Lateral earth active pressure (Rankine theory)
Angular Momentum
Sudden expansion of a pipe (total head loss)
Resonance frequency RLC
Pearson's moment coefficient of skewness
Frequency of a string under tension (nth harmonic)
Beta distribution (Harmonic mean)
Wind turbine yaw error
Fahrenheit <-> Rankine
Rule of 72 (estimating an investment's doubling time)