Oral Maths Physique — Sujet Grand

My name is Léa, and I have a condition the doctors call "synesthetic physics." When I look at a stone vault, I don’t see stone. I see vectors of force. When I hear the wind, I don’t hear air; I hear the Navier-Stokes equations. And as the spire collapses in slow motion on every television screen, my brain is screaming one terrifying phrase: Non-linear propagation of thermal stress.

I wrote on the board:

[ x(t) = A e^{r_1 t} + B e^{r_2 t} ]