Question # 1

The substances through which heat does not conduct:

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Conductors

Bad conductors

Insulators

Both B and C

The changing of a liquid into vapours from the surface of the liquid

without heating:

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Cooling

Vaporization

Evaporation

Sublimation

Heat reflected form the body depends upon :

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Colour and form

Form and speed

Color and speed

None

Unit of thermal conductivity is .

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Wmk

W m^-1 K^-1

Wm

None of these

if force on body on y-axis is 100N than x-axis is:

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1000 N

200 N

600 N

0 N

The value of gravitational constant is SI unit is

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0.673 x 10-10

6.673 x 10-11

4.32 x 10-9

5.32 x 10-11

If the mass of moving body in a circle is doubled then centripetal force wil be:

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Doubled

Half

4 times

Same

P.E is equal to:

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mgh

1/2 mv²

W x F

None of these

In ___________ (CFC) was found reacting with ozone.

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1920s

1970s

1950s

1960s

Running water possess energy:

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Kinetic

Potential

Elastic Potential energy

Gravitational potential energy

The number 275.00 consists of significant figures.

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4

3

2

5

The formula for centripetal force is:

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Fc = mv2

Fc = mr2

Fc = mv2 / r

Fc = m/v

A Leslie cube is use to identify :

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Radiation

Conduction

Convection

Both A and B

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