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Everything posted by swansont
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I don’t see how you reach this conclusion. Who said debate and investigation are not justified? On the contrary, we’re begging for you to legitimately investigate, instead of the shoddy hand-waving that we currently get. For actual scientific data, instead of de facto attempts to get a waiver from scientific rigor. What’s stopping you, and other like-minded folks, from investigating? Is complaining about having to live up to scientific standards too time consuming? The problem, it seems, is you want others to investigate, and yes, you need to come up with something to motivate most scientists to spend time (and money) on someone else’s pet project. Most scientists have their own research to do.
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It sounds like they “withheld” evidence after he stopped working for them, which is…unexpected behavior? My former workplace has not shared information with me since I stopped working there. There is information that would be illegal for them to share with me. It also sounds like your beef is with the Air Force. They are a military organization. But the paradigm here is that “aliens” is not a scientific answer until there is evidence to support that conclusion. The null hypothesis is that aliens do not exist. This is no different than elsewhere in science. So charging someone with finding an explanation that fits with mainstream science is perfectly reasonable, since the default assumption is that these phenomena are not of alien origin. You can only entertain that possibility after all other explanations have been eliminated. Again - just as with the rest of science; experiments have to rule out all confounding effects that might be responsible for a result The real question is why folks who claim aliens (or bigfoot, whatever) exist think that these rules don’t apply to them. (I think lack of awareness of the rules is a likely suspect)
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TheCosmologist has been banned for sockpuppetry. We’re convinced he was Gareth. (which they basically confirmed)
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You need to work on paying attention to detail. Nowhere in the part you quoted did I use the equation F = ma I agreed that there is a term in there that is m dv/dt, which is a force. They derived this by looking at the momentum of the rocket of mass m has as the result of ejecting a mass ∆m. They did not arrive at this by applying F = ma In Newtonian physics, when considering conservation of momentum, mass can't change. Once you have defined the system (mass M) you can't change it. If a mass m2 is ejected, for example, leaving mass m1, you have to consider both masses, m1 and m2 = (m1 + m2 = M)
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There is no time dilation (split from The twin Paradox revisited)
swansont replied to Boltzmannbrain's topic in Speculations
Yes. "Relativity" means that some quantities, like time, are relative to the frame you are in. IOW, what you measure and what someone in another frame will measure, will disagree. In your own frame, your own clock ticks once per second. Your meter stick is a meter long. But there will be disagreement on how many seconds passed, and how far you traveled, when comparing to some other frame, because these are relative measurements. -
! Moderator Note You have not established that this happens. You can’t ask how something happens while begging the question of whether it does.
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No, because that’s not where it’s derived. It’s derived from conservation of momentum, and they divide by delta t, which they make into a derivative by taking the limit as delta t becomes small, just as clearly they explain. equation 1.3 through equation 1.5 Well, that simplification is wrong.They say it has dimension of force. The reason it’s a force is because it was arrived at by taking the time derivative of momentum, which is force, which they explained in equation 1.2. No. They didn’t apply F=m dv/dt, they derived it, and identify it as the reaction force
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They refer to them as forces because they are. They took momentum and applied dp/dt to it. dp/dt is a force, despite your insistence to the contrary. This is quite clearly spelled out in the derivation. What they did not do is apply F=ma to anything with variable mass. I don’t know how you can claim that they are.
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Referring to someone with other than their user name is poor etiquette, and a de-facto accusation of them being a sockpuppet is both off-topic and also a bad-faith post - they might not be. Rules violations should be reported. Let mods figure it out.
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There is no time dilation (split from The twin Paradox revisited)
swansont replied to Boltzmannbrain's topic in Speculations
The clocks in the Hafele-Keating experiment did not run at the same rate as the ground clocks. As such, they accumulated a different amount of elapsed time. GPS oscillators are adjusted to run slow on earth so that they run at the correct rate in space, to match the ground clocks. Time does not flow at the same rate for everything. -
No, they showed there was no electron dipole moment at some level. The article doesn’t say, because it’s a pop-sci report about the experiment. Which is why it uses language that a lay audience might identify with. I thought you were here to discuss physics, not the watered-down verbiage used in press releases and articles like that. How could a point charge have a dipole moment? I wasn’t aware Einstein was so involved in QM. Citations, please.