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...point at a distance (r) is given by: E = kQ / r²

**k**is the coulomb constant = 8.99×10⁹ N·m²·**C**⁻² The field is away from a positive point charge and towards a...1 Answers · Science & Mathematics · 05/09/2019

...data are given to 3 sig. figs, we should use the value of ‘

**k**’ to 3 sig. figs. E1 = kq1/d² = 8.99*10^9 * 6.60*10^-9 / 0.350² = 484.36 N/**C**E2 = kq2/d² = 8.99*10^9 * (-3.10)*10^-9 / 0.155² = -1160...2 Answers · Science & Mathematics · 08/08/2019

...4π(0.10m)² = 5*1.6e-19C solves to E = 7.2e-7

**C**◄ Compare that to E =**k***Q / r² where**k**= 1/4πε₀ = 8.99e9 N·m²/C²...1 Answers · Science & Mathematics · 12/09/2019

...surface. So, since flux = E (dot product) A, then flux = 10^3 N/

**C**(4.0 j (dot)**k**+ 3.0**k**(dot)**k**) (pi * R^2). j (dot)**k**= 0, and**k**(dot)**k**= 1, so flux = 10...1 Answers · Science & Mathematics · 13/09/2019

The unrounded answer from part a) is 3.2344x10^17 N/

**C**. It's best to use this unrounded value in part b). The force...1 Answers · Science & Mathematics · 04/09/2019

... = Σ kQ/d² =

**k***[12e/(2d)² - 3e/d²] =**k***[3e/d² - 3e/d²] = 0 N/**C**Of course. q4 has 4x the magnitude and opposite sign of q3 and is...1 Answers · Science & Mathematics · 05/09/2019

...the opposing E fields are equal. Factor out

**k**and 1e-9 -6/x² = -3/(0.6-x)² +6/x² = +3/(0.6-x)²...1 Answers · Science & Mathematics · 13/05/2020

...a v(t) = int(a * dt) = at +

**C**v(0) = 0 v(t) = at s(t) = (1/2) * a * t^2 +**C**s(0) = 0 s(t) = (1/2) * a * t^2 v(**k**) = 82.1 s(**k**) = 2000 82.1 = a ***k**2000 = (1/2) * a ***k**^2 4000 = a ***k**^2 4000 / 82...1 Answers · Science & Mathematics · 18/07/2019

... the total force acting on a charge q3 = 1.6μ

**C**located on the x-axis at x=0.75 m. They...from q₁ F₁ = kq₁q₃/r² =**k**(4.5µ)(1.6µ) / 0.75² = 9e9(7.2e-12...1 Answers · Science & Mathematics · 12/09/2019

... Q in units of pC. That’s because the ‘

**k**’s will cancel, and the conversion factors for changing pC to**C**will cancel. (If you prefer, do the calculations in full - the...2 Answers · Science & Mathematics · 06/09/2019

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