Advertisements
Advertisements
प्रश्न
A test tube loaded with lead shots weighs 25 gf and floats upto the mark X in water. When the test tube is made to float in brine solution, it needs 5 gf more of lead shots to float upto level X. Find the relative density of brine solution.
Advertisements
उत्तर
When test tube floats is water:
Weight of test tube = 25 gf
By law of floatation
Weight of water displaced = Weight of test tube = 25 gf
When test tube floats in a brine solution, it needs 5 gf more of lead shots to float up to same level as in water.
Weight of test tube = 25 + 5 = 30 gf
By law of floatation :
Weight of brine solution displaced = Weight of test tube = 30 gf As, volume of brine solution displaced = Volume of water displaced
∴ R.D. of brine solution = `"Weight of brine solution displaced"/"Weight of water displaced"`
`= 30/25 = 1.2`
APPEARS IN
संबंधित प्रश्न
A body is held immersed in a liquid. (i) Name the two forces acting on the body and draw a diagram to show these forces. (ii) State how the magnitudes of two forces mentioned in part (i) determine whether the body will float or sink in liquid when it is released. (iii) What is the net force on the body if it (a) sinks and (b) floats?
A body of volume V and density ρs , floats with volume v inside a liquid of density ρL. Show that `"v"/V = ρ_s/ρ_L` .
An iron nail sinks in the water while an iron ship floats on water. Explain the reason.
For a floating body, its weight W and upthrust FB on it are related as :
A body of weight W is floating in a liquid. Its apparent weight will be
A test tube loaded with lead shots, weighs 150 gf and floats upto the mark X in water. The test tube is then made to float in alcohol. It is found that 27 gf of lead shots have to be removed, so as to float it to level X. Find R.D. of alcohol.
Why does a ship make of iron not sink in water, while an iron nail sinks in it?
Explain the following:
An egg sinks in fresh water but floats in a strong solution of salt.
How does an object’s density determine whether the object will sink or float in water?
Hydrometer is based on the principle of ______.
