Recent content by dacruick

Hi there, the full question is as follows: Suppose omega_m = 0.2. If we observe cosmic acceleration at z=0, what is the possible range of values of q_0? What is the minimum value of lambda? What is omega_total? so I'm having trouble with the relationship between q_{0}, \Omega_{m,0}, \lambda...

Haha get your lawyer ready then :P. So I have the answer, I've expanded both of the series for n = 0, 1, 2, and 3 and I can sufficiently see that the terms will cancel out on both sides. However, I question the completeness of my answer. I assume that the only way to get marks for this...

I'm so stupid...Haha, not just because of the foolishness you stated but because as soon as you said that I'm pretty sure I figured out how to do it. Maybe it had something to do with that cup of coffee I just made. You'll have to tussle with Starbucks for partial credit of my pending success.

Hahaha Woah, intense.

Homework Statement By definition, e^{z} = \sum\frac{1}{n!}z^{n} Use this to show the relationship in the question title The Attempt at a Solution Well, what I've tried to do is as follows: e^{z_{1}}e^{z_{2}} = \sum(z_{1}z_{2})^{n}/{n!^{2}} And set that equal to e^{(z_{1}+z_{2})}...

Good question, I'm interested to see what some of the PF gurus say. Although I think you meant cyclical not circular.

Is it pale blue when dry? if its wet it will react with water and form copper hydroxide which is black. (I grabbed this from wikipedia)

I took a poorly taught linear algebra course in first year that fits the cookbook description. Nothing was in-depth, heck, nothing was even anything... What I mean to say is that I not want this style of teaching. That course, or lack-there-of, gave me a terrible foundation for quantum...

That sounds quite interesting. Let us know how the interview goes.

So if the person traveling to the other planet measures the distance to be quite small due to length contraction, and the person on Earth measures that distance to be large, how can they both measure the same speed relative to each other? Is this reconciled using time dilation? I can...

I have a question about this. Is it the distance between the planets that is contracted or the length of the spaceship that's contracted? I always assumed that both were possible, it just depended on the frame of reference. In the case that the distance between the planets is contracted, that...

I like this explanation. I think it is useful to make a direct comparison from length contraction to time dilation. If we look at age as the sum of all of the ticks on a clock, then for our length contraction to show its effects in the same way, we would have to define height as the sum of the...

yes I believe that is what he means. What I meant to say is that do you see a role for kinetic energy in this question? Initially, it is evaluated when the block is at rest. It then asks to find the maximum compression; when the block is also at rest.

I need some help to help you. Would you mind posting some of the ideas that come to your mind in how to solve this. There are three types of energy in this problem: kinetic, gravitation potential, and spring potential. Which do you think are relevant? Where are the possible places that the...

I don't know if you're interesting in this type of angle, but it was mentioned previously that an epidemic could start. Lethal, and contagious enough for humans to bomb their own cities. Small island populations could survive, South American natives far removed from civilization, a group of...