Answer:
Pretty sure it's friction force
Explanation:
Because you pretty much just push it I guess
Gravity is when this can float but nebula is not
Deposition moves that have already been eroded, and builds up sediment.
erosion is just the moving of sediment from one place to another
Heya!!
For calculate speed of the wave, lets applicate formula:

<u>Δ Being Δ</u>
f = Frequency = 50 Hz
v = Velocity = ?
= Wavelenght = 10 m
⇒ Let's replace according the formula:

⇒ Resolving

Result:
The speed of that wave is <u>500 meters per second.</u>
Good Luck!!