Question

1. A vibrating string is cut in half. The fundamental frequency of the string will be...

a. doubled

b. unchanged

c. reduced by half

2.On a pipe organ, for a closed pipe, if you double the length of the pipe, what happens to the fundamental frequency?

a. It does not change.

b. It doubles.

c. It is reduced by half.

d. It is reduced by 1/4.

e. It is increased 4x.

3. When you blow gently across the top of a particular soda bottle, it emits a tone. The column of air in the bottle is vibrating up and down in its fundamental mode. If you replace the air in the bottle with something heavier than air (like carbon dioxide) and then blow gently across the top of the bottle, it will emit

a) a higher pitched tone. b) a tone at the same pitch as before.

c) no sound at all. d) a lower pitched tone.

9. If you blow across the top of a half full bottle of soda you can produce a clear tone. If you take a drink of soda to reduce the amount of liquid in the bottle and try this again the pitch (frequency) of the sound produced will

a) increase. b) stay the same.

c) exactly double. d) decrease.

Answer 1

multiple questions allowed to solve 1 question only.

3. When you blow gently across the top of a particular soda bottle, it emits a tone. The column of air in the bottle is vibrating up and down in its fundamental mode. If you replace the air in the bottle with something heavier than air (like carbon dioxide) and then blow gently across the top of the bottle, it will emit

a) a higher pitched tone. b) a tone at the same pitch as before.

c) no sound at all. d) a lower pitched tone.

answer) is part d) a lower pitched tone. =======================answer)

9. If you blow across the top of a half full bottle of soda you can produce a clear tone. If you take a drink of soda to reduce the amount of liquid in the bottle and try this again the pitch (frequency) of the sound produced will

a) increase. b) stay the same.

c) exactly double. d) decrease.

answer) is d) decrease. ===================>>>>>>>>>>answer)