Question # 1

In kelvin scale, lower reference point is:

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273 K

373 K

180 K

100 K

The work done will be zero when the angle between the force and the displacement is:

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45°

60°

90°

180°

Where there is no air the atmospheric pressure is:

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Zero

101300 Pa

7 nm Hg

1000 Nm^-2

If K = 150 N/m and elasticity is 0.20 m than:

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F = 30N

F= =31N

F = 32N

F = 29N

Which property can be determine by ARchimedes principle:

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Vapour pressure

Density

Compressibility

Elasticity

____________ is bad conductors of heat:

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Copper

Water

Wire

Nil

Quantities between which a graph is plotted are called.

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Scalars

Vectors

Variables

None

Pressure is quantity:

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Scalar

Vector

Constnat

Dependent

A body is in neutral equilibrium when its centre of gravity:

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Is at its highest position

Is at the lowest position

Keep its height if displaced

Is situated at its bottom

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

____________ from sun are major source of energy on earth.

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Light

Radiation

Both a & b

None of these

The specific heat of water is

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2100 Jkg-1 k-1

4200 Jkg-1 k-1

2500 Jkg-1 k-1

2010 Jkg-1 k-1

Gallium (element) melts at:

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40 °C

30 °C

80 °C

90 °C

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