Physics Flashcards
vector
A physical quantity that has both magnitude and direction.
scalar
A physical quantity that has magnitude only.
resultant vector
The single vector which has the same effect as the original vectors acting together.
distance
The length of path travelled.
displacement
A change in position
speed
The rate of change of distance
average speed
The total distance travelled divided by the total time taken to travel the
distance
velocity
The rate of change of position
average velocity
The total displacement divided by the time taken
instantaneous
velocity
The displacement divided by an infinitesimal time interval
instantaneous
speed
The speed of an object at a specific moment of time.
atom
A small particle of which all substances are made.
compound
A pure substance that is formed when two or more atoms of different elements join together through relatively strong bonds.
empirical formula
A chemical formula showing the simplest ratio between atoms in a compound.
molecular formula
A chemical formula showing the actual ratio and types of atoms in a molecule.
