Question # 1

Rate of change of velocity is called

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Speed

Acceleration

Displacement

Torque

Dot product of vector with itself is.

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Zero

2 A

A²

A

The speed \velocity of sound is greatest in.

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Air

Steel

Ammonia

Water

The unsteady flow of a fluid is called

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Stream line

Turbulent flow

Average flow

Viscous flow

The sum of two or more vectors will be a single vector called

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Component vector

Position vector

-ve vector

Resultant vector

The SI unit of power is

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Joule

Newton

Watt

Kilowatt

The force and torque are analogous to

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Velocity

Mass and weight

Moment of Inertia

Each other

In stationary waves, the velocity of particle at the node is.

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Maximum

Infinite

Zero

Varible

The circumference fo the earth was determined by

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Bohr

A Beruni

Ibn al Haithm

Chadwick

_______ is bio fuel

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Water

Petrol

Ethanol

Oil

The K.E. of bullet of mass 500 gm moving at a speed of 200 ms-1

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250 J

125 J

2500 J

10,000 J

The number 64.350 is rounded off as

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64.4

64.46

63.35

64.36

Usually the x-axis is taken as

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Vertical axis

Horizontal axis

+ve axis

-ve axis

The fluid is said to be incompressible, if its density is.

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Zero

Very high

Constant

Very small

The motion of a body moving along a circular path is called.

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Translational motion

Angular motion

Vibratory motion

Linear motion

The error in speed of sound calculated by Newton at STP is about.

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0 %

14 %

15 %

16 %

If a body is moving in the counter clockwise direction the direction of angular velocity will be

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Toward the centre

Away from the centre

along the linear velocity

Perpendicular to both radius and linear velocity

Torricelli's theorem is given by

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