All Flashcards
What is density ()?
Density is the ratio of an object's mass to its volume:
What are the common units for density?
Kilograms per cubic meter () and grams per cubic centimeter ().
Define 'intensive property' in the context of density.
An intensive property doesn't change with the amount of substance. Density is an intensive property.
What is specific gravity?
The ratio of a substance's density to the density of a reference substance (usually water).
What does a specific gravity greater than 1 indicate?
The object will sink in water.
What does a specific gravity less than 1 indicate?
The object will float in water.
What happens when an object's density is less than the density of the fluid it's placed in?
The object floats.
What happens when an object's density is greater than the density of the fluid it's placed in?
The object sinks.
What effect does increasing the mass of an object (while keeping volume constant) have on its density?
The density increases.
What effect does increasing the volume of an object (while keeping mass constant) have on its density?
The density decreases.
What happens when water freezes?
It becomes less dense and forms ice because of the open space between molecules.
What are the key differences between mass and density?
Mass: How much 'stuff' an object has, extensive property. Density: How tightly that 'stuff' is packed, intensive property.
What are the differences between density and specific gravity?
Density: Absolute measure of mass per unit volume. Specific Gravity: Relative measure, ratio of a substance's density to a reference substance's density (usually water).
Compare intensive and extensive properties.
Intensive Property: Does not depend on the amount of substance (e.g., density). Extensive Property: Depends on the amount of substance (e.g., mass, volume).