Advertisements
Advertisements
प्रश्न
A solid of R.D. 4.2 is found to weigh 0.200 kgf in air. Find its apparent weight in water.
Advertisements
उत्तर
Relative density of solid = R.D. = 4.2
Weight of solid in air = W = 0.200 kgf
R.D. = `"Weight of solid in air"/("wt. of solid in air" - "wt. of solid in water")`
Also, wt. of solid in air - Wt. of solid in water = Upthrust
R.D. = `"Wt. of solid in air"/"Upthrust"`
`4.2 = 0.200/"Upthrust"`
Upthrust = `0.200/4.2 = 0.0476` kgf
So, apparent wt. of solid in water = wt. of solid in air - Upthrust
= 0.200 - 0.0476 = 0.1524 ≅ 0.15 kgf
APPEARS IN
संबंधित प्रश्न
The unit of relative density is :
The density of iron is 7.8 x 103 kg m-3. What is its relative 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 stone of density 3000 kgm3 is lying submerged in water of density 1000 kgm3. If the mass of stone in air is 150 kg, calculate the force required to lift the stone. [g = 10 ms2]
A solid of area of cross-section 0.004 m2 and length 0.60 m is completely immersed in water of density 1000 kgm3. Calculate:
- Wt of solid in SI system
- Upthrust acting on the solid in SI system.
- Apparent weight of solid in water.
- Apparent weight of solid in brine solution of density 1050 kgm3.
[Take g = 10 N/kg; Density of solid = 7200 kgm3]
A solid of density 7600 kgm3 is found to weigh 0.950 kgf in air. If 4/5 volume of solid is completely immersed in a solution of density 900 kgm3, find the apparent weight of solid in a liquid.
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.
Calculate the mass of a body whose volume is 2m3 and relative density is 0.52.
A body of volume 100 cm3 weighs 1 kgf in air. Calculate its weight in water. What is its relative density?
