Recent content by newbe318

I was looking at the solution for problem 6 and I am confused on taking the derivatives of the function f(x)= cos^2 (x) I took the first derivative and did get the answer f^(1) (x)= 2(cos(x)) (-sin (x)), but how does that simplify to -sin (2x)? Is there some trig identity that I am not aware...

I know that at terminal velocity, bv=mg ... so, mg=1/2CpAv^2.. would I just solve for v? .. v=sqrt((2mg)/(CpA))... v=1.38m/s ? m: 84kg C: 0.8 p: 1.2kgm^3 A: 987cm^2

Homework Statement I attached a screen shot of the problem. Homework Equations D= 1/2 C p A v^2 bv=mg The Attempt at a Solution I spent 3 long hours on this problem. I confused myself even more. Please help me understand what is going on.

You add them?

I didn't get very far. I skipped that problem and continued with my other homework problems.

Homework Statement Suppose you measure three numbers as follows: Homework Equations x= 200. +-2. y= 50. +-2. z= 40. +-2. where the three uncertainties are independent and random. Use step-by-step propagation to find the quantity q= x/(y-z) with its uncertainty. The Attempt at a...

Hi, I too am an undergraduate physics major, but I haven't taken my first physics course since I needed to take a few math courses. However, I do understand what your going through. I go to all my math lectures, sit in the first row, and pay close attention to my professor, but I always end up...

Hi everyone, I was wondering if anyone knew of any physics love/valentine's day/relationship puns? I was hoping to make my boyfriend a Valentine's Day card. I know Valentine's Day isn't near, but I really wanted to give lots of thought into his gift. I would greatly appreciate everyone's...

Thank you so much. That clears up a lot of questions.

Hello, can anyone please explain to me in a different approach, rather than repeating a book definition, what is the Ising model? and what conclusions were made from it? I would sincerely appreciate it, since I can't seem to grasp the concept even after reading numerous articles online and in...

To start off, I am a freshman majoring in physics and I am a girl. Over the past few months in college, I am beginning to feel like I don't fit in. Because I am not as smart as others, I am questioning if I still want to major in physics. To be honest, I am very good in biology and understand it...

Thank you for helping me. In case you're wondering, yes it doesn't seem like freshman material because my partners are the one who decided to research this topic for our presentation.

Can anyone please explain to me what is the Ising model, Hilbert space, and Hamiltonian ? However, please explain it as simple as possible because I am a freshman. I have looked up all three things. I've tried my best to make some sense of it, but I am, honestly, still confused on what any of...