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1. ### I have V, and current for different lengths. I can get R with R=V/length. How does cross sectional area relate to the R vs. length graph?

It is not true that R=V/length. You can get resistance R = V / I where... suspect that it is to calculate the resistivity ρ of the wire material. R = ρℓ / A so, if you plot R (vertical) vs ℓ/A...

2 Answers · Science & Mathematics · 11/09/2019

2. ### What is the volume Vball of the ball (radius R) with charge q?

... is the volume VG of the Gaussian sphere (radius R) … “ should be: “What is the volume VG of the Gaussian...

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

3. ### The next figure shows, in cross section, a plastic, spherical shell with uniform charge Q = −16e and radius R = 10 cm.?

... where k = 1/4πε₀ = 8.99e9 N·m²/C² For r < 10 cm, the outer shell of charge has no effect on the field...

1 Answers · Science & Mathematics · 12/09/2019

4. ### what is cos in terms in R and z?

cosΘ = adj / hyp = z / √(z²+R²)

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

5. ### a charged spherical shell of total charge q and radius R and two concentric Gaussian spheres, S1 and S2.?

QUESTION1: How much charge is enclosed by Gaussian sphere S2? No, you don't need a formula. You're told that the "total charge [is] q", so I'd say qenc = q QUESTION 2: so how much charge is...

1 Answers · Science & Mathematics · 11/09/2019

6. ### What does the expression reduce to if we move so far away along the central axis that ?

For z >> R, E = qz / [4πε₀*(z²+R²)^(3/2)] ≈ qz / [4πε₀...

2 Answers · Science & Mathematics · 04/09/2019

7. ### For any patch element on the G-cylinder’s curved surface, what is the angle θ?

dA^ = r^ dh dφ E = k q r^ / r³ then the angle θ between the electric field vector E^ and the vector dA^ is null

1 Answers · Science & Mathematics · 12/09/2019

8. ### Physics Help Plx (plz provide answer and not formula) THX!!!!?

we must use r^2 v= constant. r is the radius and v is the velocity. first condition...4*4=1. This remains a constant. In the second segment r=1. velocity =1 m/s. In the third segment (1/4)^2 v=1. v=16 m/s...

3 Answers · Science & Mathematics · 15/09/2019

9. ### At what distance from a 1.00*10^-5 C charge will the electric potential be 10000 V?

V = kq/r so r = kq/V = 8.98755179e9 * 1e-5/1e4 = 8.98755179e9 * 1e-5/1e4 = = 8.98755179e9...

3 Answers · Science & Mathematics · 15/09/2019

10. ### 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,?

...s= ut + ½at². You forgot the “½”: r(t) = <40t, 0t + ½(-8)t², 64t + ½...

1 Answers · Science & Mathematics · 07/09/2019