Complete the following sentences —

(a) Pressure at a depth h in a liquid of density ρ is ___ .

(b) Pressure is in all directions about a point in a liquid.

(c) Pressure at all points at the same depth is _.

(d) Pressure at a point inside a liquid is __ to it's depth.

(e) Pressure of a liquid at a given depth is _ to the density of liquid.

What is meant by pressure ? State its S.I. unit.

How does the pressure exerted by a thrust depend on the area of surface on which it acts ? Explain with a suitable example.

Why is the tip of an allpin made sharp?