(a) What’s the percent error introduced when you use Galileo’s rule, instead of Einstein...

(a) What’s the percent error introduced when you use Galileo’s rule, instead of Einstein’s, with

(b) Suppose you could run at half the speed of light down the corridor of a train going three-quarters the speed of light. What would your speed be relative to the ground?

(c) Prove, using Eq. 12.3, that if v_AB < c and v_BC < c then v_AC < c. Interpret this result.

Equation 12.3