Physics: Sound

Question 1

Describe the production of sound by vibrating sources.

Answer 1

Sound is produced by vibrating waves

Question 2

State the approximate human range of audible frequencies.

Answer 2

20 - 20,000Hz

Question 3

Describe transmission of sound in air in terms of compressions and rarefactions

Answer 3

Sound travels in air through a series of compressions and rarefactions that make up longitudinal wavelengths.

Question 4

Demonstrate understanding that a medium is needed to transmit sound waves

Answer 4

Sound needs a medium to travel

Question 5

Describe an experiment to determine the speed of sound in air.

Answer 5

Stand at a cliff face and make a short, sharp sound. Record the time from when you perform the sound and when you hear the sound return back to you. Divide this time by two.

Question 6

State the order of magnitude of the speed of sound in air, liquids and solids.

Answer 6

Solids, Liquids, Air

Question 7

Relate the loudness and pitch of sound waves to amplitude and frequency.

Answer 7

Loudness is controlled by the amplitude. Pitch is controlled by the frequency.

Question 8

Describe how the reflection of sound may produce an echo.

Answer 8

The sound comes back from the reflective material and may have been loud enough to produce a sound coming back idk this is confusing.