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प्रश्न
Explain the following:
A hydrometer is made heavy near the bottom.
उत्तर
The bottom of the hydrometer is made heavier by loading it with lead shots so that it floats vertically with some of its portion outside the surface of the water in the jar.
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संबंधित प्रश्न
A body is held immersed in a liquid. (i) Name the two forces acting on the body and draw a diagram to show these forces. (ii) State how the magnitudes of two forces mentioned in part (i) determine whether the body will float or sink in liquid when it is released. (iii) What is the net force on the body if it (a) sinks and (b) floats?
A body of volume V and density ρs , floats with volume v inside a liquid of density ρL. Show that `"v"/V = ρ_s/ρ_L` .
Why is the floating ice less submerged in brine than in water?
Explain the following :
Icebergs floating in sea are dangerous for ships.
For a floating body, its weight W and upthrust FB on it are related as :
What fraction of metal of density 3400 kgm-3 will be above the surface of mercury of density 13600 kgm-3, while floating in mercury?
Why does a ship make of iron not sink in water, while an iron nail sinks in it?
Explain the following:
An egg sinks in fresh water but floats in a strong solution of salt.
Explain the following:
Icebergs floating in the sea are very dangerous for ships.
State the laws of flotation.
