764 reputation
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bio website xuanji.appspot.com
location Singapore
age 21
visits member for 3 years, 6 months
seen Jul 1 at 2:39

Student


Jan
26
answered Difference between the two equations for acceleration
Jan
26
revised How energy conservation is not violated here?
add latex formatting, fix spelling errors, remove final question mark
Jan
26
suggested suggested edit on How energy conservation is not violated here?
Jan
11
awarded  Yearling
Dec
27
answered Can the electric field — always — be derived from the potential?
Oct
6
answered Nature of frictional force
Oct
4
comment Why is it energetically favourable for molecular bonds to form from a QM point of view?
Why would it increase the kinetic energy? The electron wavefunction is now spread over two protons and the internuclear region, doesn't that make it less localized?
Oct
4
answered Why is it energetically favourable for molecular bonds to form from a QM point of view?
Oct
3
answered $\gamma$ in Newton's Second Law of Motion in Differential Form
Oct
3
comment If I switch on a generator connected to an open circuit, are the charges oscillating along wires?
Do you mean short circuit?
Sep
30
revised Probability amplitude in basic quantum mechanics
add latex formatting
Sep
30
comment Probability amplitude in basic quantum mechanics
If it's near Born's rule (en.wikipedia.org/wiki/Born_rule), perhaps it's just a wavefunction given as an example to demonstrate applying Born's rule on. BTW, you can use latex on physics.SE (meta.math.stackexchange.com/questions/5020/…) to enter things like the proportionality sign.
Sep
30
answered Determine resultant velocity of an elastic particle-particle collision in 3d space
Sep
30
comment Probability amplitude in basic quantum mechanics
Hmm it's incorrect even with a proportionality sign. Maybe you're thinking of $e^{i\theta} + e^{-i\theta} = 2 Re(e^{i\theta}) = 2\cos(\theta)$.
Sep
30
suggested suggested edit on Probability amplitude in basic quantum mechanics
Sep
30
answered Probability amplitude in basic quantum mechanics
Sep
24
answered Jacobian, Lorentz and Fourier Transformation
Sep
23
answered Does lightning have mass?
Sep
19
comment Normalizing Wave Functions
Since the integrand is positive everywhere, how can we normalize to $-1$? We normalize the square because $|\psi(x)|^2dx$ is the probability of finding the particle in the small interval $(x,x+dx)$; hence $\int |\psi|^2 dx$ is the probability of finding the probability in the interval $(-\infty, \infty)$, which better be $1$.
Sep
19
revised Mass-Energy Equivalence
added 603 characters in body