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If the circular area lies in the xy-plane, only the z (or

**k**) component will be normal to the circular area's surface. So, since flux = ...1 Answers · Science & Mathematics · 13/09/2019

... 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

dA^ = r^ dh dφ E =

**k**q r^ / r³ then the angle θ between the electric field vector E^ and the vector dA^ is null1 Answers · Science & Mathematics · 12/09/2019

...along this line from the origin, since the force on it is F = Σ

**k***e*Q / d² where**k**= 1/4πε₀ = 8.99e9 N·m²/C²...1 Answers · Science & Mathematics · 11/09/2019

... 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