Wed November 23, 2011 By:

Q.1. A solid of mass 150g and volume 250 cm3 is placed in water. Will it float or sink in water ? Density of water is 1g/cm3 . Also find the weight of water displaced by it

Expert Reply
Wed November 23, 2011
An object will float in water if its density is less than the density of water and sink if its density is greater that that of water.
Object density = mass/volume = 150/250 = 3/5 g/cm3
So, object density is less than water density so it will float in water.
The Archimedes' principle states that the volume of the displaced water is equal to the volume of an immersed object.
Volume of displaced water = 250 cm3
Weight of water displaced = volume * density = 250 * 1 = 250 gm
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