Q7 of 49 Page 9

When does the maximum loss in weight of an object immersed in water take place? Illustrate.

The maximum loss in weight of an object takes place when it is fully immersed in a liquid. Consider a body immersed in a liquid. Greater the volume of an object immersed in a liquid, greater is the decrease in the apparent weight of the object and it seems to become more and more lighter. But once the object is completely immersed under the liquid, then further lowering it in liquid does not made it any more lighter. This means that the maximum loss in weight of an object takes place when it is fully immersed in liquid.

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5 Define the force of friction. 6 How do ball- bearings affect the nature of friction? Illustrate with an example. 8 If two equal weights of unequal volumes are balanced in air, what will happen when they are completely dipped in water? 9 Two different objects are completely immersed in water and undergo the same loss in weight. Is it necessary that their weights in air should also be the same? Explain.