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प्रश्न
The S.I. unit of density is ..........
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उत्तर
The S.I. unit of density is Kg m-3
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संबंधित प्रश्न
Name the force which makes heavy objects appear light when immersed in a liquid.
What causes buoyant force (or upthrust) on a boat ?
Pressure at the free surface of a water lake is P1, while at a point at depth h below its free surface is P2. (a) How are P1 and P2 related? (b)Which is more P1 or P2?
Complete the following sentence :
Pressure at all points at the same depth is ....................
The pressure P1 at the top of a dam and P2 at a depth h form the top inside water (density p) are related as :
- Calculate the height of a water column which will exert on its base the same pressure as the 70 cm column of mercury. Density of mercury is 13.6 g cm-3.
- Will the height of the water column in part (a) change if the cross-section of the water column is made wider?
The mass of a block made of certain material is 13.5 kg and its volume is 15 × 10-3 m3.
(a) Calculate upthrust on the block if it is held fully immersed in water.
(b) Will the block float or sink in water when released? Give a reason for your answer.
(c) What will be the upthrust on block while floating?
Take density of water = 1000 kg m-3.
What is the centre of buoyancy? State its position for a floating body with respect to the centre of gravity of the body.
What do you mean by buoyancy?
Most buoyant objects are those with relatively ______.
- high volume
- higher mass
- low density
- less viscosity
