Recent content by Renaldo

Homework Statement Balance the following oxidation-reduction reactions: PbO2 = Pb 2+ + O2 Homework Equations [/B] These are the steps I'm supposed to follow. 1. Determine the valence number (charge) for all the elements involved in the reaction. 2. Determine the number of e- given off...

Thanks. That works.

1/f = 0.4 1/do = 1.923 1/(0.4 - 1.923) = -0.66 cm (f = 2.5) (do = 0.52)

At first I said the image was to the right of the third lens. I now realize that was incorrect. I still don't understand how that affects the numerical value of my final answer, which is still wrong.

negative, because the image is formed on the same side as the object.

I just want to make sure we are using the same convention. My L1 is on the far right. L3 is on the far left. L2 is in between. If the image formed by the second lens is 2.72 cm to the left of the second lens, then it would not be 5.2 cm to the right of the third lens. Rather, it would...

I attached my work for this problem. db is the distance from the first first lens to the bug. The arrow represents the bug.

Homework Statement Three converging lenses of focal length 2.5 cm are arranged with a spacing of 2.2 cm between them, and are used to image an insect 2.3 cm away. Where is the image? Homework Equations 1/do + 1/di = 1/f The Attempt at a Solution I used the above equation to find...

I thought E stood for Vemf. Does it stands for Electric field?

Homework Statement A parallel plate capacitor has circular plates of radius 12.0 cm that are separated by a distance of 4.0 mm. The potential across the capacitor is increased at a constant rate of 1300 V/s. Determine the magnitude of the magnetic field between the plates at a distance r =...

"Recalculate the impedance of the RLC circuit at 88.1 MHz, then adjust R until you get 1/2 the current you got at 88.3." I guess I could do that pretty easily if I could determine the current in the optimized circuit. I can determine an equation for it, but it comes with two variables, I and...

Homework Statement The figure shows a simple FM antenna circuit in which L = 8.22 µH and C is variable (the capacitor can be tuned to receive a specific station). The radio signal from your favorite FM station produces a sinusoidal time-varying emf with an amplitude of 12.2 µV and a frequency...

limits of integration were from 0 to r, r < R.

da = 2∏rdr 2∏J0∫e(-r/R)rdr = -2J0∏R(r+R)/er/R B = -μ0J0R(r+R)/rer/R That's what I get and it isn't correct.

In that definition, is J constant? It seems to me that it would not be, but I don't know how to integrate ∫J0e-r/Rda