# Additional difficulty is caused by the number of different kinds of "constants and variables" we use

- numbers 2, p, e, 5/7
- universal constants c, h, e, k (Boltzmann)
- experimental parameters m, R, T, k (spring const.)
- initial conditions x0, v0
- independent variables x, y, z, t, k (wave number)
- dependent variables x, y, v, E

## Additional difficulty is caused by the number of different kinds of "constants and variables" we use