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प्रश्न
What do you understand by the term relative density of a substance?
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उत्तर
The relative density of a substance is the ratio of density of that substance to the density of water at 4°C .
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संबंधित प्रश्न
A sphere of iron and another sphere of wood of the same radius are held under water. Compare the upthrust on the two spheres.
[Hint: Both have equal volume inside the water].
A metal cube of edge 5 cm and density 9 g cm-3 is suspended by a thread so as to be completely immersed in a liquid of density 1.2 g cm-3. Find the tension in thread. (Take g = 10 m s-2)
Complete the following sentence.
S.I. unit of density is .......... .
Complete the following sentence.
Density in kg m-3 = ............ × density in g cm-3
Differentiate between density and relative density of a substance.
The relative density of silver is 10.8. Find its density.
A piece of stone of mass 15.1 g is first immersed in a liquid and it weighs 10.9 gf. Then on immersing the piece of stone in water, it weighs 9.7 gf. Calculate:
- The weight of the piece of stone in air,
- The volume of the piece of stone,
- The relative density of stone,
- The relative density of the liquid.
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 cube of the lead of side 8 cm and R.D. 10.6 is suspended from the hook of a spring balance. Find the reading of spring balance. The cube is now completely immersed in sugar solution of R.D. 1.4. Calculate the new reading of spring balance.
A piece of metal weighs 44.5 gf in air, 39.5 gf in water. What is the R.D. of the metal?
