Chapter 1: Measurement Flashcards
What is a physical quantity?
A characteristic or property of something that can be measured with a numerical value.
State 2 examples of a physical quantity.
Length, mass, time, temperature, and speed.
What is the definition of scalar quantity?
A scalar quantity is a physical quantity that has only magnitude and no direction.
What is the definition of vector quantity?
A vector quantity is a physical quantity that has both magnitude and direction.
Give 2 examples of vector quantities.
Displacement, velocity, force, and acceleration.
Give 2 examples of scalar quantities.
Mass, temperature, time, volume, and speed.
State 7 base quantities and their SI units.
Length, meters (m)
Mass, kilograms (kg).
Time, seconds (s).
Temperature, Kelvin (K).
Electric, amperes (A).
Luminous Intensity, candela (cd).
Amount of Substance, moles (mol).
What is a base quantities?
Physical quantities that cannot be defined in terms of other physical quantities.
What is a derived quantity?
A physical quantity that is derived by a combination of base quantities using mathematical operations.
Give 2 examples of derived quantities.
Area and Speed.
What is physics?
A knowledge to find a rational explanation of the nature of matter, energy and natural phenomena.
Give 2 examples of fields in physics.
Heat
Light
Electrical and electronics
Astronomy
Nuclear
Biophysics
Wave
Force and motion
Plasma physics
What is standard form?
A way of writing down very large or very small numbers easily.
