# Why only around 11% of an iceberg is above water, while the rest of ice is hidde

1. 84
flyskyposted 5 years ago

Why only around 11% of an iceberg is above water, while the rest of ice is hidden?

Hint: the density of see water is 1030 kg/m3, the density of ice is 920 kg/m3.

2. 61
Glassoposted 5 years ago

Floating objects displace amount of fluid equal mass of floating object. This creates enough buoyancy to keep an object afloat. Since the density of iceberg is about 90% of seawater density, approximately 90% of iceberg will be under water in oredr to displace enough water.

3. 84
flyskyposted 5 years ago

Great explanation Glasso! It is worth mentioning that this fact is described by the Archimedes's principle. In this particular case, buoyant force Fb acting on around 90% of the iceberg balances gravity force Fg on the iceberg. More precisely, from Fb = Fg if follows ρ * g * (V / x) = m * g where is the density of water, g gravitational acceleration, V is the volume and m mass of the iceberg. A short calculation gives result.

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