Recent content by Uranium235

I'm currently in a mechanics course (second year) that uses the David Morin book (Introduction to Classical Mechanics) which I find to be very unhelpful. It's mostly just problems with very little explanation of the concepts. I'm looking for a textbook to replace Morin's which covers the same...

Thanks for all the answers guys! It looks like I'm going to have to patiently wait for the string theorists to do their stuff! :P I thought its only particle motion that stops when absolute zero is reached? So unless time is a particle (reminds me of Chronons in Doctor Who), wouldn't that mean...

So for years now, I've been of Stephen Hawking's opinion that asking what was before the big bang is a meaningless question since its like asking what's north of the North Pole. However, after watching BBC Horizon's What Happened Before the Big Bang, I have to admit that I am a little...

Ok got it! Thanks for the answers guys!

Ok so this is a problem that's been bothering me ever since the first few days of learning kinematics. We've been taught that when an object falls, the object has a positive velocity up until the moment that it hits the ground. At that moment, the velocity becomes zero. Wouldn't this imply...

Hello everyone! I would like to know if there exists any metals with a relatively low temperature at which polymorphous takes place (say lower than 400C). Also, would the metals revert back to their previous crystalline structure if cooled down in a short period of time? Thank you very much!

What is the equation for the energy/frequency of Hawking radiation emitted from a black hole? Thank you in advance! EDIT: I found this http://library.thinkquest.org/C007571/english/advance/core5.htm but the website doesn't seem to be a legitimate source and it doesn't give the derivation of the...

Hello again! So this time I have a few questions about the wave nature of the electron. So I've read that an electron can behave both as a wave and as a particle. My questions are regarding the electron as a wave. 1) When does the electron behave as a wave? Is it a transverse or longitudinal...

Hello everyone!:smile: First of all, this is not a thread begging for research questions; I don't like taking other people's ideas and attaching my own name to them. Anyways, I have this big essay I need to write and I chose the subject of physics (this is the IB EE if anyone was wondering). I...

Homework Statement Well I would like to prove that any equation that follows the pattern y=rx-r^(-1) is tangent to some sideways parabola (I know this to be true). Problem is that I need help in finding the parabola in question and actually proving my conjecture. I do know, after graphing...

Thank you very much for the quick response. I was able to go from where you left off and get the correct answer. :smile:

Here's a problem that I am having difficulty doing: Homework Statement The question states: if 2f(x)-3f(1/x)=x^2, determine f(2) I am confused about the relationship between f(x) and f(1/x). My attempt right now consists of substituting y for f(x), 1/y for f(1/x) and 2 for the x in x^2 but i...