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I have a velocity vector defined as, $$V^i=frac{dX^i}{dt}$$Then, is the following manipulation correct?$$frac{mathbf{V}boldsymbol{cdot}mathbf{V}}{V^i}=frac{V_kdelta^k_{,,,,a}V^a}{V^i}=V_kdelta^k_{,,,,a}frac{dX^a/dt}{dX^i/dt}=V_kdelta^k_{,,,,a}frac{dX^a}{dX^i}=V_kdelta^k_{,,,,a}delta^a_{,,,,i}= V_i$$If not where am I making a mistake? Please help. Edit: Actually...
Asked on 05/24/2021
2 answerWhat I know is total angular momentum $vec{j}= vec{ell}+vec{s}$, here $ell=3$ for $f$ state, $s=1/2$ for spin, so the total angular momentum should be $7/2$,...
Asked on 05/24/2021 by HuHu
1 answerI am attaching a piezoelectric patch at a point of a moving object, I will like help to know how to convert the output voltage responseI get drom an oscilloscope...
Asked on 05/24/2021 by Aig
1 answerI was going to post a question about gargantuan black holes being made from dark matter, but then I read some of the answers.. One question I do have...
Asked on 05/24/2021
2 answerI want to calculate $langle p_xrangle$ and $langle p_x^2rangle$ for ground state electron in $rm H$ atom. Radial function$$psi(r)=Ae^{-r/a}$$Momentum operator in 3D:...
Asked on 05/24/2021
1 answerI was taught to apply a "pseudo force", [which is equal to mass × acceleration (of point of suspension)] in the direction opposite to the point's acceleration and then proceed...
Asked on 05/24/2021 by Shashank
2 answerEven though we can make no observations beyond the cosmological horizon, I think people tend to picture a universe that is either homogeneous to infinity, or possibly having spacelike slices...
Asked on 05/24/2021 by Mark Foskey
1 answerMotivation. I was recently reviewing the section 3.10 in Sakurai's quantum mechanics in which he discusses tensor operators, and I was left desiring a more mathematically general/precise discussion. I...
Asked on 05/24/2021 by joshphysics
7 answerI'm reading an old paper ("Wigner's Function and Other Distributions in Mock Phase Spaces," Balazs and Jennings, Phys. Rep. 104(6), 1984), and came across the following statement (in which ...
Asked on 05/24/2021 by flevinBombastus
1 answerThe title is simply my question. I know that alpha and beta radiation does not emit any type of photon, but all radioactive materials seems to emit some type of...
Asked on 05/24/2021 by Tom Bushell
2 answerGet help from others!
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