Q11 of 81 Page 270

Why is it easier to swim in sea water than in fresh water?

Swimming depends on the upward buoyant force exerted by the liquid on the body. Sea-water is denser than fresh water and hence the buoyant force exerted by it is more. This makes it easier to swim in salt water.


More from this chapter

All 81 →
9

Consider the barometer shown in figure (13-Q1). If a small hole is made at a point P in the barometer tube, will the mercury come out from this hole?


 10

Is Archimedes’ principle valid in an elevator accelerating up? In a car accelerating on a level road?

 12

A glass of water has an ice cube floating in water. The water level just touches the rim of the glass. Will the water overflow when the ice melts?

 13

A ferry boat loaded with rocks has to pass under a bridge. The maximum height of the rocks is slightly more than the height of the bridge so that the boat just fails to pass under the bridge. Should some of the rocks be removed or some more rocks be added?