Equations

The document provides formulas related to physics. It includes formulas for radioactivity, exponential decay, capacitors, harmonic oscillators, gravitation, Doppler shift, ideal gases, electromagnetic machines, electric and magnetic fields, quantum mechanics, ionizing radiation, and general physics. Key formulas include the half-life equation, capacitance equation, period of a pendulum, ideal gas law, transformer equations, Coulomb's law, De Broglie wavelength, exponential attenuation of gamma radiation, and density equation.