PHYSICS
Lecture 1: Physical Quantities
A lesson on measurement and the language used in physics.
Physical quantity
A physical quantity is something that can be measured and expressed using a number and a unit.
Base examples
Length, mass and time are examples of measurable quantities. Units make measurements meaningful and comparable.
Scientific notation
Very large or very small values can be written using powers of ten, making calculations and comparisons easier.
Remember
Always check the unit as well as the numerical value when recording a measurement.