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seen Mar 26 at 8:52

Apr
6
awarded  Yearling
Mar
12
revised Partition function of bosons vs fermions
added 1 characters in body
Nov
5
comment Are length contraction and time dilation physical?
Both, but it cannot explain this clearer than Einstein does, see here.
Apr
6
awarded  Yearling
Mar
20
comment Product of exponential of operators
This shows the if but not the only if...
Mar
17
comment A very elementary question regarding force of friction
Good answer....
Mar
16
comment Most efficient type of heat pump
it's a fake. Not even Maxwell's daemon can beat the second law.
Mar
11
comment Most efficient type of heat pump
If we assume that the second law is true (which all patent examiners do) then it is not possible to beat the Carnot efficiency.
Mar
4
comment Query about Bernoulli's principle
That the gravitational effect is unnotable is your mistake. It is exactly gravity which counteracts the gradient in pressure.
Jan
27
comment Factors of $c$ in the Hamiltonian for a charged particle in electromagnetic field
The first is the expression in the SI units (which most modern books are written in). The second is the expression in Gauss units (which still most scientific literature and old books use).
Jan
20
revised How to derive the period of spring pendulum?
deleted 2 characters in body
Jan
20
comment How to derive the period of spring pendulum?
@VladimirKalitvianski: thanks for spotting the typo.
Jan
20
answered How to derive the period of spring pendulum?
Jan
20
answered Magnetic force on capacitor
Jan
3
comment Flux quantization and AB effect and Laughlin's argument of IQHE
Because the charge is quantized in units of $e$. If you write down the Schrödinger equation for this problem, you will notice that you can gauge away full (and only full) flux quanta.
Jan
3
comment Flux quantization and AB effect and Laughlin's argument of IQHE
Laughlin says nothing about quantization. In fact any flux is allowed inside the cylinder. What he need however, is that an equivalent of a full flux quantum has no effect on the physics in the system.
Jan
2
comment Quantum mechanical angular momentum and spin formalism/notation
A direct sum $H=V_1 \oplus V_2$ is nothing but a statement that the Hilberspace $H$ consists of $V_1$ and $V_2$, i.e., a basis in $H$ is the combined basis of $V_1$ and $V_2$.
Jan
2
answered Quantum mechanical angular momentum and spin formalism/notation
Dec
31
answered Adiabatic process of an ideal gas derivation
Dec
28
comment Thermal equilibrium and non correlations
@VijayMurthy: why should it follow from the Bohr-van Leeuwen theorem that the position and the canonical momentum are not correlated???