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Question
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Solution
Relative density = density of substance/density of water at 4°C.
As the relative density of platinum is 21.50, this means platinum is 21.5 times denser than water at 4°C.
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RELATED QUESTIONS
A body of volume V and density ρ is kept completely immersed in a liquid of density ρL. If g is the acceleration due to gravity, then write expressions for the following:
(i) The weight of the body, (ii) The upthrust on the body,
(iii) The apparent weight of the body in liquid, (iv) The loss in weight of the body.
Complete the following sentence.
Density in kg m-3 = ............ × density in g cm-3
A body weighs W1gf in air and when immersed in a liquid it weighs W2gf, while it weights W3gf on immersing it in water. Find:
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- upthrust due to liquid
- relative density of the solid
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Relative density of a substance is expressed by comparing the density of that substance with the density of :
The density of iron is 7.8 x 103 kg m-3. What is its relative density?
A body weighs 20 gf in air and 18.0 gf in water. Calculate the relative density of the material of the body.
A solid weighs 120 gf in air and and 105 gf when it is completely immersed in water. Calculate the relative density of solid.
A solid of R.D. = 2.5 is found to weigh 0.120 kgf in water. Find the wt. of solid in air.
An iceberg floats in sea water of density 1.17 g cm 3, such that 2/9 of its volume is above sea water. Find the density of iceberg.
A piece of wax floats in brine. What fraction of its volume will be immersed?
R.D. of wax = 0.95, R.D. of brine = 1.1.
