Advertisements
Advertisements
Question
Describe an experiment to show that a body immersed in a liquid appears lighter than it really is.
Advertisements
Solution
Experiment to show that a body immersed in a liquid appears lighter:
Take a solid body and suspend it by a thin thread from the hook of a spring balance as shown in the above figure (a). Note its weight. Above figure (a) shows the weight as 0.67 N.
Then, take a can filled with water. Immerse the solid gently into the water while hanging from the hook of the spring balance as shown in figure (b). Note its weight. Above figure (b) shows the weight as 0.40 N.
The reading in this case (b) shall be less than the reading in the case (a), which proves that a body immersed in a liquid appears to be lighter.
APPEARS IN
RELATED QUESTIONS
A body X sinks in water, but a body Y floats on water. The density of the body X is ......... than the density of body Y.
The weight of a body floating in a liquid is ........
When a boat is partially immersed in water, it displaces 600 kg of water. How much is the buoyant force acting on the boat in newtons ? (g = 10 m s-2)
What is the law of floatation?
Describe a simple experiment to demonstrate that a liquid enclosed in a vessel exerts pressure in all directions.
Explain why a gas bubble released at the bottom of a lake grows in size as it rises to the surface of the lake.
Complete the following sentence :
Pressure is .................... in all directions about a point in a liquid.
Complete the following sentence :
Two balls, one of iron and the other of aluminium experience the same upthrust when dipped completely in water if _____________ .
A balloon filled with helium gas floats in a big closed jar which is connected to an evacuating pump. What will be your observation, if air from the jar is pumped out? Explain your answer.
A body will sink if the weight of the body is greater than the buoyant force.
