Answer:
0.120 m
Explanation:
F=kx where F is force and k is constant, x is extension from its original length
Making x the subject then substituting 12 N for F and 10.0 N/m for k then
Answer:
2.5 m/s
Explanation:
The speed of a wave is given by:
where
f is the frequency
is the wavelength
The wave in this problem hits the beach about every 2.0 seconds: this means that its period is 2.0 s. So the frequency is the reciprocal of the period
The crests are 5.0 m away from each other, so the wavelength is
Therefore, the speed of the wave is