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Foundations of Physics

Kelvin

The SI base unit of thermodynamic temperature, defined by fixing the Boltzmann constant to k = 1.380649 × 10⁻²³ J/K.

K = °C + 273.15 K Classical Mechanics

Kinetic Energy

The scalar energy an object possesses by virtue of its motion, proportional to its mass and the square of its speed.

KE = ½ m v² J Plasma Physics

Kink & Sausage Instabilities

Ideal magnetohydrodynamic (MHD) macro-instabilities occurring in current-carrying pinched plasma columns.

m = 0 (Sausage Mode), m = 1 (Kink Mode) MHD Instability Modes Electromagnetism & Electronics

Kirchhoff's Laws

Two fundamental circuit analysis laws expressing conservation of electric charge (Current Law) and conservation of energy (Voltage Law).

KCL: ∑ I_in = ∑ I_out; KVL: ∑ V = 0 A (Current), V (Voltage)