$\mathrm{\Delta X}$ = Displacement

$v$ = Velocity

$V_{\mathrm{f}}$ = Final Velocity

$V_{\mathrm{i}}$ = Initial Velocity

$a$ = Acceleration

$t$ = Time

$F$ = Force

$m$ = Mass

$\mu$ = Coefficient of Friction

$F_n$ = Normal Force

$F_g$ = Gravitational Force

$G$ = $6.67\times {10}^{-11}$$m^3/\mathrm{kg}{s}^2$

$r$ = Center-to-Center Distance

$W$ = Work

$F_{\parallel }$ = Force parallel to the Direction of Motion

$d$ = Distance

$K$ = Kinetic Energy

$U_G$ = Gravitational Potential Energy

$h$ = Height

$g$ = Acceleration due to Gravity

$U_s$ = Elastic Potential Energy

$k$ = Spring Constant

$K_r$ = Rotational Energy

$I$ = Rotational Inertia

$\omega$ = Angular Speed

$P$ = Power

$p$ = Momentum

$J$ = Impulse

$T$ = Period

$l$ = Length of Pendulum

$\theta$ = Angular Displacement

$\omega$ = Angular Speed

${\omega }_{\mathrm{f}}$ = Final Angular Speed

${\omega }_{\mathrm{i}}$ = Initial Angular Speed

$\alpha$ = Angular Acceleration

$a_c$ = Centripetal Acceleration

$r$ = Radius

$\tau$ = Torque

$A$ = Amplitude

$L$ = Angular Momentum

$\mathrm{\Delta L}$ = Angular Impulse

$\rho$ = Density

$V$ = Volume

$P$ = Pressure

$A$ = Area

$k_B$ = $1.38\times {10}^{-23}$$J/K$

$\kappa$ = Thermal Conductivity

$T$ = Temperature

$n$ = Number of Moles

$R$ = 8.31 J/(mol·K)

$\mathrm{\Delta U}$ = Change in Interal Energy

$Q$ = Heat Transfered

$W$ = Work done on the System

$L$ = Thickness

$I$ = Current

$Q$ = Charge

${\epsilon }_0$ = $8.85\times {10}^{-12}$$C^2/N·m^2$

$k$ = $9.0\times {10}^9$$N·m^2/C^2$

$F_E$ = Electric Force

$q$ = Point Charge

$E$ = Electric Field Strength

$V$ = Voltage

$d$ = Separation between plates

$U_E$ = Electric Potential Energy

$C$ = Capacitance

$\kappa$ = Dielectric Constant

$R$ = Resistance

$\rho$ = Resistivity

$L$ = Length

$P$ = Power

$R_{\mathrm{Eq}}$ = Equivalent Resistance

$R_i$ = Individual Resistors

$C_{\mathrm{Eq}}$ = Equivalent Capacitance

$C_i$ = Individual Capacitors

$F_M$ = Magnetic Force

$B$ = Magnetic Field Strength

${\mu }_0$ = $\mathrm{4\pi }\times {10}^{-7}$$(T·m)/A$

$l$ = Length of Wire

$\Phi$ = Magnetic Flux

$ϵ$ = EMF

$N$ = Number of Turns

$\lambda$ = Wavelength

$f$ = Frequency

$f$ = Focal Length

$s_i$ = Image Distance

$s_o$ = Object Distance

$h_i$ = Image Height

$h_o$ = Object Height

$M$ = Magnification

$n$ = Refractive Index

$c$ = $3.00\times {10}^8$$m/s$

$L$ = Path Difference

$m$ = An Integer

$E$ = Energy

$\phi$ = Work Function

$h$ = $\mathrm{6.63}\times {10}^{-34}$$J·s$