Recent content by Sheepwall

Hello, I was trying to solve a problem in my course book, and I noticed I don't really understand energy levels completely. My ignorance covers more than one specific problem, so I figured I'd ask a general question, rather than post the problem. The Rydberg formula: ##...

Nonpolarized wave through polaroid always halves its intensity; When the max value of intensity is reached, the full intensity of the polarized component of the partially polarized wave is let through. Now, the whole intensity of this max is the sum of the halved non-polarized wave and the full...

Homework Statement Unpolarized light hits a flat glass surface, 37.5 degrees to the surface's normal. The reflected light's polarization is investigated with a polaroid. The relationship between the max and min value of intensity from the polaroid when it is rotated is 4.0. What is the index of...

Okay, so comparing my previous image to the one below: Here, gravity's pull on A (again, like you did, assuming that A's mass is greater than that of the unlabeled), displacing A the distance s, will do the same to the unlabeled weight. In the previous image, displacing A by s, would displace...

Thanks for the (very) quick replies! If you don't mind, continuing on the theme of triviality; Could I make something accelerate faster than gravity using wheels and cables, like so (A): Again, disregarding frictions. How should I think when finding acceleration and tensions in these kinds...

The problem was present in a physics 1 exam, and I'm reasonably sure I know the answer, yet my friend contradicts me in my conclusion. Homework Statement Find magnitude of acceleration of system ABC. Masses of A, B and C are all equal and each has mass 2.00 kg. Let gravitational acceleration g...

Thank you for the help, I solved it yesterday by dividing numerator and denominator by 3x and realizing that 3x = 2x * 1.5.

Thanks, I'll try that. Don't you mean the limit \displaystyle\lim_{x\rightarrow 0} {\frac{\sin(x)}{x}} = 1 though?

Ah! Forgot to mention: L'Hôpital's rule is prohibited on this exercise. Sorry, I'll add it to the post.

Homework Statement "Calculate the following limit if it exists. If it does not exist, motivate why. \displaystyle\lim_{x\rightarrow 0} {\frac{x + x^2 +\sin(3x)}{tan(2x) + 3x}} Do not use l'Hôpital's rule." Homework Equations (1) \sin(a\pm b) = \cos(a)\sin(b)\pm\cos(b)\sin(a) (2)...

I'm going to need some hint, I've tried some different ways; Writing (a + 1)^(2n+3) as a sum, futile long division. Thanks in advance.

Ah, yes, I shall think about that in the future. As for this problem, though. I still can not solve it :(

Can I really assume that an+3 + (a + 1)2n+3 is divisible by a2 + a + 1, when that is what I am aiming to prove? Sorry, just trying to get into the whole induction thinking... Thanks for your time, btw :) really appreciate it!

I've been thinking about this for some time. Now I'm coming on here in the hope of getting some help; Prove that an+3 + (a + 1)2n+3 is divisible by a2 + a + 1. I can't quite remember the restrictions on n, though I'd imagine it'd be "for all real n ≥ -1" or something similar. Thanks in...

Hello, members of physics forums. This is my first post and question. As such, it will be quite basic. In an electric field, a conductor with a neutral total charge is placed. All the charges in the conductor will be on the surface, negative charges against the external electric field, positive...