Afisherman fishing from a pier observes that the float on his line bobs up and down, taking 2.4 s to move from its highest point to its lowest point. he also estimates that the distance between adjacent wave crests is 48 m. what is the speed of the waves going past the pier?

Speed of the wave, v = 10 m/s

Explanation:

Given that,

The distance between adjacent wave crests is 48 m,

Time taken to move highest point to the lowest pint, T = 2.4 s

For a full period, time taken is,

T = 4.8 s

Let v is the speed of the waves going past the pier. It is equal to the product of frequency and wavelength. It is equal to :

v = 10 m/s

So, the speed of the wave is 10 m/s. Hence, this is the required solution.

it's when something is going so fast it makes a loud noise, breaking the sound barrier, for example: a jet makes a loud noise, not only cause of the jet but because they reached a point where they went so fast that you can year the noise from various parts, kinda like a police car, lets say the car was going   so fast that you hear the siren of the cop car right next to you, but the car is probably a mile a way, it's cos the siren was next to you a few seconds if you understand me