Equations on the window: restaurant in Oxford

At one point Physics students were writing equations on the window of the refectory and now the habit seems to have been picked up by one of the restaurants in town. A perfunctory glance suggests that they look OK. There are only two given in the form that we teach in school. lambda = Ln2/T gives a value for the decay constant in terms on the half-life. Ek = 1/2 mv^2 is the standard equation for kinetic energy.