A rectangular cement block has length, breadth and height of 60 cm, 30 cm and 15 cm respectively. Identify the correct position of the block and pressure exerted by it on the ground.

1. Minimum pressure is exerted when breadth and height form the base.
2. Maximum pressure is exerted when breadth and height form the base.
3. Maximum pressure is exerted when length and breadth form the base.
4. Minimum pressure is exerted when length and height form the base.

The incorrect statement from the following is :

1. The pressure exerted by the liquid filled in a vessel is same at all points.
2. The pressure of liquid is same in all directions in a horizontal plane.
3. The pressure of a liquid on a surface does not depend on the area of surface.
4. The pressure of liquid at its free surface is zero.

What physical quantity is measured in bar ?

How is the unit bar related to the S.I. unit pascal ?