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Newtonian mechanics defines its terms precisely. A "particle" is that upon which elementary forces act, and which exhibits unary reactions. A "system" is a collection of particles related by mechanics described in the laws of motion and other physical laws. We may reckon some of the physical phenomena of mechanics in terms of net effects, summed across the system. We can also describe different values for those same properties confined to their behavior within the system. Until you understand this, you cannot properly reason your way through Newtonian problems. A mass on a scale in a gravity field describes a system composed of the mass, the scale, and the Earth. When you lift the weight off the scale, you have introduced a force that is external to the system. There is no expectation that momentum will be conserved in that frame of reference. In a different frame of reference, the weight, the scale, the Earth, and you comprise a larger system. If you lift the weight off the scale, the net momentum of that system remains the same despite the velocity and position information of particles in that system having changed. There is no expectation that momentum will be conserved among all particles in a portion of the system. That is, how you specify the system is of utmost importance. |
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See also "No one I know voted for Nixon." |
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Any chance of an answer to this question, Gingervytes? |
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Is there any important difference between a balloon and a rocket? |
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One of the posters asked you a question, what are all those dishes pointing at if it isn't satellites placed into orbit, or how does GPS work. You aren't a flat Earther by chance, because from what I've read it seems like it. We should go into that stupid idea as it isn't on task with your OP, just curious. |
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Since a pointless digression can only improve this thread, there was an amusing comic in the Order of the Stick webcomic, in which the party fighter went to a weapon shop to buy a polearm, and every one he asked for was out of stock for various reasons. "Glaive?" "Guisarme?" "Glaive-Guisarme?" "Guisarme-Glaive?" "Glaive-Glaive-Glaive-Guisarme-Glaive? "I think you're drifting into another sketch, sir." |
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Again, the laws of motion are universal. You have agreed that fluids have mass, and therefore that the motion of fluids must have momentum. Newton's third law applies to systems in which that momentum is a factor. You have attempted to evade that by defining a rocket as a system that does not include its propellants. I have corrected that by giving you the appropriate definition of a system according to Newton, such that the law holds. So far you seem unable to explain, under the proper definitions, why Newton's third law should not hold for rockets. |
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Few years back I was on a Ticonderoga Class Cruiser that fired a missile into space to take out a satellite.
What the hell did we shoot down? Now I'm worried. |
Still waiting on an answer to this question:
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Don't be bashful. |
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Dave |
Also how do things like GPS and Satellite Radio and Cell Phones work if there's no space? Basically any over the horizon... anything. Or are they all myths too?
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And the thing is I spend a lot of my navel career patching into satellite communications. I was an IT it was one of the main parts of my job. Satellite access request, antenna maintenance, solar weather reports.
Kind of wonder know what I was doing all those years. |
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Also think about the political implications of this. For the entire space industry to be wrong... literally everybody has to be in on it. The US, the Russian, the European Space Agency, India, Japan, China... all have to be in on it completely and practically every country on Earth is gonna have to be in on it at least a little.
So basically all politics is a lie because all these countries really secretly behind the scenes get along enough to keep perpetrating this myth. So basically we've also solved world peace, as all the fighting and political saber rattling has to be for show because no one is gonna risk one of the other "LOL Space Faring LOL" nations from getting mad enough to let the cat out of the bag. |
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Why if "All of modern history, at the very, very least since the dawn of the space program (and that would bring World War 2 in questions since so much of the space program is a direct off shoot of missile and rocket development of that conflict, but if you call World War 2 in question you have to call World War 1 into question since they are directly linked conflicts, but World War 1 happened largely because of the complicated social-political structure of treaties and agreements brought about after the Napoleonic Wars and so forth and so forth back to the dawn history basically) has basically been a complete and total lie because politics we know it can't exist because rockets don't exist" focus on the "Rockets don't exist" part of that? |
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Hans |
When do we get our shill hush money?
Also how does everyone categorize their shill hush money for tax purposes? I don't want to pay anymore taxes on my shill hush money then I have to. |
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But the IRS? Are you crazy? |
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IIRC I watched the radar image of that test, blowing up the satellite that was in orbit your rocket. :cool: |
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We know that ships work inshore because we can all watch them sailing. But imagine if your instinctive belief was that they only stay afloat because when the ship settles down into the water, it increases the pressure between its hull and the seabed, and that gives the hull something to push against which holds the ship up. If it sailed beyond the continental shelf into deep ocean there would be nothing to push against and the ship would just sink. |
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I mean... that totally not how it works and it's certainly not true that all the Navies in the world are just party boats that go about an hours away from shore, drink cheap beer for a few months, and come back in and tell you about all the cool wars we've been fighting. No sirree certainly not true. *Whistles* |
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