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It's greater than the density of the surrounding fluid medium. For example, a balloon filled with air sinks in air -- falls to the ground -- but floats in water. For water-tight objects, it is the average density that matters. The buoyant force acting on an object submerged in water is equal to the weight of the water displaced by the object. If the object weighs more than the weight of the water it displaces, it will sink, because the buoyant force will be less than the object's true weight. If it weighs less than the weight of the water displaced, it will float. If it weighs exactly the same as the water it displaces, it is said to have neutral buoyancy and will appear to be and behave as if it were weightless. In other words, its apparent weight will be zero. As discussed in the previous paragraph, if a submerged object sinks, we know it weighs more than the water it displaced. We can therefore conclude that it is denser than water.
Wiki User
∙ 16y ago
Wiki User
∙ 14y agoFor something to sink in water, the volume of water it displaces (in cm^3) must be greater to the objects total mass of the object. Assuming the whole object is submerged, it just has to have a density of 1g/cm^3 or 1g/mL.
Wiki User
∙ 14y agoThe object can have any density that is higher than the density of water. (Density of water: 1g/mL)
Wiki User
∙ 13y agoDense enough for its weight to be greater than the water's buoyancy force.
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Why do some objects float or sink in water?
It depends on the density of an object. If the density is higher than the density of the liquid, the it sink. If it's less, it floats.
Why do some objects float and others dont?
Because some objects are a lot denser than water so the sink and others are less denser so they float
Why is it incorrect to say that heavy objects sink in water?
It is incorrect to say that heavy objects sink in water because... A big slab of wood is heavy, right? Wood floats. For one example.
Why does some food float and some food not?
Whether an object floats or not depends on its density. Density is the amount of mass in a volume, or mass divided by volume. If and object's density is less than that of water, it will float in water, and if an objects density is higher than that of water, it will sink in water. raw material (fishballs will sink down);but it will floats when it is cook. why
Charlie is testing whether thing swim sink or float he put a plastic-foam board in the water predict whether the board will sink or float.explain your reasoning put a plastic-foam?
Water has a density of about 1.0, knowing this you can tell if an object will sink or float by calculating the objects density.
How do objects sink or float in water?
objects with higher density than water sink, ones with a lower density float
An object most likely sink in water if it has low density?
The lower an objects density the less likely it is to sink in water. Objects with a higher density than water will sink if placed in it while objects with a lower density than water will float if placed in it.
Why the objects sink?
Objects sink when the density of the object is more than that of the water.
Why do objects sink when placed in water?
Only objects having a density higher than the density of a liquid sink.
Why objects float or sink when placed on surface of water?
Because of the comparative density. If the objects density is greater than water it will sink, if less then it will float.
What objects that sink in water?
the objects whose density is more than that of fluid sink in the liquid
How do objects sink or float?
Objects sink or float depending on their Mass and density. If the object has a Density LOWER than water, it will float. Higher than water will sink. You can find density by multiplying its Mass times its Volume, there you have its density. Water has a Density of 1, things with lower may sink, only slightly if there isn't much difference.
Which things float on water and which sinks into it?
Objects whose aggregate density is less than the density of water float in it. Objects whose aggregate density is greater than the density of water sink in it.
Why do some objects float or sink in water?
It depends on the density of an object. If the density is higher than the density of the liquid, the it sink. If it's less, it floats.
does a coin sink or float?
The reason the pennies sink in water is because of an idea called density. The pennies have more density than the water, and so the pennies sink. Anything with more density than water will sink in water, but other objects that have less density than water will float.
Will an object sink in water if it has a high density?
It will sink if its density is higher than the water's density, typically 1.0 gm/cm³. Exceptions are very small objects that cannot break the surface tension of water and objects that are shapes such that water is excluded from their interior (ships).
Hoe does an objects density determine whether the object will sink?
If an objects density is less than the density of what it is put in it will float. If the objects density is greater it will sink.
