Richter magnitude scale
Absolute Magnitude of a Star - with parallax
Square wave (frequency)
Radial acceleration in circular motion
Klein bagel (4-D non-intersecting parameterization z-coordinate)
Overall heat transfer coefficient
Electrical Impedances - Magnitude
Rhombus area (trigonometric function)
Instantaneous current for L1(Three-phase electric application)
Critical Speed of a Rotating Shaft - Dunkerley's method