Recent content by yinx

Hi, you might be interested in this series of lectures by keio university yinx

If you want to learn freshmen physics i suggest - University Physics by Young & Freeman will suffice. It covers Netwonian Mechanics, Thermodynamics, Optics, Electricity&Magnetism, Special Relativity + some modern physics. Should be at its 11th or 12th edition. If you want a little more advance...

doesn't diodes have built in potential (aka contact potential)?? yinx

Hello, i was wondering for 1N4001 diode or zener diode has some built in potential, why can't they be used as batteries? I have some diodes lying around and I tried connecting to an LED, but it doesn't light up. I know this question seem dumb, any help will be appreciated! thanks! Yinx

thanks viko, i got what you mean =)

Hi viko, can i rephrase what you just mentioned as: if i am mentioning about any arbitrary point on the CD, it has 2 degree of freedom. However the CD as a whole, has 1 degree of freedom? thanks yinx

nope, but i thought that its 2 degree of freedom, because any point on the CD can be described by the angle of rotation and the radius from the center. well, just a thought.

Hello, Has anyone used Analytical Mechanics by Hand,Finch for their study in Classical Mechanics? Did the authors publish the solution for the questions given in the book? I can't seem to find them any where. Pardon me if i post this question in the wrong section. thanks, yinx

Hello, how do i calculate the degree of freedom for a rigid body with 3 mass points? My guess will be 6 degrees of freedom, 3 for each mass point which gives 9, minus the 3 constraints giving 6 in total. Is this correct? what about a rotating CD in a CD player? how many degrees of freedom...

Hi guys, how do a differentiation on a partial derivative e.g: d/dt (partial U / Partial X) ? kinda confused about it. Would be great if someone can answer this qn thanks!

anyone?

Homework Statement a) What is the E-field at the center of a metal ring which has uniform charge density? b) Is E=0 for any other point within the circumference of the ring?2. The attempt at a solution For (a), since the ring has uniform charge density and is symmetrical, based on symmetry...

Circular orbit equations and concepts: http://hyperphysics.phy-astr.gsu.edu/hbase/orbv.html#co

Hi ohmygosh123 welcome to PF! Please show an attempt at the question, like a relevant equations and what you think should be the correct way to solve this problem. -yinx-

this is part of bernoulli's equation and it's correct. you applied the same height of "8.49m" on both sides of the equation. If you do this, it means that "the height of the pipe remains the same throughout. ie. its a horizontal pipe parallel and 8.49m above the ground" however, The question...