PeroK's latest activity
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PeroK replied to the thread Alien life, probabilities, and interstellar propagation of human life.I don't see any evidence that this is more than sci-fi fantasy. Yes there are (technological barriers). There is no technology that... -
PeroK reacted to phyzguy's post in the thread Alien life, probabilities, and interstellar propagation of human life with
Skeptical.
I think the Fermi paradox is different than what has been stated here. I think it goes like this: (1) We can already envision our... -
PeroK replied to the thread Alien life, probabilities, and interstellar propagation of human life.I guess it depends on how the Sun-like stars are distributed. The current estimate seems to be about 5-10 billion Earth-like planets...
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PeroK reacted to BWV's post in the thread Alien life, probabilities, and interstellar propagation of human life with
Like.
My simple calc was 60k stars within 100ly out of 100 billion potential, but that would have an upper limit of around a million... -
PeroK replied to the thread Undergrad My basic understanding of set theory.To understand the concept of infinity in mathematics, you could start here: https://en.wikipedia.org/wiki/Infinity
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PeroK replied to the thread Undergrad My basic understanding of set theory.Define "larger".
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PeroK replied to the thread Alien life, probabilities, and interstellar propagation of human life.It's more like tens (or perhaps hundreds) of thousands. With millions of civilizations, randomly spread, there would be a high...
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PeroK replied to the thread Alien life, probabilities, and interstellar propagation of human life.Another point I would make is that saying that the observable universe is "teeming with life" is not a very useful conclusion. If, say...
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PeroK replied to the thread High School Need tips to understand Relativistic Energy in Special Relativity.An integral is an antiderivative. The only thing you need to check is that: $$mc^2\frac d {du} \bigg...
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PeroK replied to the thread Introduction: Non-physicist with speculative questions.If you are interested in Multiverse theories, you could start here: https://en.wikipedia.org/wiki/Multiverse
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PeroK reacted to sophiecentaur's post in the thread High School Does acceleration affect impact energy vs constant velocity? with Like.
Possibly momentum in the wrong direction - the best sort for New Year
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PeroK reacted to Ibix's post in the thread High School Need tips to understand Relativistic Energy in Special Relativity with Like.
I think this is the integral you are attempting to compute. If so, I'd do it by inspection. For any integrand with a ##1/f^n(x)## it's...
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PeroK replied to the thread Distinguishing Mathematical Consistency from Physical Realizability.You do, however, throw lots of words together to say something simple. For example: All that says is that we need a time parameter to...
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PeroK reacted to QuarkyMeson's post in the thread Undergrad Which-Path from Global Momentum Measurement in Double Slit with Like.
This is basically what you're asking: https://arxiv.org/pdf/cond-mat/0101157 A global momentum measurement of the screen only yields...
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PeroK reacted to BillTre's post in the thread Alien life, probabilities, and interstellar propagation of human life with Like.
The Fermi paradox is specifically about advanced life able to make contact with us. This is different from the origin of life, but life...