Advertisements
Advertisements
प्रश्न
What is the other name of buoyant force ?
उत्तर
Buoyant force is also known as upthrust.
APPEARS IN
संबंधित प्रश्न
Name the force which makes heavy objects appear light when immersed in a liquid.
A body while floating sinks deeper in a liquid of low density than in a liquid of high density.
Define the term Density of a substance.
How is the unit bar related to the S.I. unit pascal?
The pressure P1 at a certain depth in river water and P2 at the same depth in sea water are related as :
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.
A body experiences an upthrust F1 in river water and F2 in sea water when dipped up to the same level. Which is more, F1 or F2? Give reason.
Complete the following sentence :
A piece of wood is held under water. The upthrust on it will be ___________ the weight of the wood piece.
Figure shows the same block of wood floating in three different liquids A, B and C of densities ρ1, ρ2 and ρ3 respectively. Which of the liquid has the highest density? Give a reason for your answer.
A beaker contains a liquid of density ‘ρ’ up to height ‘h’ such that ‘PA’ is atmospheric pressure and ‘g’ is the acceleration due to gravity. Answer the following questions:
- What is the pressure on the free surface of the liquid?
- What is the pressure on the base of the beaker?
- What is the lateral pressure at the base on the inner walls of the beaker?
