diff --git a/education/physics/PHYS2220/Magnetism.md b/education/physics/PHYS2220/Magnetism.md
index 586576f..13b0075 100644
--- a/education/physics/PHYS2220/Magnetism.md
+++ b/education/physics/PHYS2220/Magnetism.md
@@ -3,4 +3,13 @@
 - The magnetic force is always at right angles to both the velocity $\vec{v}$, and the magnetic field $\vec{B}$
 - The force is greatest when the charge is moving at right angles and is zero for motion parallel to the field. THe force is generally proportional to $\sin(\theta)$, where $\theta$ is the angle between the velocity $\vec{v}$, and the field $\vec{B}$.
 The formula that describes magnetic force compactly is:
-$$ $\vec(F)_B = q\vec(v) \times \vec{B} $$
+$$ \vec(F_B) = q\vec(v) \times \vec{B} $$
+	- $F_B$ is the magnetic force
+	- $q$ is the charge the force is acting on
+	- $v$ is the velocity of the charge
+	- $B$ is the magnetic field
+For the magnitude of a magnetic force:
+	$$ |\vec(F_B)| = |q|vB\sin(\theta) $$
+For the radius of a particle's circular path:
+$$ r = \frac{mv}{qB} $$For the period of a particle's circular orbit in a uniform magnetic field:
+$$ 
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