Question # 1

X-ray diffraction has been very useful in determining the structure of

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Hemoglobin

Stars

Galaxies

Stones

Dot product of vector with itself is.

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Zero

2 A

A²

A

Blood has density equal to that of

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Mercury

Sodium

Honey

Water

The law of conservation of mass gives us

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Equation of continuity

Stock's law

Bernoulli's equation

Viscosity

Pascal is the unit of

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Pressure

Force

Tension

Weight

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

When the car moves with an increasing acceleration then its velocity time graph is always

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Constant

Variable

A straight line

A curve

the acceleration of a body having SHM, depends upon its.

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Time period

Amplitude

Frequency

Displacement from mean position

Increase in the velocity of sound in air for 1 ^oC rise in temperature is.

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61 ms-1

0.61 ms-1

161 ms-1

261 ms-1

the shortest distance between two points is called.

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Speed

Acceleration

Distance

Displacement

Diffraction is a special type of

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Reflection

Polarization

Interference

Refraction

Vector has both of its components are negative lies in

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1st quadrant

2nd quadrant

3rd quadrant

4th quadrant

The dot product of two vectors A and B will be zero, if angle between A and B is

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Zero

30^o

90^o

180^o

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

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Maximum

Infinite

Zero

Varible

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

Light waves are

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Longtail waves

Transvers waves

Stationary waves

Mechanical wave

In vibrating string, the points where the amplitude is maximum are called.

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Nodes

Antinodes

Troughs

Crests

If focal length of objective and eye piece is 0.5 m and 10 cm respectively then magnifying power of telescope will be.

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0.5

5

10

20

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