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Any object that is floating will displace a mass of fluid equal to the mass of the floating object. Since the density of an iceberg is about 90% of the density of seawater most of the iceberg will be under water to create enough buoyancy to support the bit above the water. About 10% will be above the water. Pure ice has a density of about 916.7 kg/m³. Surface seawater has a typical density of about 1027 kg/m³. We can use these figures to work out that 1m³ of ice has a mass of 916.7kg. The amount of seawater that needs to be displaced to support this ice is 916 ÷ 1027 = 0.892m³. Since any object that is floating will displace a mass of fluid equal to the mass of the floating object we know that our 1m³ iceberg will have 0.892m³ under the water and 0.108m³ above the water. i.e. 89.2% underwater and 10.8% above the water. The percentages will be the same for any size iceberg. Since the density of Sea Water can vary and icebergs are not completely pure water there will be a bit of variation from these figures, a figure of 10% is normally used.

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15y ago
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15y ago

Because the density of ice is about 90% the density of sea water. A solid object sinks into a fluid until the fluid it displaces weighs the same as the entire object. That's what floating is. But if it is denser than water, it can never displace enough water to equal it's own weight, so it sinks entirely and falls to the bottom.

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15y ago

The same reason a boat remains mostly submerged. In order for the ice to float, it must displace enough water to be equal to its weight to conteract the effects of gravity and keep it from sinking. Because ice is less dense than water, it is able to displace enough water to stay afloat. The part underwater is displacing a volume of water equal to the weight of the ice. The part that remains above the water is what is left after it has displaced enough to keep it afloat.

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13y ago

An iceberg is made of fresh water (even sea ice is fresh water). When water freezes into ice, it expands and becomes less dense. Therefore it floats up a little until the weight of water it now displaces is equal to its own weight (Archimedes' Principle).

The density of ice is 0.9167 g/cm³ at 0°C and the density of water is 1.0g/cubic cm, whereas water has a density of 0.9998 g/cm³ at the same temperature ( at 4°C liquid water is densest, essentially 1.00 g/cm³ )

(0.9167/0.9998)*100=91.688337668% and this is the parentage of the iceberg that would be beneath the surface in a lake. In sea water (density 1.025g/cm³) the equation is (0.9167/1.025)*100=89.434146341% would be beneath the surface. Thus ice floats on liquid water be it fresh or salt with about 10% of the ice visible above the surface.

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14y ago

actually its on top because ice has density of 0.98 and water has a density of 1.

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14y ago

because the bottom is larger and much heavier

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Q: What percentage of an iceberg is below water and why?
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What percentage is an iceberg underwater?

Typically, only about 10% of any iceberg is above sea-level. This is why we know that the berg that Titanic struck was far larger than the ship.


What percentage of an iceberg can be seen above water?

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Is more of an ice berg under or above?

Though ice is less dense than water but still more of an iceberg is below water due to enormous mass of the iceberg...


Lighter than what you are made of More of you is hidden Than is seen?

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What are icebergs and how it made the Titanic ship broke?

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How big is the tip of a iceberg?

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