- #1

Callmelucky

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- Homework Statement
- If we throw empty but sealed glass bottle in water it will float with 60% of it's volume above surface of water.

What is average density of floating bottle and what is it's volume? Mass of bottle is 0.4 kg(mass of air inside of bottle is irelevant).

- Relevant Equations
- density = mass / volume

If we throw empty but sealed glass bottle in water it will float with 60% of it's volume above the surface of water.

What is average density of floating bottle and what is it's volume? Mass of bottle is 0.4 kg(mass of air inside of bottle is irelevant).

It's easy problem but I can't get right solution.

40% of bottle is under water, so density of bottle is 400 kg/m3. Therefore the volume of is 0.4 kg / 400 kg/m3 = 1dm3 = 1L.

But the answer at the end of textbook for density is 392 kg/m3.

Can someone please tell me where I am wrong?

Thank you.

What is average density of floating bottle and what is it's volume? Mass of bottle is 0.4 kg(mass of air inside of bottle is irelevant).

It's easy problem but I can't get right solution.

40% of bottle is under water, so density of bottle is 400 kg/m3. Therefore the volume of is 0.4 kg / 400 kg/m3 = 1dm3 = 1L.

But the answer at the end of textbook for density is 392 kg/m3.

Can someone please tell me where I am wrong?

Thank you.