Answers

2016-04-03T10:08:36+05:30
According to Archimedes principle a body floats on water because the displacement of water by its volume is more than  its mass - flotation
opposite to this is sinking.
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2016-04-03T10:20:20+05:30
an object float or sink in water due to many reason's such as : 
1. density of the object 
2. relative density of the object 
3. buoyant force 
4. atmospheric pressure 
5. Archimedes laws like the force of the body i.e. gravitational force and even buoyant force  
therefore with the help of these 5 sentences we can determine whether the object float or sink in water.  
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