[填空题]
A student uses the shown setu vmk7u60 3(h 6dcvmqf7fft5yj fwc8)* h0rjbs p tomb+n( joywuv ir 9:2r+ measure the speed of sound.
The sound source has a frequency of 590 Hz. The student changes the distance between the two microphones d and records the time difference Δt between the received sounds from the microphones.
The graph below shows the data from this experiment.
Draw the line of best fit.
Calculate the fractional uncertainty of d when the time difference Δt is 2.2m/s. %
Showing your working on the graph, calculate the speed of the sound wave is $ms^{-1}$.
Calculate the wavelength of the sound is $m$
