Formulas
What is the formula for Density?
Density = Mass / Volume
What is the definition of Density?
The measurement of how much mass a substance contains within a given volume.
What happens the further you push a basketball under water?
It's buoyant force causes it to increasingly resist being pushed further under water.
In other words, the further one pushes the ball under water, the harder it is to push.
What is Archimedes’ Principle?
The buoyant force acting on an object equals the weight of the fluid displaced.
What is the formula for Volume?
Volume = Mass / Density
What is the definition of Volume?
The amount of space an object takes up.
What kind of buoyancy does an object have if it floats?
Positive Buoyancy
What are the two forces acting on a submerged object?
Gravitational Force and Buoyant Force
What is the formula for Mass?
Mass = Density x Volume
What is the definition of Buoyancy?
The tendency of a material to rise or float in a liquid.
What happens to the density of an object as it is heated?
It’s density decreases
How do big ships manage to float when the materials used to build them are very dense?
Average Density: Ships are built with a hollow hull in order to decrease its average density lower than water allowing the ship to float.
How can you find the volume of an irregular object?
Submerge the object in water, then measure how much the volume of the water increases. The amount of displaced water represents the volume of the submerged object.
What is the definition of Buoyant Force?
The upward force exerted on an object submerged in fluid.
What kind of buoyancy does an object have if it neither sinks nor floats?
Neutral Buoyancy
How does a hot air balloon float in air?
When the temperature inside the balloon rises, the gas expands and becomes less dense than the surrounding air.