PeroK's latest activity
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PeroK replied to the thread Why Are You Still Here? A Curious Question.Looking for a job. -
PeroK replied to the thread Alien life, probabilities, and interstellar propagation of human life.Yes, that's possible. Professor David Kipling has some lectures and videos on this. For example: -
PeroK replied to the thread Paul Hinds has passed.First V50 and now Phinds. Sad news indeed. -
PeroK replied to the thread Undergrad Ambiguity of the term "indefinite integral".The indefinite integral is an equivalence class of antiderivatives. The integral ##\int_a^x f(t) dt## is a function of ##x##. Or, a... -
PeroK replied to the thread Incredible Difference in Ant Sizes."How did he die doc?" "Any one of five ways. His skull was fractured, his chest was crushed, his neck and back were broken, and he had... -
PeroK reacted to Office_Shredder's post in the thread Undergrad My basic understanding of set theory with
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A countable union of countable sets is countable. This means when you say hey I've got infinity infinities, that's gotta be a bigger... -
PeroK reacted to GlitchedGluon's post in the thread High School How does this derivative work? And why the speed of light remains? with
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If you take the derivative of that, m just "gets out" because it is constant: $$dp =m \, \, d... -
PeroK replied to the thread High School How does this derivative work? And why the speed of light remains?.Note that you can avoid the differentiation, by expressing ##v## as a function of ##p##: $$p = \gamma mv \implies v = \frac p {\sqrt{m^2... -
PeroK reacted to GlitchedGluon's post in the thread High School How does this derivative work? And why the speed of light remains? with
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But the mass does not dissapear, you have it right there in your expression for K. c is the speed of light, it is a constant. -
PeroK replied to the thread Undergrad Practical cosmic speed limit for macroscopic objects?.It was a good example of what is realistic. Anything resembling the Enterprise is far beyond any engineering reality. -
PeroK replied to the thread Undergrad Practical cosmic speed limit for macroscopic objects?.The project is aiming for a speed of 0.2c. Moreover, it's a one way journey, with no possibility of return to Earth. And it's a "nano...