General Physics 1 (June 29-July 2)

Physical Quantities

Any property that can be measured and expressed using a number and a unit.

Base and Derived Quantity

2 Types of Physical Quantity

Base Units

are the basic building blocks of measurement. They measure fundamental things and do not come from other units.

Derived Units

are made by combining two or more base units. They measure quantities that are calculated from the basic ones.

Length:meter:m
Mass:kilogram:kg

Time:second:s

Work&Energy:joule:J

Electric Current:Ampere:A

Temperature:Kelvin:K

Lumious Intensity:candela:cd

Angle:radian:rad

Force:Newton:N

Area:square meter: m2

Volume:cubic meter:m3
Speed:meter per second:m/s

Angle velocity:radian per second:rad/s

Frequency:Hertz:Hz

Electric Charge:coulomb:C

Magnetic Flux:weber:Wb

Pressure:pascal:pa

Power:Watts:W

ALL SI UNITS:

SI prefixes

Are symbols or words added before an SI unit to show that the quantity is larger or smaller than the base unit by a power of 10.

Tera, Giga, Mega, Kilo, Hecto, Deca, Base, Deci, Centi, Mili, Micro, Nano, Pico

SI Prefixes from biggest to smallest:

Accuracy

Closest to the target, helps us get the correct answer

Precision

It is about being consistent. Getting consistent results