X

Great sites

Mistakes

Draper consults a recorded video-lecture on survival tips while on Mars. Behind the lecturer is a chalkboard with two force laws from physics written. One is Newton's law of gravity, the other is Coulomb's law for electric charges. The constant of proportionality for Coulomb's law is given as e0, whereas this is really only one component in the whole expression for the constant, 1/e04pi. See more...