Which one of these statements is correct about a sound wave?

1.   ?    It is a transverse wave
2.   ?    It can travel in a vacuum
3.   ?    It is a longitudinal wave
4.   ?    It does not have any wave properties.

Which one of these statements describes correctly how sound waves travel?

1.   ?    As a series of pulses that vibrate at 90 degrees to the direction of travel.
2.   ?    As a series of crests and troughs that vibrate at 90 degrees to the direction of travel.
3.   ?    As a series of crests and troughs that vibrate parallel to the direction of travel.
4.   ?    As a series of pulses that vibrate at parallel to the direction of travel.

An area of low pressure in a sound wave is called:

1.   ?    Refraction
2.   ?    Rarefaction
3.   ?    Reflection
4.   ?    Compression

The speed of sound in air is:

1.   ?    340 m/s
2.   ?    1500 m/s
3.   ?    6000 m/s
4.   ?    300 000 000 m/s

The speed of sound in water is 1500 m/s. The wavelength of a note of 440 Hz played in water is:

1.   ?    0.77 m
2.   ?    3.41 m
3.   ?    7.70 m
4.   ?    34.1 m

Which one of these is the correct range of frequencies that can be heard by the human ear?

1.   ?    20 - 2000 Hz
2.   ?    20 - 20 000 Hz
3.   ?    200 - 2000 Hz
4.   ?    200 - 20 000 Hz

A waveform is displayed on a CRO screen. It shows one complete wave across the screen. Then a second waveform is displayed, showing three complete waves across the screen. The height of both waves is the same. Which one statement is correct?

1.   ?    The pitch of the second wave is the same as that of the first. The loudness is the same.
2.   ?    The pitch of the second wave is the same as that of the first. The loudness of the second wave is three times that of the first.
3.   ?    The pitch of the first wave is three times that of the second. The loudness is the same.
4.   ?    The pitch of the second wave is three times that of the first. The loudness is the same.

Two notes of exactly the same frequency and loudness are played one after the other. Which property of sound enables us to tell what instrument is being played?

1.   ?    The pitch.
2.   ?    The amplitude.
3.   ?    The quality.
4.   ?    The volume.

A ringing bell is placed a bell jar which is connected to a vacuum pump. Which one of these statements describes correctly what happens in the experiment?

1.   ?    The bell gets fainter until it can no longer be heard.
2.   ?    The bell gets louder.
3.   ?    There is no difference to the loudness of the bell.
4.   ?    The bell stops working as it cannot operate in a vacuum.

Which statement correctly describes reflection and refraction in sound waves?

1.   ?    Sound waves can only be reflected.
2.   ?    Sound waves can only be refracted.
3.   ?    Sound waves can be both reflected and refracted.
4.   ?    Sound waves can neither be reflected nor refracted.