Why does the speed of a liquid increase and its pressure decrease when a liquid passes through constriction in a horizontal pipe ?

The freezing point of the liquid decreases when pressure is increased, if the liquid

If P is the pressure on a Liquid of area A and the liquid moves through a certain distance the work done per unit volume is "_____".

A pendulum bob on a 2 m string is displaced 60^@ from the vertical and then released. What is the speed of the bob as it passes through the lowest point in its path ?

Explain , why the free surface of some liquid in contact with a solid in not horizontal.

The cylindrical tube of a spray pump has radius R , one end of which has n fine holes, each of radius r . If the speed of the liquid in the tube is V , the speed of the ejection of the liquid through the holes is:

The wire does not breaks the ice slab while passing through it.Why?

When its unpolarized light is passed through a polarizer, its intensity

Two pistons (areas A_(1) and A_(2)) exerting forces F_(1) and F_(2) on a liquid exerts pressures P_(1) and P_(2) as shown in figure. The pistons are at the same horizontal level and do not move under the influence of force, then

When the temperature increased the angle of contact of a liquid

If a liquid does not rise or fall in a capillary tube , then its angle of contact is