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प्रश्न
Complete the analogy.
Downward force: Weight:: Upward force offered by liquid: _____
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उत्तर
Downward force: Weight:: Upward force offered by liquid: Buoyant force.
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संबंधित प्रश्न
What is the scientific name of the 'upward force' acting on an object immersed in a liquid?
When does an object float or sink when placed on the surface of a liquid ?
Which of the following will sink or float on water? (Density of water = 1 g Cm-3)
(a) body A having density of 500 kg m-3
How is the unit bar related to the S.I. unit pascal?
How does the pressure exerted by a solid and fluid differ?
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.
Define upthrust and state its S.I. unit.
Two spheres A and B, each of volume 100 cm3 is placed on water (density = 1.0 g cm−3). The sphere A is made of wood of density 0.3 g cm−3 and sphere B is made of iron of density 8.9 g cm−3.
- Find:
- The weight of each sphere, and
- The upthrust on each sphere.
- Which sphere will float? Give reason.
Is pressure a vector quantity?
Most buoyant objects are those with relatively ______.
- high volume
- higher mass
- low density
- less viscosity
