A huge ship floats in water, but a small coin sinks. Why?
Answers
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Archimedes' buoyancy principle states that buoyant force -- what keeps the ship afloat -- is equal to the weight of water that is displaced when the ship enters the ocean. ... The displaced water around a coin weighs less than the coin, so the coin will sink.
Answer: Note it down please
Explanation:
Displacement.The boat floats because the hull is constructed as a shell to hold people and cargo. As the boat is loaded it sinks deeper into the water. The water that is “pushed” out of the way is the displacement. The “water line” of a boat is where it stops sinking into the water. In commercial ships they paint a Plimsoll line, along the side of the ship where the water line is and for heavier and heavier loads as the ship sinks into the water. This sets the safety limit for maximum cargo according to different sea conditions.
Density. An object’s weight per unit of volume is called the density. Heavy things that are denser will sink in water, like your coin.
Lighter things that are less dense will float, like a swimming safety jacket.
Surface Tension. This also makes some things float. A leaf floats on water until it gets entirely wet and then sinks.
An insect can “walk” on water because of the surface tension is not broken by his tiny feet.
Surface tension is a bit more complicated. All liquids have their molecules moving about. This creates a “pressure” in the liquid equal in all directions. Upward pressures unable to continue at the surface then reach sideways and create a small cohesive transition barrier between the water and the air, a sort of skin that small things appear to float on.