When a ship enters a sea from a river, what happens?

What happens when some charge is placed on a soap bubble?

An ice cube is floating in a glass of water. What happens to the water level when the ice melts? It –

Why it is easier to swim in the sea than in a river?

If two bubbles of soap of different diameter come in contact with a tube, then what will happen?

While lifting a bucket of water from a well, we feel that the bucket :