Exercise 15.1 (a) find the magnitude of the electric force between two protons separated by 1 femtometer (10^-15), approximately the distance between two protons in the nucleus of a helium atom. (b) if the protons were not held together by the strong nuclear force, what would be their initial acceleration due to the electric force between them

(a) 230.4 N

(b)

Explanation:

Charge on a proton, q =

Distance between the two protons, d = 1 femto meter =

(a) By use of coulomb's law, the force between the two protons is given by

Where, k is the Coulombic constant = 9x 10^9 Nm^2/C^2

So, the force between them is given by

F = 230.4 N

(b) Acceleration is the ratio of force to the mass of proton.

the mass of proton, m = 1.67 x 10^-27 kg

So, acceleration

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the minimum amperage that the current in this wire would have to have so that its weight is completely supported by the magnetic force due to earth's field, assuming that no other forces except gravity act on it