Recent content by mace2

Homework Statement A high-speed train is traveling from Capital City to Shelbyville. According to an observer at rest on the ground, the clocks at the railroad stations in Capital City and Shelbyville both strike noon at the same time. According to a passenger on the train, when the Capital...

Hi Grep. Thanks very much for your explanation. Okay, so now I understand the frequency simply determines the amount of energy contained within one photon (the "loudness" if you will), and only the intensity of the light affects the rate of photons. My only outstanding question is about the...

So does that mean the rate of photons is always constant? And it's just the energy of the photon that changes? I thought the intensity was proportional to the square of |E|. But then how do I reconcile that with the frequency being the quantity that determines a photon's energy? Thank you for...

Hi, I was hoping you could help me in my understanding of light as both a wave and a particle. In particular, let's say we have light propagating at some frequency v. Does each oscillation of the electric field correspond to one photon? That is, if the wave has v cycles per second, does that...

Since you're in BC, I'd suggest checking out the UBC and SFU campuses, just to get a feel for them. I attend UVic, which I like very much. Might be worth coming over for a day too, to take a look. Unfortunately I can't say much more than that--I'm quite satisfied studying physics at UVic (and...

Understanding " f:S --> R" Hi all, I am kind of confused as to what it means to do this operation: f:S --> R Let's say S is a set in R^2, and function f takes its values into R^3. I see this a lot but don't really understand it. Does that mean that f is a function of two variables (call...

Hopefully that's clear enough (I just added to your drawing). Since they're both right angle triangles, the angle must be the same.

Thank you HallsofIvy, all so simple now. Just had a little trouble reading it!

If you have a library nearby I would reocmmend trying to find a text there... not sure what to suggest, but maybe have a flip through until you find something suitable?

Edit: My friend just explained it to me, duh! If the row adds to zero then (row)dot(1,1,...,1) = 0! And it is in the nullspace. Thanks anyway! :) Hi all. I've been learning about determinants and I was reading one of the sample problems in my textbook. I thought I understood the chapter...

^ Does that include the final? Sounds like about the normal length of courses for me. For example for me... Start first week of January, Finish classes beginning of April. That's about 12 weeks. Then the final exam is about a week later than that. So linear algebra in 11 weeks... I think...

Depends. If it's an accelerated course, I probably wouldn't take it. If it's a full-length 4-month course (May-August), then I see no reason why not--would be the same as any other semester. My school offers a variety of course lengths. I don't know if this is common or not though.

^ I second this opinion.

In the numerator you have (-5.4912 + 1.0982 + 3.74x). You can't add the numbers together to get (-.653x). Instead you have (-4.393 + 3.74x). Only the last number is multiplied by x.

Try simplifying your expressions and cross-multiplying?