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.
