physics
Gauss's Law
$$\oiint \vec{E} \cdot d\vec{A} = \frac{Q_{enc}}{\epsilon_0}$$
Gravitational Potential Energy
$$U = mgh$$
Kinetic Energy
$$E_k = \frac{1}{2}mv^2$$
Laplace's Equation
$$\nabla^2 f = \nabla \cdot \nabla f = 0$$
Momentum (Newtonian)
$$p = mv$$
Newton's 2nd Law
$$F = ma$$
Ohm's Law
$$V = IR$$