Recent content by accidentprone

Difference between "physical reach" and "logical reach" of fibre optic Undergrad physics student here, working with fibre optic cables for my final year project, specifically to do with amplifying signals for fibre-to-the-home internet service. I understand the physical reach of fibre optics...

Homework Statement Calculate the minimum Lawson parameter for sustained deuterium-deuterium fusion in a plasma with an energy of 10 keV. Homework Equations The Lawson parameter is given as $$ n \tau > \frac{12 k T}{<\sigma v> Q} $$ where \sigma is the fusion cross-section. The Attempt at a...

I have been reading up on the luminiferous aether as a background to the Michelson-Morley experiment of 1887. I am currently stuck on understanding a point in Stoke's model of the aether ( The "Silly-putty model") Everywhere I have searched online mentions how he proposed that the aether...

Thank you for the reply - I was so concerned about being told vaguely by the question that the electrons end up "far apart" that I completely ignored the 1 nm to begin with!

Homework Statement Two electrons are held 1 nm apart and then released. Assuming them to be classical particles, how fast will they be moving when they are far apart? Homework Equations Not sure here really due to the lack of info give in the question. I know the work done would be qV...

Hey sorry to be posting in an old thread, but I wanted to say that I've solved the problem. I hadn't seen the Lorentz transformations in that form before. My book makes no mention of beta being v/c. Once I knew that it all came together! Thanks for your help.

Oh I see - it's Greek, not Latin. I should probably think in a wider context next time. Thanks for the help!

I'm studying for my physics exam on thursday and an odd thought just struck me. It is easy to see where the names for isothermal and isobaric processes came from - iso being the latin for equal, thermal being to do with heat and baric being to do with pressure. However what about ischoric...

Ok so I've drawn two graphs - one of x' against y' and one of x against y for the frames and tried fiddling around with them. I think I might be going down the wrong track though! I'm confused as to how I will show what's being asked... Where will v come from?

Hey! Thanks for replying :) I understand your hint, but I'm still unable to get going on the answer. Could you tell me how I should start answering the problem? Many thanks again for your time!

Homework Statement Consider the Lorentz transformations: ct' = gct - Bgx x' = gx - Bgct y'=y z'=z Show that the primed frame corresponds to a "rocket" frame moving at speed v in the x direction relative to the unprimed frame. (Sorry about my notation: g = gamma) Homework...

Thank you again, especially for the speedy replies - much appreciated!

Thank you! One last question. I'm now asked to find the electric field immediately outside the conductor, given that the outside surface has a radius of 8 cm. Will The electric field outside be only produced by the charges on the outside surface as the inside and outside charges do not interact?

Homework Statement A hollow sherical conducting shell is suspended in air by an insulated string. The total charge on the conductor is -6 microCoulombs. If an additional point charge of +2 microCoulombs is placed in the hollow region inside the shell what is the total charge induced on the...

c^2 occurs frequently in special relativity: in the Lorentz transformations, in forumlas for the interval, relativistic energy, and others too. Is there an intuitive reason for the high occurence of c^2?