swansont

! Moderator Note As the requested summary/abstract has not been posted, this is closed. Do not post anything similar. (I'd say don't post on this topic, but it's not clear what this topic is)

They have momentum, individually. The system does not, because the earth moves imperceptibly toward the dropped mass, with the imparted velocity being inversely proportional to the mass. IOW, the dropped object of mass m acquires a speed v, so it has a momentum mv (downward). The earth has this same momentum upward, which is also MV (M being the mass of the earth and V being its velocity) mv = MV so the earth would have a velocity of V = mv/M in the upward direction But the object's mass, be it 1 kg or 100 kg or 1000 kg, is so small compared to the earths mass of about 6 x 10^24 kg that there is no way to measure V. For all practical considerations, the earth remains at rest. (a similar argument applies to the sun, whose mass is about 2 x 10^30 kg, and any small object interacting with it) When you move out of a gravity well you would slow down, because of gravity, absent any independent propulsion. For an individual object, momentum is conserved when there is no net force acting on it, so it would not apply to such an object subject to gravity.

So, not "cancel culture" but another example of political buzzword-pimping (from https://www.washingtonpost.com/politics/2021/11/15/most-republicans-oppose-teaching-kids-about-lingering-effects-racism/ ) Things like this, or migrant caravans, or whatever the manufactured outrage du jour is, gets played up in the media - especially right-wing media - whenever the base needs to be riled up So hey, if you are getting backlash from something you said or did? Blame cancel culture to deflect the controversy away from yourself. Attack anyone trying to hold you accountable for your actions or words.

Mass typically drops out of these calculations, at least when you analyze the simplest systems. It will come into play because you can't treat it as a point object, but that might or might not be a large factor. As I recall, the object had rotational motion, and if that changed, you'd need to account for the energy and momentum. But as far these factors can be ignored, the mass won't matter. A baseball or an asteroid would have the same motion. If the sun were accelerating in some strange way we'd be accelerating along with it. Our motion about the sun and around our axis is analyzed with significant scrutiny. Such an acceleration would be noticed if it were large enough to matter.

You assume the sun it at rest and find the motion relative to the sun. They are in different frames, because there is relative motion. But if the motion is inertial, you can treat either as if it were at rest, and all of the physics will be the same. If one is accelerating, you'll see evidence of non-inertial motion (which we already have; Oumuamua felt an acceleration from the sun, regardless of any self-propulsion) The sun, being much more massive, would only have a tiny acceleration, which can safely be ignored, since we won't have the precision in the data to discern it. If you do the analysis in the sun's frame of reference, it simplifies everything.

I say it does (and this is what physics tells us), since you have a wave that has a characteristic size of its wavelength, and you apparently have no explanation or example of a localized wave to offer. Is that supposed to be an answer? If the light passes through a vapor cell it has not interacted. It has nothing to do with its destination. No link to the article, or a citation; the paper is also on ArXiv. https://arxiv.org/pdf/1007.0104.pdf And if you read further, you find that they didn't expect to find any evidence. Sometimes you do experiments where the expected result is small, on the off chance that you find something, showing the model to be wrong, and discovering new physics (I have been involved in such experiments, No, we didn't find any new physics.) "This cross section is extremely small in the optical domain where high brightness sources exist" Their results placed an upper limit of the cross-section, but that was still ~18 orders of magnitude larger than the QED prediction. So this is NOT an example of "Many have claimed that photon particles should collide and scatter when laser beams cross" since they acknowledge the cross section is very small. That's a dodge. "Anyone" didn't make the claim, you did. But of course you are. Even if one subscribes to "it's a wave and only a wave" light has energy, light exists, and light is not matter. Unless you want to construct a whole bunch of new physics, which you haven't done, this doesn't wash.

You can get a pretty good solution with just Newton's laws of motion and Newtonian gravity, as long as there were just the two bodies. Which is a reasonable approximation absent any close fly-by of a substantial body. The sun can be treated as if it were at rest; any deviation from an inertial frame can be ignored. People can predict comets pretty well

The trend toward authoritarianism predates any current economic stress and the pandemic, though. Parts were in place even before TFG ran for office. Politicizing masks and vaccines, and other pandemic-related issues are only a part of the overall picture, and just a convenient tool being used as leverage.

