Foundations of Physics
6 terms
Percentage Uncertainty
Foundations of Physics
%
The absolute uncertainty of a measurement divided by the measured value, expressed as a percentage.
Percentage Uncertainty = (Δx / x) × 100%
Physical Quantity
Foundations of Physics
Various
A quantifiable property of a physical system or phenomenon that can be measured and expressed as a numerical value multiplied by a unit.
Quantity = Value × Unit
Planck's Constant
Foundations of Physics
J·s
A fundamental physical constant that sets the scale for quantum mechanical phenomena, relating photon energy to its frequency.
E = hf, h = 6.62607015 × 10⁻³⁴ J·s
Polar Coordinates
Foundations of Physics
m, rad
A 2D coordinate system specifying point location by radial distance r from the origin and angular displacement θ from a reference axis.
x = r cos θ, y = r sin θ, r = √(x² + y²)
Precision
Foundations of Physics
Various
The degree of agreement or repeatability among independent measurements of the same quantity taken under identical conditions.
Standard Deviation (σ)
Pressure
Foundations of Physics
Pa
The perpendicular force exerted per unit surface area over which that force is distributed.
P = F / A