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... on q₃ from q₁ F₁ = kq₁q₃/r² =

**k**(4.5µ)(1.6µ) / 0.75² = 9e9(7.2e-12) / 0.5625 = 115.2e-3 unlike...1 Answers · Science & Mathematics · 12/09/2019

field E = vector Σ kQ / d² where

**k**= 8.99e9 N·m²/C² x-direction: The two charges on the...1 Answers · Science & Mathematics · 10/09/2019

The angle between two vectors is given by cosΘ = a•b / (|a| x |b|) where a•b represents the dot product of a and b So assuming you have given the vector for F, |F| = √(512.6² + 1025.2² + 1025.2²...

1 Answers · Science & Mathematics · 10/09/2019

u = <40, 0, 64> (initial velocity) a = <0, -8, -32> (you have a typing mista

**k**e) v(t) = <40 + 0*t, 0 + (-8)t, 64 + (-32)t> . . . .= <40, -8t, 64 – 32t> (agreed) Remember displacement (s) in a given direction is...1 Answers · Science & Mathematics · 07/09/2019

...5.583 x 10^(-14) C/m (c) 180 degrees. (b) E = integral of

**k**lambda dx/(a + x)^2 from x = 0 to 0.15 m. magnitude of E = (9.0 x 10^9 ...1 Answers · Science & Mathematics · 06/09/2019

I agree that cases 1 and 3 are both 0 (although I think that the word "moment" should not have been in the question). For 2, the moment is M = F*d = q*E*d where q = 2e and you should NOT add cos90, since that's 0 and you don't have a zero torque...

2 Answers · Science & Mathematics · 06/09/2019

... this type of question we can simplify the working by taking

**k**=1,ans using Q in units of pC. That...2 Answers · Science & Mathematics · 06/09/2019

... positive, the field is E = Σ kQ/d² =

**k***[12e/(2d)² - 3e/d²] =**k***[3e/d² - 3e/d²] = 0 N...1 Answers · Science & Mathematics · 05/09/2019

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

**k**is the coulomb constant = 8.99×10⁹ N·m²·C⁻²...1 Answers · Science & Mathematics · 05/09/2019

Coulomb's law: F =

**k**.q1.q2 /r² Newton's gravitational: Fn = G.m1.m2...2 Answers · Science & Mathematics · 05/09/2019

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