Foundations of Physics
5 terms
Absolute Uncertainty
Foundations of Physics
Various
The margin of measurement error expressed in the same physical units as the quantity being measured.
x = x_mean ± Δx
Absolute Zero
Foundations of Physics
K
The theoretical lower limit of thermodynamic temperature, defined as 0 Kelvin (-273.15°C or -459.67°F).
0 K = -273.15°C
Accuracy
Foundations of Physics
%
The degree of closeness of a measured value or experimental result to the true or accepted reference value.
Error = |Measured - True| / True × 100%
Ampere
Foundations of Physics
A
The SI base unit of electric current, defined by fixing the elementary charge to e = 1.602176634 × 10⁻¹⁹ C.
1 A = 1 C / s
Avogadro's Number
Foundations of Physics
mol⁻¹
The exact number of elementary entities (atoms, molecules, ions) contained in one mole of a substance.
Na = 6.02214076 × 10²³ mol⁻¹