S5 Physics Unit Test Ch13-14

What is the approximate range of hearing of a healthy human ear?

• 2.0 Hz to 2.0 kHz

• 20 Hz to 2.0 kHz

• 2.0 Hz to 20 kHz

• 20 Hz to 20 kHz

A sound wave has certain amplitude and a certain frequency. A second sound wave is quieter and lower in pitch than the first sound wave. The second wave has...

• a larger amplitude and a greater frequency

• a larger amplitude and a smaller frequency

• a smaller amplitude and a greater frequency

• a smaller amplitude and a smaller frequency

These instruments are played by striking them.

• Percussion instruments

• Wind instruments

• Stringed instruments

• Brass instruments

The unit of frequency is ___ .

• T

• Hz

• T/s

• Hz/s

The images show the wave patterns of four sounds shown on a cathode-ray oscilloscope (CRO). The oscilloscope controls are set the same for each sound.

Which sound has the highest pitch?

• 
• 
• 
• 

The ____ of a sound travel through a material at the speed of sound.

• echo

• frequency

• vibrations

• source

Sound travels by wave motion. Which property of waves causes echoes?

• Diffraction

• Dispersion

• Reflection

• Refraction

A student listens to a machine that makes sounds of different frequencies. He can only hear one of the sounds. Which frequency of sound is the student able to hear?

• 2 Hz

• 10 Hz

• 2 kHz

• 30 kHz

The frequency of a musical note is increased. A student hearing the sound detects an increase in which property?

• loudness of the sound

• pitch of the sound

• speed of the sound wave

• wavelength of the sound wave

An echo-sounder on a ship produces a pulse of sound. The echo is received by the echo-sounder after two seconds. The speed of sound in sea-water is 1500 m/s. What is the depth of the sea-water below the ship?

• 750 m

• 1500 m

• 3000 m

• 6000 m