Find answers to your questions about Physics or help others by answering their Physics questions.
The electrostatic force $F$ between two point charges $q_1$ and $q_2$ changes as the distance $d$ between the charges changes as seen from Coulomb's law: $$F=frac{q_1q_2}{4pi varepsilon_0...
Asked on 06/25/2021 by RobotRaven
3 answerI'm reading Nakahara GEOMETRY, TOPOLOGY AND PHYSICS now.Then, Hodge Laplacian is given bybegin{align}Delta=(d+d^{dagger})^2=dd^{dagger}+d^{dagger}dend{align}For example, we consider 0-form $f$, then $d^{dagger}f=0$begin{align}Delta...
Asked on 06/25/2021 by Pefkin
1 answerThis question may fit better in the discussion of "Why Complex variables are required by QM?", but it also relates to the extent to which arguments by Hestenes are accepted...
Asked on 06/25/2021 by Len
4 answerAssuming an input air flow rate, the room volume and an underpressure (let's say 5%) is known, is it possible to determine the output air flow rate? What law can...
Asked on 06/25/2021
1 answerA recent paper (Modeling heat transport in crystals and glassesfrom a unified lattice-dynamical approach) derived expressions for thermal conductivity in a system of harmonic oscillators that...
Asked on 06/25/2021
0 answerI am currently studying the finite spinor transformations in QFT. There is equation which i do not fully understand. Rather i don't understand the notation and what it represents:...
Asked on 06/25/2021
1 answerif it took a very certain amount of energy to excite an atom, how come when it de-excites it emits a photon of lower energy?I know that's what scintillators...
Asked on 06/25/2021 by Tomka
1 answerLet's say an object is at rest in Earth's reference frame. We know that Earth's reference frame is non inertial. If we were to observe that object from an inertial...
Asked on 06/25/2021 by π times e
2 answerThis is not a question per se -- I am trying to recall an example from a lecture long ago about the inconsistencies that arise when you try to use...
Asked on 06/25/2021 by nonreligious
0 answerIn QFT we define the scattering matrix from the scattering amplitude as $$S_{fi} = limlimits_{trightarrow infty}limlimits_{t_0rightarrow -infty }leftlangle fleft|U(t,t_0)right|i rightrangle = delta_{fi} +(-i)(2pi)^4delta^4(p^mu_f-p^mu_i)underbrace{mathcal{M}_{fi}}_{text{Scatt. Amp.}} + dots ;...
Asked on 06/25/2021 by Achnos
1 answerGet help from others!
Recent Answers
Recent Questions
© 2024 TransWikia.com. All rights reserved. Sites we Love: PCI Database, UKBizDB, Menu Kuliner, Sharing RPP