PeroK's latest activity
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PeroK replied to the thread B Conservation of kinetic energy in expanding space.Energy is frame dependent. There is no such thing as "the energy of an atom" in any absolute sense. There is the ground state, which... -
PeroK reacted to TensorCalculus's post in the thread The Guardian Investigates Student Use of ChatGPT for 18 months with
Like.
Even with a younger age group, in a school which prides itself on academic excellence, this can be seen. Here's my experience with my... -
PeroK reacted to gleem's post in the thread The Guardian Investigates Student Use of ChatGPT for 18 months with
Informative.
I posted a remark on a MIT study of the effects of the use of AI on students in the thread; Is AI hype? -
The airport shuts down. That's not an AI -specific thing, we're already there with the computers we have...
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I thought this was an interesting article that some of you may enjoy. It begins with: After finding the homeschooling life confining...
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PeroK reacted to XxhaathimxX's post in the thread Studying Skipping Chapters in Stewart’s Calculus? (Pearson's Edexcel IAL Background) with Like.
Hi everyone, I’m planning to self-studying physics using Young & Freedman’s University Physics alongside Stewart’s Calculus (Early...
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PeroK reacted to jbriggs444's post in the thread B Conservation of kinetic energy in expanding space with Like.
The easy answer is that energy is not conserved in an expanding universe. The law of conservation of energy follows (via Noether's...
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PeroK replied to the thread I Can entanglement swapping be explained without nonlocal influences?.I think I've only ever understood about two or three of Fra's posts!
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PeroK reacted to Herman Trivilino's post in the thread B Understanding Newton's Third Law and the Net Force on Objects with Like.
It is not. The normal force exerted on an object by a surface and the normal force exerted on that surface by that object are Third Law...
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PeroK reacted to JimWhoKnew's post in the thread I Validity of identical eigenfunction of commutating operators with Like.
So which one is not Hermitian in my example, ##I## or ##A## ? Edit: for 2 commuting observables there is a basis in which they are both...
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PeroK reacted to JimWhoKnew's post in the thread I Validity of identical eigenfunction of commutating operators with Like.
Consider$$A=\begin{pmatrix}1&0\\0&2\end{pmatrix}$$and the identity ##2\times2## matrix ##I##...
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PeroK replied to the thread I Validity of identical eigenfunction of commutating operators.Nothing. All eigenvectors of ##L_z## are eigenvectors of ##L^2##. But there are eigenvectors of ##L^2## that are not eigenvectors of...
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PeroK replied to the thread I Validity of identical eigenfunction of commutating operators.All Hermitian operators commute with ##I##. And every vector is an eigenvector of ##I##. This is wrong. There must be a common...
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PeroK reacted to fresh_42's post in the thread The Guardian Investigates Student Use of ChatGPT for 18 months with Like.
The topic is real and worth discussing. Even at PF, I read many introduction posts that answer the question of how they found PF through...
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PeroK reacted to Lord Jestocost's post in the thread I Is there any interpretation of QM that doesn't clash with intuition? with Like.
An event localized in space and time is appropiately amplified to bring it to the attention of the experimenter.
