Recent content by 4eleven

  1. 4

    Electron velocity and unit vector notation

    Homework Statement An electron has an initial velocity with an x component of zero, a y component of 17.2 km/s, a z component 20.7 km/s, and a constant acceleration of 1.95 x 1012 m/s2 in the positive x direction in a region in which uniform electric and magnetic fields are present. If the...
  2. 4

    Calculating Engine Power for Headlights: Solving for Efficiency and Resistance

    The headlights of a certain moving car require 11 A from the 12 V alternator, which is driven by the engine. Assume the alternator is 84% efficient (its output electrical power is 84% of its input mechanical power), and calculate the power (in hp) the engine must supply to run the lights. I...
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