Question

As a laudably skeptical physics student, you want to test Coulomb\'s law. For this purpose you set up a measurement in which a proton and an electron are situated 995 nm from each other and you study the forces that the particles exert on each other. As expected, the predictions of Coulomb\'s law are well confirmed. You find that the forces are

A) Repulsive or Attractive

B) and the magnitude of the force is   ____________N

Answer 1

from the Columbs law

F = k q1 q2/ r^2

= 9 * 10^9 ( 1.6 * 10^-19) ( -1.6 * 10^-19)/( 995 * 10^-9)^2

= -2.32* 10^-16 N

negative sign indicates force between the proton and electron is attractive