physics

posted by .

How close must two electrons be if the electric force between them is equal to the weight of either at the earth's surface?

  • physics -

    Set m g = k e^2/R and solve for R.
    m = electron mass = 9.11*10^-31 kg
    g = 9.8 m/s^2
    e = 1.60*10^-19 C = electron charge
    k = Coulomb constant = 8.99*10^9 N-m/C^2
    The answer (R) will be in meters

  • physics -

    5.08m

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Physics

    Calculate the force of gravity on a spacecraft 19200 km (3 earth radii) above the Earth's surface if its mass is 1600 kg. Hint: At three earth radii from the surface of the Earth, the gravity force (weight) of the spacecraft will be …
  2. Electric forces

    An electron is released above the earth's surface. A second electron directly below it exers just enough of an electric force on the first electron to cancel the gravitational force on it. Find the distance between the two electrons. …
  3. physics

    In the Millikan oil drop experiment, an atomizer (a sprayer with a fine nozzle) is used to introduce many tiny droplets of oil between two oppositely charged parallel metal plates. Some of the droplets pick up one or more excess electrons. …
  4. physics

    how far apatr should two electrons be if the electric force each exerts on the other is equal to the weight of an electron ?
  5. physics

    how many electrons must be removed from each of the two 5kg copper spheres to make the electric force of repulsion between them equal in magnitude to the gravitational attraction between them?
  6. Physics

    How far apart must two protons be if the magnitude of the electrostatic force acting on either one due to the other is equal to the magnitude of the gravitaional force on a proton at the earth's surface?
  7. physics

    An astronaut throws a wrench in interstellar space. How much force is required to keep the wrench moving continuously with constant velocity?
  8. Physics

    Assume that in interstellar space the distance between two electrons is about 0.87 cm. The electric force between them are repulsive. Calculate the electric force between these two electrons. The value of the Coulomb constant 9 × …
  9. Physics

    When you drop a 0.27-kg apple, Earth exerts a force on it that accelerates it at 9.8 m/s2 toward Earth's surface. According to Newton's third law, the apple must exert an equal and opposite reaction force on Earth. If the mass of Earth …
  10. Physics

    Calculate the distance between the two proton such that the electrical repulsive force between them is equal to the weight of either

More Similar Questions