A force of 10 N is requrid to draw rectangular glass plate on the surface of a liquid with some velocity. Force needed to draw another glass plate of 3 times length and 2 times width is

A large force is required to draw apart normally two glass plates enclosing a thin water film. Why?

The force of 2000 dyne is required to move a flat glass plate of surface area 10 cm^(2) with a velocity of 1 cm/s over a surface of glycerine 1 mm thick. The coefficient of viscosity of glycerine is

The force of 2000 dyne is required to move a flat glass plate of surface area 10 cm^(2) with a velocity of 1 cm/s over a surface of glycerine 1 mm thick. The coefficient of viscosity of glycerine is

The focal length of a plano convex lens is f and its refractive index is 1.5. It is kept over a plane glass plate with its curved surface touching the glass plate. The gap between the lens and the glass plate is filled by a liquid. As a result, the effective focal length of the combination becomes 2f . Then the refractive index of the liquid is.........

The focal length of a plano-convex lens is f and its refractive index is 1.5 it is kept over a plane galss plate with its curved surface touching the glass plate. The gap between the lens and the glass plate is filled by a liquid. As a result the effective focal length of the combination becomes 2f . Then the refractive index of the liquid is

The focal length of a plano-convex lens is f and its refractive index is 1.5 it is kept over a plane galss plate with its curved surface touching the glass plate. The gap between the lens and the glass plate is filled by a liquid. As a result the effective focal length of the combination becomes 2f . Then the refractive index of the liquid is

An external force of 20 N acts normally on a rectangular plate of length 20 cm and breadth 10 cm. What is the maximum stress produced in the plate ?

A drop of Volume V is pressed between the two glass plates so as to spread to an area of A . If T is the surface tension, the normal force required to separate the glass plates is

When a liquid drop is placed on a glass plate, the liquid solid force is ____.