Question 1 (1 point)

Both ends of a hollow tube with a length of 10 m are open. What is the longest wavelength of a standing wave that is possible?

Question 1 options:

a	15 m
b	5 m
c	10 m
d	20 m

Question 2 (1 point)

Two loudspeakers produce signals with 110.0 Hz and f₂ Hz respectively. If 4.0 beats are heard in 2.0 s, , what is the frequency f₂?

Question 2 options:

a	114 Hz
b	112 Hz
c	106 Hz
d	Two of these frequencies would result in the indicated beat frequency

Question 4 (1 point)

A orchestra that is tuning its instruments is recorded by microphone to have a sound intensity level of 74.3 dB. During their concert performance, the intensity of sound generated by the orchestra is measured at the microphone to be 263 times greater than the intensity of sound while tuning. What is the sound intensity level of the orchestra during the concert performance?

Express you answer in dB with one decimal place, but do not include units in your answer.

Question 5 (1 point)

A speaker is producing spherically symmetric sounds. The speaker is located at the centre of a sphere with a radius of 3.00 m. The power received on an area 1.00 m by 1.40 m on the sphere is 0.25 W. What is the total power of the speaker? Give your answer in Watts to 1 decimal place. Do NOT include units in your answer.

Your Answer: