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प्रश्न
What is meant by pressure? State its S.I. unit.
उत्तर
Pressure is the thrust per unit area of the surface.
Its S.I. unit is 'newton per metre2' or 'pascal'.
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संबंधित प्रश्न
A body experiences the same buoyant force while floating in water or alcohol.
A body floats in a liquid when its weight becomes equal to the weight of the liquid displaced by its submerged part.
Which of the following will sink or float on water? (Density of water = 1 g Cm-3)
body D having density 0.85 g m-3
The density of water is 1.0 g Cm-3. The density of iron is 7.8 × 10″3 g Cm-3. The density of mercury is 13.6 g Cm-3.
Ans the following:
Will a piece of iron float or sink in water?
Explain why an iron needle sinks in water, but a ship made of iron floats on water.
Why is the tip of an allpin made sharp?
Why is a force needed to keep a block of wood inside water?
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.
A homogeneous block floats on water (a) partly immersed (b) completely immersed. In each case state the position of centre of buoyancy B with respect to the centre of gravity G of the block.
Salt water provides less buoyant force than freshwater.
