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Everything posted by J.C.MacSwell
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A not so small discrepancy in Relativity of Simultaneity
J.C.MacSwell replied to Truden's topic in Relativity
You are trying to construct an event that can happen simultaneously in both reference frames at more than one location along the direction of relative travel and realize it does not work...this is just as SR would predict...not going to happen -
Space (s) -the third form of matter
J.C.MacSwell replied to Dr. Charles Michael Turner's topic in Speculations
Probably why the agnostic dyslexic insomniac stayed up all night...wondering if their really was a doG... -
The science of gear ratios seems like Magic to me.
J.C.MacSwell replied to eurekajo's topic in Classical Physics
They simply ignore the mass as they are assuming it's effect is insignificant for the results they are looking to obtain, similar to assuming no friction. When a gear is massive and accelerating (or decelerating), or unbalanced, the effect of the gears mass can be significant. So you might be being impractical in wanting to consider it, but you certainly aren't wrong. -
The science of gear ratios seems like Magic to me.
J.C.MacSwell replied to eurekajo's topic in Classical Physics
Do you feel you have a good intuitive understanding of how levers work? The principles are very much the same. -
Off-topic hijack from What is Space made of?
J.C.MacSwell replied to Albert Einstine's topic in Trash Can
That has been recognized for almost as long as the term has been in use...I guess we all are a bit like 10 year olds in some ways... -
So...your theory is "whatever the experimental results say, assuming mass decreases with increasing temperature, which I am pretty sure it does"?
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If a company or business can be a legal person, why can't a river?
J.C.MacSwell replied to studiot's topic in Earth Science
My company is hoping to get out of jail fairly soon...yearning for more than just the conjugal visits with one of it's suppliers.... -
I know. I was there in the studio when they set up the (hidden, they thought that was best) fan for the flag. I argued against it but they wouldn't listen. Some of these guys had PhD's in physics and Engineering...they were all about the "dramatic effect" they were all spouting. I was young at the time and who was I to argue against guys who had helped out Oswald just 6 years earlier.
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Very clever young man...very clever! But it's rubber sheets and weights all the way down!
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(At some point I have to get better at showing the math on the computer) In physics you will come up against that, and the fact that you are suggesting a mechanistic model without defining the mechanism (how the moving space interacts with the matter, in particular comparisons at varying velocities in the same position) Accelerations aside, compare the velocity of the inflow at 2r (1/4 of that at 1r based on continuity) to the escape velocity at 2r (1/square root 2 of that at 1r). Or is that too difficult?
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I know you kind of said otherwise, but are you looking for something like a mainspring (clockwork spring)? It is contained in such a way as to store compacted potential energy. https://en.wikipedia.org/wiki/Mainspring
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Maybe not the shock per se, but both maximum shear loads and bending moment get transferred there from across the bottom. Maximum tensile stress can occur on the inside at around that point (perimeter) depending on shape and thickness.
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Many times I have done a very similar trick with beer or wine bottles full of water, where I push a finger in it to hold a bit of pressure with a good seal then pull the finger out creating a negative pressure up until the seal is suddenly broken. Just like with cavitation the damage is done on the collapse, not creation, of any bubble. The bulk modulus of water is quite high and creates a shock to the brittle glass from the high peak forces. That bottles tend to break around the perimeter of the base but never perrfectly
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...and the follow up question: "which has more mass?"
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So near Earth surface, distance 1r from Earth centre, your model has: inflow of space at 11.18 km/s and acceleration of that inflow at 9.81m/s2 What does it have at 2r?
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Any fields affecting the space within the empty box that might effect moving the side? Did the Daemon get any outside assistance from pressure on the side he moved? (negative work).
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Acceleration is change in velocity with respect to time, not distance.
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I have a big test coming, and i still dont undertsand this.
J.C.MacSwell replied to john2017's topic in Homework Help
I think an examination of the trade winds might be a good place to start: For more context: What course is it? https://en.wikipedia.org/wiki/Trade_winds -
I think it's the velocity that changes proportionally to the inverse square of the radius.
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In a simple, steady state flow model in 3 dimensions, at a given distance from the centre the flow should be accelerating at 1/2 of what it is at half the distance (inverse relationship...goes up by twice as it moves to half the distance) With gravity the acceleration is 1/4 that of half the distance. (inverse squared relationship...goes up by 4X as it moves to half the distance). So for the acceleration to more than double you need more space accelerating than you have a supply of...
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You are using gravity as an explanation of how it works.But what, in the model, causes both objects to accelerate at 9.81 m/s²? How is the acceleration imparted? They both need 9.81 m/s² but totally different flows to impart it...unless...what? Other than hand wave "works like gravity". (if it's nothing imparted but just "space removal" why more and faster for one object than the other? One would require more of a reduction of space in the same time frame) With your model (steady flow) space is inflowing and accelerating toward the centre. But unless it is expanding as well the acceleration will not follow an inverse square law (the velocity would). Where does the extra space come from to allow it?
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So steady state (not increasing overall, but just as it gets closer).In the funnel analogy, or your hypothesis, if something arrived with the flow from a distance (say dropped from well above the cliff), how would the movement compare to a second particle released at the cliff edge as the first particle arrived? And why?