Electron held up against force of gravity

AI Thread Summary
To determine the distance between an electron and a proton that balances gravitational and electrostatic forces, the relevant equations include Coulomb's Law and the force of gravity. The user correctly identifies the need to apply Coulomb's Law with constants for charge and distance. They express uncertainty about incorporating gravitational force and seek guidance on the next steps. The solution involves equating the gravitational force (F = mg) with the electrostatic force derived from Coulomb's Law. Clarification on the gravitational constant and mass of the electron is necessary for further calculations.
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Homework Statement



an electron is held up against the force of gravity by the attraction of a fixed proton some distance above it. How far above the electron is the proton?

Homework Equations



F= ((K)(Q1)(Q2))/R^2

Qe = 1.6x10^-19

The Attempt at a Solution



Using the formula for Coulombs Law I used the K constant of 9x10^9 and Qe for Q1 and Q2. This is all divided by R^2 (I'm solving for R). The problem is I don't know if there is a gravitational constant for Force or what I'm missing. What's the next step?
 
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Write F = mg where m is the mass of the electron.
 
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