Advertisements
Advertisements
प्रश्न
Explain why a gas bubble released at the bottom of a lake grows in size as it rises to the surface of the lake.
Advertisements
उत्तर
The reason is that when the bubble is at the bottom of the lake, total pressure exerted on it is the atmospheric pressure plus the pressure due to water column. As the gas bubble rises, due to decrease in depth the pressure due to water column decreases. By Boyle's law, PV = constant, so the volume of bubble increases due to decrease in pressure, i.e., the bubble grows in size.
APPEARS IN
संबंधित प्रश्न
What is the other name of buoyant force ?
Relative density of a substance is expressed in g cm-3.
Write an expression for the pressure at a point inside a liquid. Explain the meaning of the symbols used.
A dam has broader walls at the bottom than at the top. Explain.
Two cylindrical vessels fitted with pistons A and B of area of cross-section 8 cm2 and 320 cm2 respectively are joined at their bottom by a tube and they are completely filled with water. When a mass of 4 kg is placed on piston A, Find:
- the pressure on piston A,
- the pressure on piston B, and
- the thrust on piston B.
Why is a force needed to keep a block of wood inside water?
A piece of wood if left under water comes to the surface. Explain the reason.
How is the upthrust related to the volume of the body submerged in a liquid?
Select the correct option.
The unit Nm2 is the unit of
How is thrust different from pressure?
