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If it sinks in water then it has a higher density than water.

If it floats on water surface then its density is less than water.

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Q: How do you know whether a substance has a greater density than water?
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An egg sinks in fresh water but floats in a strong solution of salt why?

because following the density principle, the density of the egg compared to the density of the tap water is lesser....(the density principle states that an object or substance with lesser density will float on the surface of the substance or object which has the greater density...).....now,,,with salt,,, salt makes the density of the tap water to increase and increases also the salinity of the water making the egg float because the density of the water with salt is now greater than the density of the egg.... An egg will float when the density of the water is greater than the density of the egg. Adding salt increases the density of a salt water solution. Whether the egg floats or sinks depends on the condition of the egg as well as the amount of salt in the water. If an object is LESS dense than the solution that it is in, then it WILL float. If an object is MORE dense than the solution it is in, then it WILL NOT float. An egg is more dense than regular water; therefore, the egg will sink. But when you add salt to the water, you are making the solution more dense. The salt water's density becomes greater to the point that it is more dense than the egg. Because the egg is now LESS dense than the water, it floats.


Specific gravity is a ratio of the density of a substance to the density of?

Hydrogen monoxide.


Why does density of a substance remain the same for different amounts of the substance?

Density represents mass per volume and so when homogeneous (and incompressible), an amount increase/decrease does not change density, as the mass and volume change in the same proportioning. Water density is 8.34#/cu ft, whether it is 2 cubic feet or 4 cubic feet.


Is the density of 1.00L of water greater than the density of 1.00qt of water?

No. As long as they're at the same temperature.


If the numerator is bigger than the denominator of your density problem will the object float or sink in water?

If your numerator (the mass of the substance) is larger than the denominator (the volume of the substance), then your object will sink because your ratio will be greater than one. Meaning, your volume isn't great enough to displace the fluid in which it rests. Any density less than 1 g/mL floats; any density greater than 1 g/mL will sink.

Related questions

How can you make a substance with greater density greater than water float?

if the substance of the element has greater density you can make it float by carving it out so weight over volume of the object is lighter in effective density


What can you infer about density of a substance floats in water?

You can infer very little about the density of the substance. Ships made of steel, with a density much greater than that of water, can float.


Why is density needed to know whether a substance will float or sink in water?

It's actually pretty easy. If the density of the substance is higher than the density of water, the object will sink. If the density of the substance is lower than the density of water, the object will float. Be aware though that various substances may have dissolved into the water, thus changing its density. For example, seawater has a different density than fresh water.


What is the only substance that has a greater density as a liquid than a solid?

Water has higher density than ice. That is why ice floats on water.


The density of water is equal to 1.0 A substance with density equal to would in water?

It depends on the units you are using for density.Typically, water is thought to have a density of "1" at 4 degrees Celcius. But that is assuming you are using (g/cm3) as your units.Density of water is dependent upon other factors such as impurities in the water as well.


How can density be used to predict whether on object will float you sink in water?

Because that's how life is. If the density is greater than the density of water it will sink. If less, it will float.


Why liter of water is heavier than liter of ethanol?

The density of water is greater than the density of ethanol. This is partly a result of how tightly packed the molecules of the substance are.


What will happen if a substance with a mass density greater than water is placed onto a container if water?

The object will dissolve in the container of water.


Is the density of 8 mL of water greater than equal to or smaller than the density of 4 mL of water?

It depends upon the temperatures and purity of the two quantities of water. If they are both at the same temperature and both have the same purity, they will both have the same density as density does not depend upon the volume, but the substance itself. If they are at different temperatures, or have different purities, then they will have different densities, but which would be greater would depends upon which has which temperature and which purity.


What is meant by relative density of a substance?

The relative density of a substance is defined as the ratio of density of any substance to the density of water at 4 degree celcius.Formula=Density of any substance/Density of water at 4 degree celcius.


How will knowing the density of a substance help you determine whether an object made from that material will slow in water?

I am assuming that you mean float (or sink) rather than "slow". Knowledge of density will not help - unless the object is compact. The density of iron is greater than that of water but ships made of iron will float.


Which has greater density ice or water how can you say that?

Water has a greater density than ice.