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Each material has its own density!
Examples: Solid - water - noble gas
Copper has a density of 8950 kg/m3 = 8.95 kg/dm3 = 8.95 g/cm3.
Water has a density of 1000 kg/m3 = 1000 g/L = 1.000 kg/dm3 = 1.000 kg/L = 1.000 g/cm3 = 1.000 g/mL.
Helium has a density of 0.1785 kg/m3 = 0.1785 g/L = 0.0001785 kg/dm3 = 0.0001785 kg/L =
0.0001785 g/cm3 = 0.0001785 g/mL.
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How can you use density to determine whether an object wil float or sink in a fluid?
If the density of an object is less than the density of the fluid, the object will float. If the density of an object is greater than the density of the fluid, the object will sink. This is because objects with lower density than the fluid displace an amount of fluid equal to their own weight, causing them to float. Objects with higher density displace an amount of fluid less than their own weight, causing them to sink.
What do you notice about the density of sinking objects?
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How is density used to determine if a material will float or sink in a liquid?
Density is used to determine if a material will float or sink in a liquid by comparing the density of the material to the density of the liquid. If the material has a greater density than the liquid, it will sink. If the material has a lower density than the liquid, it will float. Objects float when they displace an amount of liquid equal to their own weight.
An object most likely sink in water if it has low density?
No, an object with low density will likely float in water because it displaces an amount of water greater than its own weight. Objects with high density are more likely to sink because they displace an amount of water less than their own weight.
What must the density of an object be for it to float in water?
The density of an object must be less than the density of water (1 g/cm3) for it to float in water. This means that the object will displace an amount of water equal to its own weight, allowing it to float.
