Recent content by newbe318

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    Taylor Series (Derivative question)

    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...
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    What is the Terminal Velocity of a Skydiver with Given Parameters?

    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
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    What is the Terminal Velocity of a Skydiver with Given Parameters?

    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.
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    Error Propagation: x/(y-z) Uncertainty

    I didn't get very far. I skipped that problem and continued with my other homework problems.
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    Error Propagation: x/(y-z) Uncertainty

    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...
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    Really struggling with physics, would like advice

    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...
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    Physics love puns or valentine's day ideas?

    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...
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    Please explain the Ising model in a simpler way, thank you

    Thank you so much. That clears up a lot of questions.
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    Please explain the Ising model in a simpler way, thank you

    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...
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    Do somthing you love or you're good at?

    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...
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    Ising model, Hiblert space, Hamiltonian

    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.
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    Ising model, Hiblert space, Hamiltonian

    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...
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