2007-01-23 01:43:28 · 8 answers · asked by norwood 1 in Science & Mathematics ➔ Physics
False. An object will float if it's density is any less than water.
2007-01-23 01:53:22 · answer #1 · answered by Anonymous · 2⤊ 0⤋
Floating is not function of density but of buoyancy. Because both density and buoyancy are dependant on the mass of an object. there is a relationship between the two which is the root of your question. But keep in mind things made of materials more dense than water can also float, like a steel aircraft carrier.
So what is buoyancy? The buoyant force is equal to the weight of water displaced by the object, if this force is greater than the weight of the object, the object floats. With that understood if the material is less dense than water it can't possibly weigh more than the water displaced regardless of it's shape and will float.
So the answer is true but the object needs to be only marginally less dense than the water not half the density of water.
Now for the aircraft carrier, since it's hollow it displaces much more water than the steel alone, by virtue of it's shape. Therefore the buoyant force achieved is greater than that of a steel block.
2007-01-23 05:12:12 · answer #2 · answered by Brian K² 6 · 1⤊ 0⤋
An Object will float if its density is equal ( =1) or less than water density (<1).
2007-01-23 01:48:58 · answer #3 · answered by Anonymous · 0⤊ 2⤋
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Densit means mass/volume.The bodies with less density than water will float,the bodies with same density as water will just sink i.e. they will touch the surface under the water.The bodies with more density that water will sink. Bodies having more mass and less volume will obviously have more density so they sink Bodies havind more volme and lees mass will have less density so they float
2016-04-04 06:25:37 · answer #4 · answered by Anonymous · 1⤊ 0⤋
false. If the density is anything less than water it will float, but if its close to the density of water it will hover under the water some (like a submarine)...
2007-01-23 01:53:57 · answer #5 · answered by jsygrovehpi 3 · 0⤊ 2⤋
In some cases an object can float in water if its density is greater than water: consider floating a needle on water by placing it very carefully on the surface.
2007-01-23 01:51:55 · answer #6 · answered by bruinfan 7 · 0⤊ 4⤋
True - and only 50% or less of the object will be submerged.
If the weight of the volume of water that an object displace >= the weight of the object, the object will float. (Pythagoras I think)
2007-01-23 01:58:51 · answer #7 · answered by Francois J V 2 · 0⤊ 2⤋
true
2007-01-23 01:51:44 · answer #8 · answered by al b 5 · 0⤊ 3⤋