PeroK's latest activity
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PeroK replied to the thread Being bad at Physics.If you have some natural ability in science and mathematics, does that mean you don't enjoy posting on here? Or, do you enjoy posting... -
PeroK reacted to PeterDonis's post in the thread A A global energy conservation law in general relativity with
Like.
What I said in my last post is what you'll find in many GR textbooks: MTW and Wald, for example, to name just the two best known... -
PeroK reacted to PeterDonis's post in the thread A A global energy conservation law in general relativity with Like.
No. Neither of them do. They're not tensors. The factor of ##\sqrt{-g}## means that, in technical terms, they're tensor densities (I...
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PeroK reacted to PeterDonis's post in the thread A A global energy conservation law in general relativity with Like.
Is also a mathematical convenience in the case we're discussing (a stationary spacetime). It lets you write the Komar integral in an...
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PeroK reacted to Kostik's post in the thread A A global energy conservation law in general relativity with
Sad.
Dirac seems to disagree. Here he is discussing the energy-momentum pseudotensor ##{t_\mu}^\nu##, and ##{Y_\mu}^\nu## is just the mixed... -
The problem needs to be fixable within a viable remediation period. E.g., if the target time interval for a particular task to be...
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Ideally, yes: love what you do and make sufficient money at what you do. But such is not always reality. Many jobs are typically...
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"Talent" = "natural ability". Although it's not politically correct to say so, people are not born equally adept at every endeavor.
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No, because a "Planck size sphere" by definition has a very small but finite size. The big bang singularity has zero size.
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Imagine taking all the matter and energy in the universe and squeezing it into a point of zero volume. That's essentially the idea of...
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PeroK replied to the thread I Big bang balloon?.A singularity is not a physical thing. It's where the mathematics breaks down.
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Here is quick explanation : The Balloon as Space-Time: The balloon's surface is analogous to a two-dimensional representation of our...
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I do! How hard and what kind of hard, too difficult to say. Designing something like "Let it Be" is not completely reliant on what is...
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Of course, talent and hard work are not independent. Frequently someone who is innately talented also works very hard at their talent...
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PeroK reacted to martinbn's post in the thread Suggestion Show pronouns of a person? with
Informative.
Well, according to the Merriam Webster dictionary the meaning is: He 1: that male one who is neither speaker nor hearer 2:used in a...
