Physics

# How does the density of an object floating on a fluid compare to the density of the fluid?

012 ###### 2011-04-10 03:52:36

A floating object is less dense than the fluid in which it's floating.

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## Related Questions The density of an object is related to the density of the fluid it is in because if the density of the object is less than the fluid than it will float. If this density of the object is greater than the density of the fluid it will sink to the bottom.  An object will float if it has less density than the fluid in which it is placed; if the object has more density, it will sink. If an item floats, Then it is less dense than the liquid it floats in. One can prove this using bernoulli's equation. To determine the weight of the floating object, take the volume of water displaced by the portion of the object below the fliud surface then multiply that by the density of the fluid. This process gives you the bouyant force on the floating object and therefore the weight. Then take that weight and divide it by the total volume of the. Object to get its density. Also note that if an item is suspended below the surface but. Above the bottom of the fluid body, then the item and fluid have equal density. If the item sinks to the bottom it has higher density than the fluid. An object will float if it has less density than the fluid it is placed in. Floating is the result of the fact that there is a higher pressure at the bottom of the floating object, than at the top. The denser the object, the more fluid it will have to displace. In order to float it must displace more weight in fluid than the object weighs The weight of the object cannot be determined with the given information. The density of the floating object must be determined in order to solve for its weight. According to Archimedes' principle, the weight of an object in a fluid is equal to the quotient of the density of the object and the density of the fluid multiplied by the weight of the fluid displaced. Assuming that the density of water is equal to 1g/cm3, then, (The Weight of the Object) = (The Density of the Object) x 10 When you have the density of both the object and the fluid, just see which has a higher density. If the object has a higher density than the fluid, the object will sink. If the object has a lower density than the fluid, the object will float. The "AVERAGE" Density of the entire floating object must be LESS than the density of the Fluid. The Average Density includes hollow spaces, etc. That is why a ship made of STEEL can float in water. It has a lot of EMPTY (air filled) space contained in its interior. Therefore, when the Steel Hull is immersed in the water it "DISPLACES" more water weight than the entire ship itself weighs. density of the object &lt; density of the fluid Whenever the density of the object is greater than the density of the fluid. An object would float on a fluid if the density of the object was less than the density of the fluid. True ~ Apex The answer is right there in the question. The density of any floating object is less than that of the fluid in which it floats. The object's density.If less than the density of the fluid, the object floats.If more than the density of the fluid, the object sinks. buoyancy force is the upward thrust (force) applied by a fluid(liquid , gas) on any object completely or partially submerged in it.. it depends upon the density of object and fluid love.........razor If an object sinks in a fluid then it has a density greater than the fluid. This assumes the object is solid and not shaped like a boat. An object that sinks into a fluid has higher density than the fluid. it is the density of a fluid (the operation for finding the density of an object is mass divided by volume) To know this you first need to find the density of the object and the density of the fluid on which the the object shall be kept. If the density of the fluid is more than the object's density then the object will float. The object will sink if the reverse happens. If you can determine the volume fractions of the object that are above and below the water, then you can find the density of the object by multiplying the density of the fluid it floats in by the fraction of the volume that is below the surface of the liquid. Another, more complex way is to weigh the object alone then attach it to one arm of a balance to weigh the object when it is floating. As it floats it will displace an amount of liquid equal in weight to the total object. The decrease in weight will be proportional to the fraction of the object that is submerged. As an example: If an object weighed 100 grams out in the air but only required 20 grams to counterbalance its weight when it is floating, and the fluid it was floating in was water, then the density of the object would be (1 g/cubic centimeter)&middot;(100-20)/100 = 0.8 g/cubic centimeter.  Buoyancy is the force a fluid exerts on object. If the density of an object is greater than that of the fluid in which it is placed, it will sink unless it's shape gives it an average density that is less than the fluid, like a boat. The density of an object that sinks is greater than the density of the liquid in which it sinks. The effect of buoyancy is to reduce the apparent weight of the object when it's introduced into a fluid. Depending on the density of the object compared to the density of the fluid, the object's apparent weight could be reduced to zero (beach ball floating in the pool), or even to a negative value (helium party balloon heading for the sky). Sinking or floating is determined by the density of the liquid and the density of the object. Density is mass/volume. When you place an object in a liquid, a certain amount of volume is displaced by the object. If that object puts more mass into the volume displaced than what the original mass was of the liquid in that volume was, then the object will sink. Therefore an object that is more dense than a liquid will sink.

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