# Yahoo Web Search

1. Sort by

1. ### 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

2. ### A block of mass m=1.17kg is tied to a string and swings around in a vertical circle of radius R=1.60m.?

...  88.2 - 11.48 = 76.72 N Centripetal force is mv^2/r (76.72×1.6/1.17)^.5 = velocity = 10.24 m/s Update if you need more, and...

1 Answers · Science & Mathematics · 07/12/2019

3. ### What would the force be if the separation between the two charges was adjusted to 7.31 ✕ 10-11m? (Physics)?

r = 7.31 *10^-11 m That's what it says. It is not r^2 = 7.31 *10^-11 m. r^2 = 5.34×10^-21 m --------------------- Did it not just...

3 Answers · Science & Mathematics · 05/02/2019

4. ### How do i find density of air used in a heave motion compensator? Do i need any special formula or i use the formula for density of dry air?

Air is pretty close to an ideal gas but you are getting up there in pressure. calculate the density using the ideal gas equation and then check it other published data. https://www.engineeringtoolbox.com/air-temperature-pressure-density-d_771.html this looks like about 240 kg/m^3...

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

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

cosΘ = adj / hyp = z / √(z²+R²)

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

6. ### What was the resistance (r) of the original length of wire?

When you connect 7 equal resistors in parallel, the equivalent resistance is 1/7 of the resistance of the individual resistors. So each piece has resistance 35 Ω. The entire wire is 7*35 Ω

1 Answers · Science & Mathematics · 01/05/2019

7. ### In a Broadway performance, an 84.5-kg actor swings from a R = 4.35-m-long cable that is horizontal when he starts. At the bottom of his arc?

Just prior to collision, v = √(2gh) = √(2 * 9.8m/s² * 4.35m) = 9.23 m/s conserve momentum during the collision: 84.5kg * 9.23m/s + 55.0kg * 0m/s = (84.5 + 55.0)kg * V and so the post-collision momentum is V = 5.59 m/s H = V² / 2g = (5.59m/s)² / 19.6m/s² = 1.60 m If...

1 Answers · Science & Mathematics · 15/05/2019

8. ### What are the variants of the centripetal force formula?

F = mv²/r Multiply both sides by r: Fr = mv² (equation 1...

2 Answers · Science & Mathematics · 10/01/2019

9. ### ball rolling on a hemisphere.?

a) (mVmax^2) / r = m g Vmax = sqrt(g / r) b) L = r m sqrt(2/3)Vmax L... = 1/2 m V^2 - m g r (1 - cosα) V^2 = [Vmax^2 + 2 g r (1 - cosα)] then Em = 1/2 m [Vmax^2 + 2 g r (1 - cosα)] - m g r...

2 Answers · Science & Mathematics · 06/08/2019

10. ### 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