Recent content by athena810

I'm looking through Stewart's text and he does prove a bunch of things...but I don't know if you mathematicians consider that rigorous. I did find Lang's 4th Edition A First Course in Calculus and I like how he explains things. It's very clear. The only thing is that, I do know a lot of what...

I think my goal is to really understand Calculus and not just memorize things. The understanding part of math is the reason why I like math at all, and I don't want to just memorize equations and theorems and not understand how they work. I'm not sure if this would be considered rigor or if I'm...

Ok, and yeah i found Spivak sort of confusing; he doesn't state the obvious, but I hear Apostol does, which is good. Just wondering, why is Stewart's book considered not a great book? It seems like a pretty standard Math textbook.

Hi, Background: I'm a junior self-studying Calculus, and I want to study from a rigorous textbook. I've seen many threads comparing and contrasting the textbooks of Apostol and Spivak. I have access to the online versions of both author's textbooks, but I find it difficult to concentrate...

Alright, thanks!

Hi, So how does measuring my arm get the Kinetic Energy? Sorry, I'm really confused. So I should put the measurements at 2 significant digits? Oh, it asked for horizontal and vertical and not together, i should have put theta = 0 for Vx and theta = 270 for Vy.

I don't quite understand...is there no theta then? And I did not really throw it in the parabolic path. I thought it would be easier to throw it horizontally like this: http://awwapp.com/s/e5/a7/af.png But the initial Velocity in y direction is 0 m/s...or at least I think that's what I was...

I don't understand, do i just time the amount of time I swing my arm and the length of my arm? significant figures, the time i got was .5 seconds which is 1 significant figure. Direction. Vectors require both magnitude and direction. It is 0 because it is relative to the ground. With respect...

micole, It was parabolic in the air.

Homework Statement For a physics project, i need to answer a bunch of questions after conducting an experiment with projectile motion. I have answered most of them. The questions with the work shown are here: http://i.imgur.com/JmYPMC9.png I cannot answer number 10 and 11, because I don't...

Can you check my physics homework please?? Homework Statement My physics project includes predicting (1) the time it takes a ball to go down a slide http://i.imgur.com/TfQI87H.png I'm not sure if it's right though. (2) finding the coefficient of friction between me and the slide...

No, it was not from a textbook. Oh, ok, I kind of understand. Is it required that i write a reason for doing why I did what I did or are the reasons implied?

Will this work? So definition of | |: The positive value of any real number. Case 1: If x, y >= 0..then |x| = x, |y| = y, xy >= 0. Thus |xy| =xy = |x||y|?

So if I keep it under the radical: ... sqrt(|xy|) = sqrt(|x| * |y|) ?

It was defined the normal way with the 4 cases. Then it was like: "This theorem can also be proved in a much simpler way. Notice: √x^2 = |x|. Also, in most of the example proofs, they didn't list the reasons why. It would list all the steps, then at the bottom be like "<this> could happen...