What is pressure?

What is the pressure on a swimmer 10m below the surface of a lake?

What is the pressure inside the drop of mercury of radius 3.00 mm at room temperature? Surface tension of mercury at that temperature (20^@C) is 4.65 xx 10^-1 N m^-1 . The atmospheric pressure is 1.01 xx10^-5 Pa. Also give the excess pressure inside the drop.

A vessel of 100 ml capacity contains a gas at 30^@C at 1.5 bar pressure . The gas is transferred to another vessel of volume 150 ml at 30^@C What would be its pressure?

A 50 kg girl wearing high heel shoes balances on a single heel. The heel is circular with a diameter 1.0 cm. What is the pressure exerted by the heel on the horizontal floor?

Why does a gas exert pressure on the wall of its container?What are the two factors on which this pressure depends?

What is imbibition pressure? What is the usefulness of imbibition pressure to seed germination?