Question # 1

Perpendicular / Hypotenuse is called :

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Cos 𝜽

Sin 𝜽

Tan 𝜽

Tan^-1 𝜽

All divers need to wear seat belt because of effect of:

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Air resistance

Tensional

Push force

Gravitational

In Einstein's mass-energy equation ,c is the

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Speed of sound

Speed of light

Speed of electron

Speed of Earth

At sea level, the atmospheric pressure is about.

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101320 Pa

101300 Pa

10110 Pa

10112 Pa

A black dull surface is a good ________ of heat:

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Emitter

Absorber

Reflector

Both A and B

Sin 45^ois

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0.707

0.5

1

0.2

Ability of body to do work due to its height is called.

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potential energy

kinetic energy

gravitational potential energy

elastic potential energy

The method used for addition of non-parallel forces is.

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Algebraic

Head to trail rule

Mathematical

Nil

Heat travels from __________

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Colder to hotter

Hotter to colder

Both a & b are possible

None of above

The density of water is:

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5500 kgm^-3

10000 kgm^-3

1000 kgm^-3

330 kgm^-3

If mass of a body becomes half that its energy K.E will be reduce to:

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Zero

Half

Double

4 Times

The kinetic energy of the body of mass 1000 kg moving a speed of 20 ms^-1 will be:

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2 x 10² J

2 x 10³J

2 x 10⁵J

2 x 10⁸J

The mass of Earth is

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6 x 1018 kg

6 x 1020 kg

6 x 1022 kg

6 x 1024 kg

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