Mark the wrong statement.

The upper end of a wire of radius 4 mm and length 100 cm is clamped and its other end is twisted through an angle of 30° Then what is the angle of shear?

The pairs each determines a plane. Then the planes are parallel if

Cross product of two vectors is equal to the product of their magnitudes and sin of the angle between them. When two vectors are parallel, the angle between them is zero resulting their dot product as zero.

The lower surface of a cube is fixed. On its upper surface is applied at an angle 30º of  from its surface. What will be the change of the type?

For a given material the Young's modulus is 2.4 times that of rigidity modulus. What is its poisons ratio?

If the volume of a block of aluminum is decreased, by the pressure (stress) on its surface is increased by. (Bulk modulus of 

The isothermal elasticity of a gas is equal to.

When a 4 kg makes a hung vertically on a light spring that obeys Hook's law, the spring stretches by  2 cm what will be the work required to be done by an extenal agent in stretching this spring by 5 cm?

Equal masses of 3 liquids A, B and C have temperatures C , C and C respectively. If A and B are mixed, the mixture has a temperature of C. If B and C are mixed,the mixture has a temperature of ºC . If A & C are mixed the temperature of the mixture is

k is the force constant of a spring what will be the work done in increasing its extension form   to  be

When a coin is tossed, p(X = r heads)=

If X B(20, 1 / 2) The variance is

 then the values of  a and b are

When a force is applied on a wire of uniform cross-sectional area   and length 4 m, the increase in length is 1 mm. what will be energy stored in it ?

On stretching a wire what is the elastic energy stored per unit volume?

The dot in figure represents the initial state of a gas An adiabat divides the p-V diagram into regions 1 and 2 as shown As the gas moves down along the adiabatic, the temperature