Question

A stroboscope was used to determine the frequency of the string oscillator. Strobe frequencies f_s were recorded where a single stationary image of the oscillating string was observed. The frequency of the oscillator f can be determined from the stroboscope frequencies f_s by f = nf_s where n is an integer corresponding to the number of oscillations per flash. The strobe frequencies produced were determined and tabled below:

Strobe Frequency fs Hz	Oscillations per flash n
22.9	m
15.2	m+1
11.8	m+2
8.8	m+3

m an integer, is determined to be 2.

The oscillator frequency is determined to be f = 45.65 Hz, from the average of nf_s.

Use the mean error technique to determine the uncertainty f. Express the answer to two decimal places, with the SI unit included.

Answer 1