10:36:42	 From Prof. Alexandre Mendes : F = P
10:36:50	 From Prof. Alexandre Mendes : CS = dF/dP
10:37:04	 From Prof. Alexandre Mendes : unidade CS = N/psi
10:37:18	 From Prof. Alexandre Mendes : U = psi
10:37:40	 From Prof. Alexandre Mendes : u(psi) x CS (N/psi)
11:24:52	 From Prof. Alexandre Mendes : al.mendes@gmail.com