In a sense that's what's happening, owing to the expansion - it becomes redder, meaning it has less energy. But if you mean can it lose energy via some interaction with matter, that's scattering, which tends to change the direction of the light. By virtue of the light getting to us, without being smeared out, we know it hasn't done that. Specific refutations would require the models to be presented, so one could compare predictions with data. A detailed model would be able to predict how the redshift would occur and quantify the effects. People have proposed tired light models, and they don't fit with the evidence http://www.astro.ucla.edu/~wright/tiredlit.htm

ravell has been banned as a sockpuppet of Bart and bart2

US television saw > 500 new shows + miniseries in 2020 (and 2019, so it's apparently not an anomaly) Just over 1% is hardly an explosion. It would be strange of that genre wasn't explored to this minimal extent, with all the shows being made.

This is an accelerometer using a proof mass. I’m familiar more with attempts using atoms as a proof mass, http://ridl.cfd.rit.edu/products/pfq2 speaker videos/slides/PfQ2 July 2020 Choy.pdf Start with slide 6

But you can do a measurement to see if you’re the one accelerating. If I toss a ball to you and we’re on a platform with perpendicular acceleration, the ball will deflect in the opposite direction. (This principle is used in some inertial sensor designs.)

While velocity is relative, acceleration is not. You can tell if you are accelerating.

tar has been suspended for repeatedly bringing up a pet theory (from a locked thread, no less) in mainstream discussion, and failing to post in good faith (opening up a mainstream thread to bring up the pet theory)

! Moderator Note If you are able to explain the idea, you should have done so when you had the chance. But you did not, and continuing to raise this issue is against the rules. You can insist that you understand relativity, but the evidence is that you do not.

Not periodic motion, as such, since motion is not directly implied. (it’s inferred by imposing classical notions on QM, and that usually ends up causing problems) QM avoids saying anything about trajectories in situations like the particle in a box. It’s one of the things that distinguishes it from classical, and also why free body diagrams are not part of QM.

Didn’t say it was. But generally a society converges on a set of laws. And is it the same as dogs? And for the same reasons? This wasn’t the issue. Also not the issue.

The purpose of the box is to provide the boundaries of confinement, so that have nodes for the wave function and you get quantized energy levels. You get isolation from the environment by not including any interactions, because it’s a physics problem and there’s no mention of any other interactions. It’s not like it’s an actual experiment. It’s a generic particle in a box; we aren’t told if it’s subject to the EM or the strong interactions, (or gravity, for that matter) because it’s irrelevant to the problem what the confinement is due to. The potential term in Schrödinger’s equation doesn’t specify the source of the potential.

The primary reason is that we aren’t 100% certain they are guilty? No other difference in how society treats people vs how we treat dogs?

Matter heavier than U is undoubtedly created in these events, and mergers. But we’d have to detect it before it decayed away, as exchemist notes, unless there’s some method of continued production. This has happened (We’ve had threads on this) https://en.wikipedia.org/wiki/Przybylski's_Star Przybylski's Star also contains many different short-lived actinide elements with actinium, protactinium, neptunium, plutonium, americium, curium, berkelium, californium, and einsteinium being detected.

Energy quanta that are localized in points in space. Is that a description of a wave? Because I can detect it after passing through a vapor cell, for instance. https://en.wikipedia.org/wiki/Two-photon_physics “In pure vacuum, some weak scattering of light by light exists” So I guess we’re done. “many have claimed”? That’s weak. Who has claimed this? Where are the citations, so the specific claim can be examined?

There are invariant quantities, so this is obviously false What relevance does this have to anything? ! Moderator Note This sheds no light on your claims or on outstanding questions. Just more hand-waving. Closed. Don’t bring this, or anything with such weak support, up again

Plenty of scientists understand this without considering the idea of “two nows” The shortcoming, it would appear, lies with your understanding of relativity. Perhaps you should consider addressing that, and not bringing up the speculations topic that’s been locked.

It’s both. A floor wax and a dessert topping. You have a process of entangling particles or creating particles that are entangled, and you have the state of entanglement Regardless of whether this can be demonstrated, “I don’t see” is not an argument that carries much weight. It’s argument from personal incredulity