How long does it take to go 3000 miles at the speed of light?

3000 miles (1609 meters/1 mile)

= 4827000 meters

Light travels at 2.998 X 10^8 m/s

4827000 meters (1 s/2.998 X 10^8 m/s)

= 0.016 seconds

6.58×10⁻¹⁸ J

Explanation:

Applying

E = kq²/r Equation 1

Where E = potential energy, q = charge on each electron, r = distance between the electron, k = coulomb's constant.

From the question,

Given: r = 3.5×10⁻¹¹ m,

Constant: q = 1.6×10⁻¹⁹ C, k = 8.99×10⁹ Nm²/C²

Substitute these values into equation 1

E = (1.6×10⁻¹⁹)²(8.99×10⁹)/(3.5×10⁻¹¹)

E = 6.58×10⁻¹⁸ J