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1. Physics (Electric Charges)?

... 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

2. Find (a) the magnitude and (b) the direction of the net electric field at the origin.?

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

3. Find the angle between rod OA and the u-axis.?

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

4. A ball is thrown eastward into the air from the origin (in the direction of the positive x-axis). The initial velocity is 40 i + 64 k,?

u = <40, 0, 64> (initial velocity) a = <0, -8, -32> (you have a typing mistake) 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. a nonconducting rod of length L = 8.15 cm has charge -q = -4.33 fC uniformly distributed along its length.?

...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

6. An electric dipole consists of charges +2e and -2e?

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

7. PHYSICS question: Two point charges lie on the x axis.?

... 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

8. In the figure the four particles are fixed in place and have charges:?

... 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

9. Calculate the Magnitude and Direction of the NET Electric Field?

...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

10. In general, astronomical objects are not exactly electrically neutral. Suppose the Earth and the Moon each carry a charge of –1.27·106 C.?

Coulomb's law: F = k.q1.q2 /r² Newton's gravitational: Fn = G.m1.m2...

2 Answers · Science & Mathematics · 05/09/2019