Tuning forks 1, 2, and 3 each have slightly different frequencies.When 1 and 2 are sounded together, a beat frequency of 3 Hz results. When 2 and 3 are sounded together, a beat frequency of 5 Hz results. If the frequency of 1 is 100 Hz, which of the following cannot be the frequency of 3?
a. 92 Hz
b. 95 Hz
c. 98 Hz
d. 102 Hz
e. 108 Hz
Question 2
A fire engine approaches a wall at 5 m/s while the siren emits a tone of 500 Hz frequency. At the time, the speed of sound in air is 340 m/s. How many beats per second do the people on the fire engine hear?
a. 0
b. 15
c. 29
d. 63
e. 250
