Density is a ratio of mass to volume. Relative density is a comparison of the density of two or more things.For example: What is the relative density of the two balls and water in the diagram? Ball A sinks in the water, thus the density of ball A is greater than the density of water. […]
Changing Density Units
Density is a type of conversion factor that compares the mass of a specific volume. The basic metric unit for mass is gram, g.The basic metric unit for length is meter, m.The basic metric unit for volume is L or m 3. Use the density of calcium, Ca, found at Dynamic Periodic TableConvert the units of […]
Floating
Why Do Some Heavy Objects Float and Other Heavy Objects Sink? New Terms buoyancy buoyant force density displacement fluid volume Whether an object sinks or floats in a fluid (liquid or gas), depends on several variables: 1. The density of the object in a fluid. (Density is the ratio of the object’s mass […]
Archimedes: I.D.s Gold
Before the Greek mathematician and inventor Archimedes (C.287-212 B.C.), nobody knew why some things float and others don’t. It is said that Archimedes’ king gave a silversmith a certain amount of gold to make him a new crown. When the crown was finished, the king asked Archimedes to figure out a way to secretly decide […]
How to Date Eggs
The older an egg is the more buoyant it is in water. Buoyancy is the ability of an object to float in a fluid (liquid or gas). For example, helium balloons are buoyant in air and boats are buoyant in water. To test the freshness of an egg, fill a bowl with water. Then place […]