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yes a ship is made of metal which is denser than water but its hull is filled with air with is extremely less dense than water that makes up for the density of the metal and ends up being less than water.
this site will help alot.

http://www.howstuffworks.com/question254.htm

the ship displaces as much water as it weighs. it floats providing it is not submerged before it displaces this weight.

2006-11-19 15:16:13 · answer #1 · answered by ElDarado05 2 · 0 0

The reason some things float while others sink is because of something called buoyancy. Basically, buoyancy is determined by the amount of liquid that something is displacing with regard to the object's weight. A penny will sink because there is not enough surface area to it to account for the weight (no matter how little the weight may be). A yacht, then, needs enough surface area on the bottom to displace enough water to support its weight. It's somewhat complicated and I'm sure I'm not explaining it well enough, but the answer to your problem is 'buoyancy'. I would check out wikipedia or something for more info.

2006-11-19 15:06:33 · answer #2 · answered by Swtbttrfly 2 · 0 0

understand floor area AND quantity WITH comprehend TO DENSITY. that's a element spoke of as displacement. while the deliver is sitting interior the water, it strikes a definite volume of water out of it is way while it pushes down into the water with its weight. This transfers into stress against the water that's shifting. The water is definitely attempting to circulate returned the place it became into subsequently coming up stress. while the water pushing returned equals the boat pushing down and out, then the boat stops sinking down and floats. So, as long because of the fact the facets of the deliver are tall adequate to nonetheless be above the floor of the water while the boat stops shifting down, the boat will drift. you're able to do this throughout the time of your sink. Fill your sink with water to approximately 0.5 finished. (or 0.5 empty in case you're a pessimist) Then take a medium sized bowl and set it interior the water. without letting the bowl circulate, push down gently into the backside of the bowl. you may experience the water easily pushing the bowl returned up. Or stress of the water resisting the pushing downward. you will detect a bowl that may not tip over, and placed issues in it consisting of cups. upload greater issues progressively, and observe the bowl sinking decrease and decrease because it displaces greater water. at last, the bowl might have too lots weight, the water will come over the facets, and the floating will fail. This stress is the comparable stress you experience once you dive right into a pool. The deeper you circulate, the greater your ears experience it.

2016-12-10 12:09:19 · answer #3 · answered by kluesner 4 · 0 0

it is all about surface tension of water and the displacement of the ship,it weighs tons but floats,saw a guy that made a concrete boat once that floated fine,same principal that a water bug can walk on the water

2006-11-19 15:01:54 · answer #4 · answered by goat 5 · 0 0

The penny sinks because it weighs more than the water it displaces. The boat floats, because the water displaced weighs more than the boat.

2006-11-19 15:01:39 · answer #5 · answered by labs 1 · 1 0

The density of a ship is less dense than ocean, while the penny is denser than the ocean.

2006-11-19 15:01:15 · answer #6 · answered by The Iceman 1 · 0 0

It's because the density of a penny is heavier than water while a ship has density lighter than water

2006-11-19 15:02:55 · answer #7 · answered by hottieheath20042004 2 · 0 0

penny sink exactly b/c it is too small for its weight

if you roll it into a sheet of foil, and shape it like a boat, it will float

if you fill the entire ship with pennies, it will sink too.

2006-11-19 14:52:56 · answer #8 · answered by Anonymous · 0 0

things float becasue they displace an amount of water that weighs more than the item weighs. 1 cubic foot of water weighs 62.4 pounds anything that can take up an equal amount of space and weigh less than 62.4 pounds will float. this concept is also known as specific gravity with water equal to 1.00. Anything with a specific gravity more than 1.0 will sink and anything with a specific gravity of less than 1.0 will float.

2006-11-19 15:00:37 · answer #9 · answered by MrWiz 4 · 1 0

surface area

2006-11-19 14:53:26 · answer #10 · answered by Anonymous · 1 1

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