The reason things float or sink in water is due to the object's or material's density. The density of water is 1.0 grams per cubic centimeter at 68 degrees Fahrenheit. Objects that have a lower density than water will fl... More »

A boat floats because the weight of the water it displaces is less than the weight of the boat itself. When an object is placed in a fluid in gravity, both the fluid and the object are pulled downward, but because the ob... More »

Ice cubes float in water because ice has a lower density than water. This lower density means that ice weighs less than water in its liquid form. More » Science Physics Motion & Mechanics

Objects sink into water until the weight of water displaced is equal to the weight of the object. If the water weight that is displaced is less than the object’s total weight, the object sinks. More »

Objects comprised of material that is denser than water tend to sink; objects with a lighter density tend to float. Since air is lighter than water, hollow objects can float if their total density is less than water. Pre... More » Science Physics Motion & Mechanics

There are two formulas that may be used to calculate mass: mass is equal to the volume of an object multiplied by its density (m=v*d) and mass is equivalent to an object's weight divided by the acceleration of gravity (m... More »

The formula to calculate buoyant force (FB) states that the upward force exerted on an immersed object is equal to the density (ρ ) of the fluid multiplied by both the fluid’s displaced volume (V) and the gravitational a... More »