diff --git a/education/physics/PHYS2210/Chapter 15.md b/education/physics/PHYS2210/Chapter 15.md
index 695a567..c3312fa 100644
--- a/education/physics/PHYS2210/Chapter 15.md	
+++ b/education/physics/PHYS2210/Chapter 15.md	
@@ -14,4 +14,10 @@ Fluids cannot maintain a fixed structure, but fit the shape of the container the
 Pressure is defined as **force *per* unit area*** exerted by a fluid.
 
 $$ p = \frac{F (N)}{A(m^2)} $$
-The SI unit for pressure is called a pascal, and it's $\frac{N}{m^2}$.
\ No newline at end of file
+The SI unit for pressure is called a pascal ($Pa$), equal to $\frac{N}{m^2}$.
+
+Pressure is exerted on the fluid's container. 
+
+Pressure is the same everywhere at the same depth.
+
+$$ 1atm = 101.3 kPa = 14.7 psi $$