Question

Which of the following will sink or float
on water ? (Density of water - 1g cm-³)
(a) Body A having density 500 kg m-3
(b) Body B having density 2528 kg m-³
(c) Body C having density 1100 kg m-³
(d) Body D having density 0.85g cm-³
​

Answer 1

Answer: B & C sink; A&D float

Explanation: since the density of water is 1 kg/m³, B and C have high density, thus they sink whereas A has lesser than it and thus, they float.

In Case of D, density is less than that of water as per given in question and therefore, it floats!

Answer 2

Body A and D will float while body B and C will sink.

Explanation:

The density of water is $1\ g/cm^3$. An object will float or sink it depends on its density. An object having density greater than water will sink while object having density less than water will float.

(a) Density of body A is $500\ kg/m^3=0.5\ g/cm^3$

Its density is less than water, it will float.

(b) Density of body B is $2528 \ kg/m^3=2.528\ g/cm^3$

Its density is more than water, it will sink.

(c) Density of body C is $1100 \ kg/m^3=1.1\ g/cm^3$

Its density is more than water, it will sink.

(c) Density of body D is $0.85\ g/cm^3$

Its density is less than water, it will float.

Hence, body A and D will float while body B and C will sink.

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Density

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