Advertisements
Advertisements
Question
A solid lighter than water is found to weigh 7.5 gf in air. When tied to a sinker the combination is found to weigh .If the sinker alone weighs 72.5 gf in water, find R.D. of solid.
Advertisements
Solution
Weight of solid in air = 7.5 gf
Weight of sinker in water = 72.5 gf
Wt. of sinker in water + Wt. of solid in air
= 72.5 + 7.5 = 80.0 gf …(1)
Wt. of solid in water + Wt. of sinker in water = 62.5 gf …(2)
Subtract eq. (1) from eq. (2)
Wt. of solid in air – Wt. of solid in water = 80- 62.5 = 17.5 gf.
∴ R.D. of solid = `"Weight of solid in air"/("Wt. of solid in air" - "Wt. of solid in water")`
`= 7.5/17.5 = 0.428`
APPEARS IN
RELATED QUESTIONS
A body dipped into a liquid experiences an upthrust. State two factors on which upthrust on the body depends.
The density of copper is 8.83 g cm-3. Express it in kg m-3.
Explain the following :
Toy balloons filled with hydrogen rise to the ceiling, but if they are filled with carbon dioxide, then they sink to the floor.
Explain the following :
A ship submerges more as it sails from sea water to river water.
Select the correct option:
With the increase in the density of the fluid, the upthrust experienced by a body immersed in it:
Write the SI units of Density
Write the SI units of Relative density
If 2/3rds of a piece of wood submerges in water and 3/4ths of the same piece of wood submerges in oil. Find the density of the oil.
Complete the following result:
The density of water is ______ Kgm-3.
