A solid weighs 80g in air and 64g in water .calculate the relative density of solid. State if object would sink or float if kept in water

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Answers

2016-03-14T20:45:08+05:30
relative density = weight in air / weight in air -weight in water

R.D = 80/80-64
R.D = 80/16 
R.D = 5
now,
density of water = 1 g/cm³
so the object would sink .

i hope it helps.............. 
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2016-03-14T22:30:18+05:30
According to Archimedes principle,
Upthrust = Weight of liquid displaced
Weight of water displaced = 80-64 = 16

Now, density of water = 1g/cm³
1 g/cm³ = 16 g / x cm³
Therefore, volume of water displaced =
x = 16 cm³

So, volume of the solid = 16 cm³

It density = Mass/volume = 80/16 = 5 g/cm³

Relative density = Density of solid /Density of water = 5/1 = 5

Now, since the solid's density is more than water, it will sink in water.
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