Question

Urgent help for a physics exercise!

Answer 1

a)

Amplitude of wave is given as maximum displacement from mean position

So here amplitude is 1.25 cm

b)

Wavelength is the length of the wave that it travels in one time period

From graph we can say the wavelength is given as 3cm

PART C)

Time period of wave is the time after which it repeats its shape

Speed of the wave = 21 cm/s

time period = wavelength / speed

`T = (3)/(21)`

`T = (1)/(7) s`

Now frequency is

`f = (1)/(T)`

`f = 7 Hz`

PART D)

Time period = \frac{1}{f}[/tex]

`T = 0.143 s`