Question

Why we feel our palm being pushed up when we dip open hand in a bucket full of water?

Answer 1

So, it's not just our palm but anything which when pushed against the volume of any liquid (which in our case is water) will experience and upward thrust or force. This force or thrust exerted by liquid is called as Buoyant Force, and phenomenon is known as Buoyancy.
Hope it helped.

Answer 2

Answer:

This pressure is reduced as you climb up in altitude and the weight of air above ... stories, but you need only dive a meter or so below the surface of a pool to feel a ... The vertical sides cannot exert an upward force on the fluid (since it cannot ... to the weight of any fluid of average density ρ at any depth h below its surface.