1.A gold plated silver jewel is of mass 90g and volume 8.3 cubic cm.If the mass of silver is 84g, find the density of gold.take density of silver 10.5g per cubic cm. (20)
2.At what depth below the surface of water will the pressure be equal to two atmospheres, if the atmospheric pressure is 10 to the power 5 Pascal.(10)
3.A rubber ball floats with one-third of its volume above water.calculate the relative density of the ball.(0.67)
4.when 90g of water is mixed with an equal amount of acidity density 1.8g per cubic cm,the density of the mixture becomes 1.5g per cubic cm.Calculate the decrease in volume.(20)
5.In a mixture of 100g , two liquids are mixed in the ratio 1:3 of their masses.If their densities are 1.25g/cm3 and 0.6g/cm3 respectively,find the density of the mixture.(0.689)
6.A solid body weighs 2.10N in air.Its R.D is 8.4.How much will the body weigh if placed in
A) water
B)a liquid of R.D 1.2 ? (1.85,1.8)
7.A small stone of mass m=200g is held under water in a tall jar and allowed to fall.
A) calculate the net force acting on the stone.
B) calculate it's acceleration as it falls through water. Neglect the force due to viscosity.take the volume of stone as 80 cubic cm, density of water as 1.0g/cm3 & the acceleration due to gravity, g=10m/s.s (1.2N,6m/s2)
2.At what depth below the surface of water will the pressure be equal to two atmospheres, if the atmospheric pressure is 10 to the power 5 Pascal.(10)
3.A rubber ball floats with one-third of its volume above water.calculate the relative density of the ball.(0.67)
4.when 90g of water is mixed with an equal amount of acidity density 1.8g per cubic cm,the density of the mixture becomes 1.5g per cubic cm.Calculate the decrease in volume.(20)
5.In a mixture of 100g , two liquids are mixed in the ratio 1:3 of their masses.If their densities are 1.25g/cm3 and 0.6g/cm3 respectively,find the density of the mixture.(0.689)
6.A solid body weighs 2.10N in air.Its R.D is 8.4.How much will the body weigh if placed in
A) water
B)a liquid of R.D 1.2 ? (1.85,1.8)
7.A small stone of mass m=200g is held under water in a tall jar and allowed to fall.
A) calculate the net force acting on the stone.
B) calculate it's acceleration as it falls through water. Neglect the force due to viscosity.take the volume of stone as 80 cubic cm, density of water as 1.0g/cm3 & the acceleration due to gravity, g=10m/s.s (1.2N,6m/s2)
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