Advertisements
Advertisements
प्रश्न
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.
उत्तर
Observation : The balloon will sink.
Explanation : As air is pumped out from jar, the density of air in jar decreases, so the upthrust on balloon decreases. As weight of balloon exceeds the upthrust on it, it sinks.
APPEARS IN
संबंधित प्रश्न
What is meant by the term ‘buoyancy’ ?
A body while floating sinks deeper in a liquid of low density than in a liquid of high density.
Distinguish between density and relative density.
Which of the following will sink or float on water? (Density of water = 1 g Cm-3)
body D having density 0.85 g m-3
For a floating body, how is its weight related to the buoyant force?
For a given object, the buoyant force in liquids of different ______ is ______.
Differentiate between thrust and pressure.
Explain the following statement:
It is easier to cut with a sharp knife than with a blunt one.
A piece of wood if left under water comes to the surface. Explain the reason.
Write about buoyant force.
