Recent content by ness9660

I can't really find any wavelengths to compare my calculated wavelengths to, just pictures of spectra, you can't make a positive id on that. e.g. I have a blue/violet 1st order to the right of center, wave length=348.99, and to the left of center=523.359. Looking at this...

Using data collected from a spectrometer, with a diffraction grating of 100 lines/mm, I have collected a set of data. From this I have calculated wavelengths for the 1st and 2nd order lines of the three brightest visible colors, which were Blue/Violet, Green, and Orange. To complete my lab I...

Im working to prove that an interior point on a chord is also interior to the circle containing the chord. I've got the entire proof almost finished and laid out, however I am stuck on one part. My proof would be complete if I could show this: Given an isoceles triangle, in absolute...

Honestly, I am not even sure exactly what radiated power means. Why is the 18.4mW not the radiated power of the light bulb? I thought electrical energy was essentially work, which is a product of power and time, so how could radiated power be anything except 18.4mW? Are they referring to...

I know that the electric field lines between two oppositely charged points are symmetric, but I can't seem tof ind any refrence as to when this symmetry breaks down. I want to say that electric field lines do not maintain symmetry if the two charges are not equal but opposite, e.g. a -4 and...

A) By definition linear charge density is Q/L. So for the inner conductor with 2λ I want to say it is 2Q/infinity but this cannot be right. I am sure using Guass's law produces a correct answer but I cannot see anyway to relate it to λ or length of the conductors for that matter B) For...

Well you would have \frac{1}{C_{eq}}=\frac{1}{C_1}+\frac{1}{C_2} and \frac{1}{C_{eq}}=\frac{1}{C_1}+\frac{1}{C_3} and finally \frac{1}{C_{eq}}=\frac{1}{C_1}+\frac{1}{C_2}+\frac{1}{C_3} but how could you find the final charge without using a voltage?

Ive tried so many different ways using the formula for series capacitors and Q=CV and I've had no luck solving this problem. There must be some rule (or trick) I am missing involving combing C12 and C13 that I am completely missing. Can anyone offer any insight into solving this problem?

Nevermind, I feel dumb now. I completely missed that j^2=-1

Given this problem and its solution: http://img230.imageshack.us/img230/9239/quest13lf.gif I think the given solution is wrong. The equivalent impedence is R + jwL || 1/jwC, right? When I work out jwL || 1/jwC, I get ((jwL) * (1/jwC))/ (jwL + 1/jwC) = jwL / (j(w^2)CL + 1)...

Generally I am confused about the use of sin and cos in physics problems. http://img188.imageshack.us/img188/3162/eg2gu.gif The torque about the beam's attachment to the wall is: T * 8 * sin(53) Where T is the tension of the wire. Why is sin the choice and not cos? The...

Actually I just figured it out, thanks for the help!

Thanks, after that it was easy to solve. Iam still however lost on the first problem. So is it .83333 of a cycle out of phase, but I am still unsure as how to relate this to wavelength?

For #2, here is the full question: http://img137.imageshack.us/img137/8669/q229ni.gif As for the first problem, their cycles are out of phase (5pi/3)/2pi = .83333, right? so if the points are 30cm apart, the wavelength is .8333 *30cm?

1) A transverse wave of frequency 25 Hz propa- gates down a string. Two points 30 cm apart are out of phase by (5*pi)/3 What is the wave length of the wave? An- swer in units of cm. Im kinda lost here, I am unsure how wave length will relate to the given info. I am sure the phase is...