Question # 1

The number of significant figures with the increases degree of approximation

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Decreases

Increases

Remains unchanged

None of these

If the initial velocity of a projectile becomes doubled, the time of fight will be.

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Same

4 times

Double

3 times

Hot igneous rocks, usually in molten or partly molten state are found in the depth of

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5 km

10 km

15 km

20 km

1 torr in Nm-2 is expressed as.

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130.5 Nm-2

133.3 N m-2

140.2 Nm-2

135.2 Nm-2

All point of the rigid body rotating about a fixed axis do not have same.

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Angular acceleration

Angular speed

speed

Angular displacement

The dimensional of potential energy per unit volume are same as that of.

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Work

Pressure

Speed

Density

The direction of angular velocity of along the

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Tangent at that point

Axis of rotation

Radius towards the centre

Radius away from the centre

The weight of an object an elevator moving down with an acceleration of 9.8 m/s2 will becomes

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Half

Double

Unchanged

Zero

A swing is good example of

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Resonance

Vibration

Time period

Oscillation

When the projectile reaches the highest point of trajectory, the vertical component of velocity becomes.

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Small

Zero

Maximum

Vi cos

If the temperature of sink is absolute zero then the efficiency of heat engine engine should be.

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100%

50%

Infinite

zero

The dimension of viscosity are

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[M2L-2T2]

[M-1LT-1]

[M-1L-1T]

[ML-1T-1]

If velocity 'v' of an object is double, then K.E. because.

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Remain same

Sixteen times

Double

Four times

During adiabatic process, which factor remains constant.

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Entropy

Pressure

Momentum

Power

In stationary waves, the particle velocity at nodes is

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Minimum

Maximum

Zero

Constant

The distance between two consecutive wave front is equal to

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One wave length

Two wave length

Half wave length

Three wave length

P.E. of a spring is stored in

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Spring

mass

Both of them

None of these

Light year is the unit of

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Distance

Time

Light

Velocity

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