c:\vhmthphy\*******
Every time t key is struck, timer shows time since first keystrike and time interval since previous keystrike. Also displays graphs, gives filing options.
Practice and feedback in using computer timer to time interval between two sounds; to be expanded to timing of motion at a later date.
Simulation of the gravitational field of a planet, including simulation of an orbit with user-chosen planetary size, surface field strength, initial position and velocity vectors..