Recent content by DrClaude

If you simply declare the pointer as private, each thread will have its own pointer, but that pointer will point to a random place in memory. If you declare it as firstprivate, the address pointed to will be the same for all thread, i.e., each thread will have its own pointer, put all those...

Found.Phys. 30 (2000) 1145-1160 https://doi.org/10.1023/A%3A1003677103804

Equations will be different when using CGS compared to SI, so one cannot simply change the units of the values used. Could this be source of your problem? https://en.wikipedia.org/wiki/Gaussian_units

Edit: uploaded image doesn't look good. Try this link.

Yes, according to the scenario as presented up to this point. On which Feynman then reflects:

Then there is no heat going to the paddel side. ε of heat is added to the ratchet side.

Which case are you considering: the ratchet going forwards or backwards?

https://en.wikipedia.org/wiki/Spherical_coordinate_system#Integration_and_differentiation_in_spherical_coordinates

##\ket{\psi(x)}## doesn't make sense. ##\ket{\psi}## is an (abstract) vector in Hilbert space, so it doesn't make sense to write it as having a position dependence. To convert to a wave function, you have $$ \psi(x) = \braket{x | \psi} $$ If you have, for example, a particle on a ring, "all...

I don't get it :cry: Edit: I get it now. But I'll leave the crying emoji because onions...

Thread closed for moderation.

You are assuming that oxygen makes up 21% of a gas of uniform molecular mass 32 amu. You have to account for the fact that nitrogen is lighter.

Correct. It will be useful to remember that ##\braket{|}## correspond to complex numbers and can be moved around equations as needed.

##|ψ'\rangle=|h2\rangle\langle h2|ψ\rangle## is nothing but ##|ψ'\rangle= c |h2\rangle## with ##c## some complex number. Physical states are defined up to an arbitrary complex scalar constant, so it is the same state.

My guess is that you have to work in both ##\theta## and ##\phi##, and integrate with the proper integration element, ##\sin \theta \, d\theta \, d \phi##.