Advertisements
Advertisements
प्रश्न
What do you mean by buoyancy?
Advertisements
उत्तर
All liquid exerts a upward force on the body placed in it. This Phenomenon is called buoyancy.
APPEARS IN
संबंधित प्रश्न
In which direction does the buoyant force on an object due to a liquid act ?
The density of aluminium is 2.7 g cm-3 and that of brass 8.4 g cm’3. The correct statement is
What is the cause of buoyant force ?
Explain the meaning of the statement
‘Relative density of aluminium is 2.7’.
How does the pressure exerted by a solid and fluid differ?
How does the liquid pressure on a diver change if:
the diver moves to the greater depth
(i) The diameter of neck and bottom of a bottle are 2 cm and 10 cm, respectively. The bottle is completely filled with oil. If the cork in the neck is pressed in with a force of 1.2 kgf, what force is exerted on the bottom of the bottle?
(ii) Name the law/principle you have used to find the force in part (a).
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.
Complete the following sentence :
A piece of wood is held under water. The upthrust on it will be ___________ the weight of the wood piece.
Higher Order Thinking Skill.
How does a fish manage to rise up and move down in water?
