Q1) The C string on a cello is tuned to produce a fundamental frequency of 65.4 Hz. Typically, the vibrating portion of

[answerhappygod]

Q1) The C string on a cello is tuned to produce a
fundamental frequency of 65.4 Hz. Typically, the vibrating portion
of the string is 69 cm long, but a cellist can press the string
against the finger board to reduce its vibrating length and produce
higher notes. Where should a cellist position their finger to
produce an F# (92.5 Hz)?
A. 11.4 cm from the end of the string B. 16.3 cm from
the end of the string C. 20.2 cm from the end of the string D. 25.7
cm from the end of the string
Q2) A toddler discovers that an empty 2 L soda bottle
with a length of 30 cm makes an excellent musical instrument. What
note do they hear when they blow air across its open end? Assume
the speed of sound in air is 343 m/s.
A. 1144 Hz B. 572 Hz C. 143 Hz D. 286 Hz
Q3) An orchestra conductor can easily be subjected to
110 dB during a performance. To protect their hearing, one
conductor wears earplugs that are rated to reduce noise levels by
40 dB. By what factor does the intensity of sound reaching their
eardrums drop?