Question # 1

Heat travels from __________

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Colder to hotter

Hotter to colder

Both a & b are possible

None of above

The value of gravitational acceleration when a body is moving in downward direction is.

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10 ms^-1

10 ms^-2

10 m

-10 ms

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

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Zero

Half

Double

4 Times

The freezing point of Mercury is:

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49 ^oC

-49^oC

39^oC

-39^oC

There are ways to transfer the heat from one place to another.

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1

2

3

4

To make a body more stable ________ should be lowered:

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Axis of rotation

Center of gravity

Stabilty

None

When a substance is changed from its solid state to liquid state by adding heat, the process is called

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Melting

Fusion

Freezing

A and B both

How many scales of measurement of temperature are?

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One

Two

Three

Four

A couple is formed by:

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two forces perpendicular to each other

Two like parallel forces

To equal and opposite forces in the same line.

Two equal and opposite forces not in the same line

The quantities that describe completely by magnitude and direction are.

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Scalar

Vector

Base

Derived

Science is that word which is derived by Latin word.

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Scient

Scientis

Scientia

Sciincet

Energy cannot be destroyed however it can be converted into some other forms. This is known as:

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Law of heat exchange

Law of conservation of energy

Law of conservation of momentum

None of these

A force of 10 N is making an angle of 30o with the horizontal. Its horizontal component will be

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4N

5N

7N

8.7N

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