Recent content by Rmehtany

  1. Rmehtany

    Understanding Lenz's Law and the Right Hand Rule in Electromagnetic Induction

    Wouldn't the field be out of the page because outside of the left ring, the field is out of the page?
  2. Rmehtany

    Understanding Lenz's Law and the Right Hand Rule in Electromagnetic Induction

    Homework Statement Homework Equations Not really? I just used the right hand rule and Lenz's law The Attempt at a Solution By the right hand rule, outside of loop 1, the magnetic field is out of the page. However, increasing resistance means that field is weakening. We know by Lenz's law...
  3. Rmehtany

    Gravitational Self Potential Energy

    Thank you for helping
  4. Rmehtany

    Gravitational Self Potential Energy

    Uh huh, so let me see if I understand you: The mass will be 8 times the original mass of the ball due to unvarying density, and radius is doubled. Since $$PE = \frac{-GMM}{R}$$, this equals $$\frac{8^2}{2}$$ = 32 times? Is that correct?
  5. Rmehtany

    A nasty integral to compute

    This is for my research project, and for reasons that are too complicated to explain now, I need a numerical answer. I have some evidence based on partial testing that the integral has a closed form solution. This includes the form that I discussed in the second part of my first post
  6. Rmehtany

    Gravitational Self Potential Energy

    I will try that, but are there other ways to solve this question? I kinda think my method is a bit sloppy.
  7. Rmehtany

    A nasty integral to compute

    Hey Guys! I was working on an integration problem, and I "simplified" the integral to the following: $$\int \limits_0^{2\pi} (7.625+.275 \cos(4x))^{1.5} \cdot (A \cos(Nx) + B \sin(Nx)) \cdot (Z-v \cos(x)) dx$$ This integral may seem impossible (I have almost lost all hope on doing this...
  8. Rmehtany

    Reheating vs particle creation due to acceleration

    I think you might be a bit confused, so I am going to stray a bit from the notion of "particle" By Heisenberg's Uncertainty Principle, quantum fluctuations create virtual particles that disappear soon after appearing. Occasionally, as we see in QCD, the energy necessary to produce these...
  9. Rmehtany

    Gravitational Self Potential Energy

    Note: I know this question has been asked before, but I wasn't allowed to ask my question on that thread 1. Homework Statement The gravitational self potential energy of a solid ball of mass density ρ and radius R is E. What is the gravitational self potential energy of a ball of mass density...
  10. Rmehtany

    High School Egg Drop project tips

    I did the egg drop project for my class two years ago, and my device was built as followed I had a cardboard tube where I placed two eggs, with crumpled paper between. On the bottom of the tube, I used 4 straw pieces to build a frame that would be crushed in order to reduce impact on crash...
  11. Rmehtany

    Friction Direction on Rolling Ball: Am I Missing Something?

    Yea, I am... Ah, I see, but I still have a problem, if the angular momentum is increasing, how does the ball stop? Does it stop decreasing, and when? I understand that angular momentum increases in the beginning
  12. Rmehtany

    Friction Direction on Rolling Ball: Am I Missing Something?

    But then if the angular speed is going up, how can the ball reach static equilibrium
  13. Rmehtany

    Friction Direction on Rolling Ball: Am I Missing Something?

    My question is the following. A ball is initially skidding and eventually starts rolling on a flat plane with friction, and later comes to a halt. Which direction does friction act? (see diagram) If friction acts to the right, then the translational speed will go up, and that's not right...
  14. Rmehtany

    A Black Hole's "lost entropy"?

    This is beyond my knowledge. I'll do my research.
  15. Rmehtany

    A Black Hole's "lost entropy"?

    Here are different ways of resolving the issue: Information is irretrievably lost Advantage: Seems to be a direct consequence of relatively non-controversial calculation based on semicalssical gravity. Disadvantage: Violates unitarity, as well as energy conservation or causality. Information...
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