Density
The density of a substance is its per unit .
The unit of density is the per cubic .

Pressure
Pressure is per unit .
The unit of pressure is the .
One pascal is equal to one newton per square metre.

Archimedes' Principle
When an object is partially or completely immersed in a
it experiences an equal in magnitude to the of the fluid displaced.

The Law of Flotation
The law of flotation states that the of a floating body is equal to the weight of the fluid it .

Boyle's Law
Boyle's law states that at constant
the volume of a fixed of gas is proportional to its .

Newton's Law of Universal Gravitation
Any two masses in the universe attract each other with a
that is proportional to the of their
and proportional to the square of the between them.

Moment of a Force
The moment of a force about an axis is equal to the of the force
multiplied by the distance from the to the line of action of the force.
The unit of moment is the .

Conditions for Equilibrium
If a body is in equilibrium then
the vector of the forces in any direction is zero
the sum of the about any point is zero