Recent content by Spyder22

well the wire will have an induced magnetic field in the opposite direction (because it is a moving charge) and this will "cancel" out part of the original field. I'm not really sure of the technical terms, but it something to do with decreasing the magnetic field and since it takes energy to...

Well if you read about some of the other people who are applying (like at www.collegeconfidential.com ) who have things on their application like USAMO, RSI, NASA SHARP, Intel thing... AND have done amazing research on their own with published papers AND have taken 3 or 4 years of college math...

I just applied to MIT this year and will be getting my rejection letter in three days. :frown: I have ok scores (800M, 710V) and a few 800 SAT II's, a few clubs, some sports, a few state and low level national awards, but after learning more about the admission process I now know that it...

Thank you Rohin, I suspected there would be no current through those two resistors, but did not know how to prove it. I will have to read more on the internet about these wheatstone princeples as my book doesn't cover it. This makes the first problem very easy, but if you could provide some...

I really confused by this circuit: http://myspace.homelinux.com:32123/circuit.jpg When calculating the net resistance from A to C, how do I know if any current goes through 2 and 7? If there was current going through them, I have clue how they would contribute to the total circuit. For the...

oh wow duh that was obvious :blushing: thanks!

I'm confused by this problem: http://myspace.homelinux.com:32123/sound.jpg Can someone explain the solution and what's wrong with my reasoning? It takes 1.7/340 = .005 sec for the wave to travel the 1.7m. So for the waves to cancel woudn't .005 = T * 1/2 * n (where T is the period of the...

Ok here's the problem: Waves are produced by two point sources S and S' vibrating in phase. SEe the accompanying diagram. X is apoint on the second nodal line. The path difference SX - S'X is 4.5cm The wavelength of the waves is approxiately______. ````` o X ``````| ``````| ``````|...