1. T

    Reynold's Theorem in One Dimensional Space

    I'de be grateful for a URL to a proof of the Reynold's Transport Theorem reduced to one dimensional space. Must be a one dimensional representation no hand-waving explanation. Where is this written, I wonder? Thank ye, M'boys... JP
  2. J

    Perpendicular axis theorem problem

    Hi everyone, I have come across a problem that I am afraid I really don't know how to start to tackle. It is a problem of the type - to show that a theorem works for particular situation from first principals using generic elements and coordinate system and so prove the theorem in general...
  3. D

    Does this theorem falsify macrorealism?

    Good evening! Recently I have found this article: It tells about a no-go theorem which is considered to rule out several forms of macrorealism. The description of the theorem is on the page 9. As authors say, it implies contradiction between macrorealism...
  4. J

    Parallel-axis theorem problem

    Hi everyone,Can anyone point out what I am doing wrong with the following problem ? Problem A thin uniform rod of mass M and length L is bent at it's centre so that the two segments are now perpendicular to one another. Find it's moment of inertia about an axis perpendicular to it's plane...
  5. J

    Work-energy theorem problem (reprise)

    Hi everybody, Sorry I've not been on the site for a while but I have been ill and spent some time in hospital. I've just come back and I am revisiting the last problem I posted on the system and I'm afraid I still don't see how to solve it even with the hints a couple of you sent me. I will...
  6. J

    Work-energy theorem problem on a hanging weight

    Hi everybody ... Its been a while since I've been on the site , however I've come across a problem which on first reading appears fairly straightforward but which has got me flummoxed. The problem is as stated below ... and has to be solved using Work-Energy equations (Kinetic and Potential...
  7. J

    Work-energy theorem problem

    Hi everyone, I have a problem that has me stumped and would appreciate some pointers as to where I am going wrong and maybe point me in the right direction for solving the problem. The problem is in essence to use the "Work-Energy Theorem" to find the co-efficient of kinetic friction in a...
  8. C

    A few Work-Energy Theorem related problems

    I understand the basic principle of the work-energy theorem, but not sure how to factor in friction for these problems. Any help would be greatly appreciated.
  9. T

    Fermat's last theorem ( only one A4 page)

    do You see where we can use above idea in physics ?
  10. K

    Noether's Theorem - Invariance

    I am studying Noether's theorem and every example I look at seems to gloss over the need to prove invariance before applying the theorem. my text gives the Rund-Trautman identity for invariance as follows: \frac {\partial L}{\partial q^ \mu}\zeta ^\mu+p_\mu \dot \zeta^\mu+\frac{\partial...
  11. P

    Vogt-Russell Theorem

    Hello, I have a 20 minutes presentation about Vogt-Russell theorem and to discuss how to model stellar structures. Can someone provide me with some hints and some important details that I should mention in my presentation? I would appreciate it if someone can provide me with a good...
  12. B

    applying Nortan's theorem

    Need to find the nortan's equivalent circuit across AB. So to find that I know that I have to short circuit A with B. Then I also know that there will be no use of Z1. But now how am suppose to apply KVL to the loop with E and Z1, I1 and I2 in ordr to find I1? Any help is appreciated.
  13. M

    Equipartition Theorem Calculations

    Question a) Estimate the internal energy <E> in the high temperature (equipartition) limit for CO. b) Estimate the heat capacity Cv in the high temperature (equipartition) limit for NH3. Do not use partition functions in your calculations. Attempt at Solution a) According to the...
  14. M

    Vector Calculus: Divergence theorem and Stokes' theorem

    Hi =) I've been working on some exercises, but unfortunately we are not given the answers, so have no idea if I am going wrong or not. I attemted part a) which reads: Consider the vector field V= 3x^2y i - 2xy^2 j - xyz k Determine the divergence of this vector field and evaluate the...
  15. R

    heat in w.e theorem

    i was wondering how work -energy theorem in mechanics incorporate heat? any help will be welcomed with delight.
  16. R

    theorem of residues

    the theorem about sum of residues tells us that the integral f(z)dz around a closed curve in complex plane containing many singular points is equal to 2 pi i times the sum of the residues calculated at each singular the proof we make cuts and apply cauchy integral theorem in each and...
  17. R

    stokes theorem

    IN books,while reading stokes theorem ,i often come across the words "two sided surface".what does it mean?my instinct tells me that all surfaces are 2 sided(2 faces?).i know that the contour must be a simple closed curve, but why we call it 2 sided?thanks.
  18. R

    maximum power transfer theorem

    show that the power absorbed by the load is half the power delivered by source when the load and source impedances are conjugates.
  19. M

    Thevenin's theorem

    Hey. I have been working on some exercises. It all went well until I got to this one. The transistor in the picture is an NPN transistor. I know the RC value is missing. That’s probably an error, but as long as an appropriate value is used I guess it...
  20. A

    Parallel axis theorem

    Hey. I have a question, in the Parallel axis theorem, what's M? Lets take for example a full circle, I know that the moment of inertia is 1/2MR^2. I saw in a question (the solution), that the moment of inertia on every point on the perimeter of the circle is MR^2 + 1/2MR^2 and that got me...