An elastic string of unstretched length and force constant is stretched by a small length . It is further stretched by another small length . The work done in the second stretching is

#### Answer:The correct answer is:

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A shell of mass moving with velocity suddenly breaks into 2 pieces. The part having mass remains stationary. The velocity of the other shell will be

A shell of mass moving with velocity suddenly breaks into 2 pieces. The part having mass remains stationary. The velocity of the other shell will be

#### If then B=

#### If then B=

#### (Me)_{2}SiCl_{2} on hydrolysis will produce -

#### (Me)_{2}SiCl_{2} on hydrolysis will produce -

#### The coefficient of in is

#### The coefficient of in is

#### The set S : = { 1, 2, 3 .........12} is to be partitioned into three sets A, B, C of equal size. Thus A B C = S, A B = B C = A C = . The number of ways to partition S is -

× =

#### The set S : = { 1, 2, 3 .........12} is to be partitioned into three sets A, B, C of equal size. Thus A B C = S, A B = B C = A C = . The number of ways to partition S is -

× =

#### (Me)_{2}SiCl_{2} on hydrolysis will produce -

Silicone

#### (Me)_{2}SiCl_{2} on hydrolysis will produce -

Silicone

A one kilowatt motor is used to pump water from a well 10 m deep. The quantity of water pumped out per second is nearly

A one kilowatt motor is used to pump water from a well 10 m deep. The quantity of water pumped out per second is nearly

#### Assertion (A) : The Remainder obtained when the polynomial is divided by Is 1

Reason (R): If is divided by then the remainder is f(a)

#### Assertion (A) : The Remainder obtained when the polynomial is divided by Is 1

Reason (R): If is divided by then the remainder is f(a)

A ball hits the floor and rebounds after inelastic collision. In this case

By the conservation of momentum in the absence of external force total momentum of the system (ball + earth) remains constant

A ball hits the floor and rebounds after inelastic collision. In this case

By the conservation of momentum in the absence of external force total momentum of the system (ball + earth) remains constant

#### The coefficient of in is

#### The coefficient of in is

Statement I Two particles moving in the same direction do not lose all their energy in a completely inelastic collision.

Statement II Principle of conservation of momentum holds true for all kinds of collisions.

Statement I Two particles moving in the same direction do not lose all their energy in a completely inelastic collision.

Statement II Principle of conservation of momentum holds true for all kinds of collisions.

Statement I Two particles moving in the same direction do not lose all their energy in a completely inelastic collision.

Statement II Principle of conservation of momentum holds true for all kinds of collisions.

Statement II Principle of conservation of momentum holds true for all kinds of collisions.

A mass M is lowered with the help of a string by a distance h at a constant acceleration g/2. The work done by the string will be

A mass M is lowered with the help of a string by a distance h at a constant acceleration g/2. The work done by the string will be