).

(e) How many wavelengths are shown in the diagram?(5)

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A 4 Hz water wave has a wavelength of 30 cm.
Calculate its speed.(2)

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A sound wave is travelling at 340 m/s and has a frequency of 5 kHz.

Calculate its wavelength.(2)

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A water wave of wavelength 4 m travels 20 m in 2.5 s.

Calculate its frequency in hertz.(3)

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A buzzer produces 200 waves every second.
What is the frequency of the waves?(1)

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A girl wiggles 20 waves in ten seconds along a skipping rope.
Calculate their frequency.(2)

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Five waves pass a point every second. Calculate the time it takes one wave to pass.(2)

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One complete wave passes a point in 0.125 s. Calculate its frequency.(2)

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A pupil is measuring how long it takes a wave to pass a point but the time is very short.
How could this be measured more accurately?(2)

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