Question # 1

Which of the substance is lightest one?

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Copper

Aluminium

Mercury

Lead

Room are heated using gas heaters by:

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Conduction only

Convection and radiation

Radiation only

Convection only

Fossils fuels are usually compound of:

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Carbon

Hydrogen

Carbon & Hydrogen

None of these

Cos 0°=

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0.5

1

0.866

0

A train is moving at a speed 36 kmh^-1 Its speed expressed in ms^-1

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10 ms^-1

20 ms^-1

25m ms^-1

30 ms^-1

Value of g increases with the:

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Increase in mass of the body

Increases in altitude

decrease the altitude

None of the above

Light from the sun contain thermal radiation of:

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Long wavelength

Short wavelength

Ultra violet rays

Visible light

In which of the following state molecules don not leave their position?

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Solid

Liquid

Gas

Plasma

The number of forces that can be added by head to tail rule are

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2

3

4

Any Number

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

As we go up the value of atmospheric pressure is

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Decreased

Increased

Remain constnat

None of these

Mass per unit volume is:

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Velocity

Work

Density

None

Mathematically, % efficiency is defined as & nbsp

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Efficiency % required form or input/ total input energy x 100

Efficiency % input energy / output energy x 100

Efficiency % work / time x 100

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