Recent content by raindrops

He's looking for a mathematical answer, not just a drawing. Any ideas on how to do that?

Homework Statement The 80 cm tall, 65 cm wide tank shown in the figure is completely filled with water (n=1.33). The tank has marks every 10 cm along one wall, and the 0 cm mark is barely submerged. As you stand beside the opposite wall, your eye is level with the top of the water. a.) Can...

Homework Statement The diagram illustrates a Helmholtz coil, consisting of two identical circular coils of wire, each one having N loops and carrying the same current I. The radius of each coil is R, and the two coils are R meters apart. (a) What are the direction and strength of the...

Homework Statement An oscillator circuit is important to many applications. A simple oscillator circuit can be built by adding a neon gas tube to an RC circuit, as shown in the figure below. Gas is normally a good insulator, and the resistance of the gas tube is essentially infinite when the...

Here's a link to the diagram. I hope it works. I wasn't able to copy/paste it out so I'm not sure how visible it is. http://i42.tinypic.com/2i6pehg.jpg

Homework Statement When the ionized particles entering a mass spectrometer are simply accelerated across the potential difference between two charged plates, there is always the chance of an uncontrolled variation in their velocities due to their random thermal motion before they undergo...

I figured it out. I was using the wrong radius. Thanks for the help :)

Okay so this is what I tried. 3.47-1.26=2.21\muA ~ this is the rate at which the charge is building \DeltaV = E \Deltax E = KQ/r2 so V = KQ/r2 * r = KQ/r 5 = [(9*109) Q] / 3.85 \rightarrow Q = 2.14*109 I = q/t 2.21*10^-6 = 2.14*10^9/t \rightarrow t = 9.68*10^14...

I guess I don't see how Coulomb's law applies. I don't have a point charge at all. If it's conducting, I have a uniform charge across the entire sphere and I don't even know what that charge is, just that so much current goes in and so much comes out. Plus doesn't coulomb's law determine...

Homework Statement Two wires are connected to a conducting sphere of radius 7.75 cm, which is initially uncharged. One wire carries a current of 3.47 μA into the sphere, and another wire carries a current of 1.26 μA out of the sphere. How long does it take to to produce an electric potential...

This is one of the methods I used and I kept coming up with 9*10-6 which is wrong so, I don't know what to do. Maybe my math is wrong. (K (5*10-6) Q0 cos (26.56)) / (2.23)2 = (K Q3 Q0 cos(18.43)) / (3.16)2

Homework Statement Three particles P1, P2, and P3 are located at the points (−2.00, −1.00), (0, 2.00), and (3.00, −1.00), respectively. P1 has a charge of 5.00 μC, but the charges of P2 and P3 are unknown. However, the three particles exert no net force on a charged particle that is placed at...

I'm not very good with ratios. Let me know if I did this right. 65=1/R^2 so R=.124 55=1/R^2 so R=.134 ratio is .124:.134 ?

Wspring=(1/2)kx^2 so W=.5*20*.3^2=.9 since the max speed is when all the energy is kinetic you can say the Wspring=(1/2)mv^2 so .9=.5*4*v^2 .45=v^2 sqrt(.45)=.6708 or .671

Homework Statement Harry and Sally are sitting on opposite sides of a circus tent when and elephant trumpets a loud blast. If Harry experiences a sound intensity level of 65dB and Sally only 55dB, what is the ratio of the distance between Sally and the elephant to the distance between the...