Question # 1

When ice is cooled below 0 ^oC it:

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Expand

Contracts

Boils

None of these

False celling is done to

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Lower the height of ceiling

Keep the roof clean

cool and room

Insulate the ceiling.

In houses, good thermal insulation means _____________ consumption of fuel:

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Lower

Higher

Normal

None

The main source of energy in the unierse is:

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Moon

Stars

Sun

Planets

Significant figures in 0.0010 are.

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One

Two

Three

Four

The bad conductor of Heat is:

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Iron

Copper

Air

Aluminium

When equal opposite forces are added then the resultant force is ______________

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Double

Triple

Zero

None of these

The S.I unit of work is :

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J

N

Kg

m

It base of a right angled triangle is 3 cm and its perpendicular is 3 cm.Then its hypotenuse will be

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2 cm

4 cm

6 cm

5 cm

Formula of work is:

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F X S

F X V

F/S

S/F

Shining silvered surface is a best:

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Emitter

Absorber

Reflector

None of these

If f = 40 N is applied and bus is move 1m than work is :

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40 J

60 J

80 J

No work

The average speed of cheetah is.

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60 kmh^-1

70 kmh^-1

75 kmh^-1

80 kmh^-1

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