Question # 1

The value of sin θ at an angle of 60o is

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0.5

0

0.707

0.866

According to Archimedes principle the density of a substance is determined by using formula

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D = w1/w2 + w1 x p

D = w1w2/w2- w1 x p

D = w1/w2 - w1 x p

D = w1w2/w2- w1 x p

As we go up the value of atmospheric pressure is

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Decreased

Increased

Remain constnat

None of these

A line about which a body rotates is called;

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Axis of rotation

Rigid Body

Center of gracity

None of these

The ratio of stress to strain is constant,This is known as

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Hook's law

Tensile strain

young's modulus

strain

A body is said to be in __________ equilibrium if after a slight tilt return to its previous position:

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Stable

Unstable

Neutral

None

During the hot summer day the vlaue of atomospheric pressure is:

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Increase

Decreases

Constant

None of these

In thermo flask radiation is stopped by using :

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Green color

Transparent

Silver color

Nil

Sliding friction can be changed into rolling friction by using:

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Ball bearing

Roller bearing

Both a and b

None of these

Rolling friction is___________ then sliding friction :

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Greter

Less

Some

Half

If the object is at rest to T .............. W.

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=

=/

<

>

A string is stretched by two equal and opposite forces 10 N each. The tension in the string is

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Zero

5N

10N

20N

The type of hydrometer which is used to measure the concentration of acid in a battery is called:

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Chemical meter

Acid meter

Barometer

pH meter

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