When a stone is thrown on the surface of water, a wave travels out. From where does the energy come ?

A stone is dropped on the surface of water in pond. Name the type of waves produced.

A stone is thrown upwards from the surface of the earth with an initial speed of 5 m/s. The stone comes to rest at a height of : (g = 1000 "dyne"//g)

When a wave travels from a denser to rarer medium, then

When a sound wave travels from water to air , it

A cork is placed on the surface of water. A small stone is dropped in the water. As a result wave motion is produced on the surface of water and the cork starts moving. What kind of motion does the cork describe ?