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प्रश्न
Define the term density.
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उत्तर
The density of a substance is its mass per unit volume.
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संबंधित प्रश्न
A piece of brass weighs 175 gf in air and 150 gf when fully submerged in water. The density of water is 1.0 g cm-3.
(i) What is the volume of the brass piece? (ii) Why does the brass piece weigh less in water?
What are the units density in (i) C.G.S. and (ii) S.I. system .
Complete the following sentence.
Density of water is .... ... kg m-3.
A body weighs W gf in air and W1 gf when it is completely immersed in water. Find: (i) Volume of the body, (ii) Upthrust on the body and (iii) Relative density of the material of the body.
How does the density ρs of a substance determine whether a solid piece of that substance will float or sink in a given liquid ρL?
A wooden block floats in water with two-third of its volume submerged.
(a) Calculate the density of wood.
(b) When the same block is placed in oil, three-quarters of its volume is immersed in oil. Calculate the density of oil.
A hollow cylinder of copper of length 25 cm and area of cross-section 15 cm2, floats in water with 3/5 of its length inside water. Calculate:
(1) apparent density of a hollow copper cylinder.
(2) wt. of cylinder.
(3) extra force required to completely submerge it in water.
An inflated balloon is placed inside a big glass jar which is connected to an evacuating pump. What will you observe when the evacuating pump starts working? Give a reason for your answer.
A body of mass 50 g is floting in water. What is the apparent weight of body in water? Explain your answer.
Select the correct option:
With the increase in the density of the fluid, the upthrust experienced by a body immersed in it:
