Recent content by jupiter13

Hey everyone, I've been looking at metamaterials, and it's quite an overwhelming subtopic to be introduced to. Most of the stuff I'm finding has to do with negative permeabilities. I'm wondering how exactly we control what relative permeability a material has and how fine that control is, not...

I might be biased here but medical physics is physics. And frankly, so is everything else in this world. I completely agree with what Choppy said. I have had my moments of weakness but I've never been angry or rude because of that. Calm down, pause, and restructure your approach to the task at...

You are on the right track in using trig to solve for the angle (based on the information you added to the diagram). You only need to look at the y-component of the triangle that the string makes with the top surface. That is what your height change is.

I can't gather from the problem that the ball experiences any acceleration. The really basic equation that comes to mind is: x=xo+vot+½at2. Give that a try. In the case that the ball is falling vertically, a=10ms-² instead of zero (9.81ms-² if you wanted to be more precise).

So second year's the devil then. That year where you haven't invested so much that it's too late to choose something else, and yet have invested enough to make it hard to leave? And on top of that, taking away the "let's level out the playing field for everyone before doing anything important"...

That's actually a really good point. Problem is, I don't feel that I am pursuing that knowledge, and my arms make it REALLY easy for me to find excuses to not do that. How do you build confidence and grasp the concepts when you can't solve practice problems? I think if I can figure that out...

Oh wow, thanks so much. Social life: I'm not that much of a party animal. Just random outings on the weekend for me. I would have liked to be more involved in campus groups, but I'll see how that fits in. One crucial point I forgot to mention was that I really did love my major in the...

Thanks to the both of you. I signed out Feynman's lectures today and skimmed a bit of it. It's exactly what I needed to know.

Hi everyone, I've dealt with resonance (normal modes of a system) in a fair amount of detail, but it was in the context of a mechanics course. Now, I'm trying to extent this concept to electromagnetism, particularly LRC circuits, and I'm having a really hard time wrapping my head around it. I...

I just finished my second year of university, where I'm majoring in engineering physics. My exams went horribly and so did the rest of this year. I'm often lost to the point that I don't even know where the holes are in my understanding and as a result I've lost a lot of the enthusiasm I had for...

I can't believe I fell for that...but thank you very much fo your help!

Homework Statement In the far future, a spaceship is traveling from Earth to Saturn at 0.1c when it receives a terrorist threat. The crew learns that a bomb will go off in 3 hours. To prolong this time, the captain accelerates the ship to 0.7c. How long do they have to find the bomb now...