Determine the energy required to accelerate an electron from (a) 0.500c to 0.900c and (b) 0.900c to 0.990c.
1/11/16 Phys 20A WEEK TWO 1. inner planets rotate faster than outer planets 2. Kepler’s laws a. 1. orbits are ellipse with sun at one focus 3. planets from stars a. stars twinkle, planets don’t b. bc planets have bigger mass, so twinkling of particles makes light more constant c. planets shine: because reflect sun’s light d. planets can be brighter than most stars (venus and jupiter) or as faint as other stars (uranus and neptune) depending on distance and size