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Pressure exerted by a man on earth is most

• while standing
• while sitting
• while lying down
• while moving

Kerosene of mass 100 g is mixed with 100 g of water. one of the under given options that will describes the reason for kerosene to float on water is

• mass of displaced water is less than the mass of kerosene of equal volume
• mass of kerosene is more than the mass of equal volume of water '
• mass of kerosene is less than the mass of displaced water
• mass of kerosene is equal to mass of displaced water

If two pieces of different metals when completely immersed in water experience equal upthrust, then

• both pieces have equal weight in air
• both pieces have equal density
• both pieces have equal volume
• both are immersed to the same depth

The volume of a substance is 20 cm^3. The mass of the substance if its relative density is 2.5 will be

• 5 g
• 50 g
• 500 g
• 5 kg

A piece of wood is floating in water kept in a bottle. the bottle is connected to an air pump. Neglect the compressibility of water. when more air is pushed into the bottle from the pump, the piece of wood will float with

• larger part in the water
• lesser part in the water
• same part in the water
• will sink to the bottom

An ice cube of density 900 kg/m^3 is floating in water of density 1000 kg/m^3. The percentage of ice volume which remains outside the water is

• 20 %
• 80 %
• 10 %
• 90 %

A body when floats in water, 1/3rd of its volume remains outside water. When it floats in another liquid, 3/4th of its volume remain outside the liquid . then the density of the liquid is

• 9/4 g/cc
• 8/3 g/cc
• 4 g/cc
• 3/8 g/cc

The weight of an empty balloon on a spring balance is A. The weight becomes B when the balloon is filled with air. Let the weight of air itself be C. Neglect the thickness of balloon when it is filled with air. Also neglect the difference the density of air inside and outside the balloon.

• B < A+ C
• B > A+ C
• B = A+ C
• B < A

A ball of uniform density 2/3 of that of water is dropped freely into a pond from a height 10 m above its surface. the maximum depth the ball can travel in water is

• 21 m
• 10 m
• 20 m
• 30 m

Give the SI unit of density

• kg
• m^2
• kg / m^2
• kg/m^3