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MattRose
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Do you have some quotes where anyone claims it's a push? Gravity is an attraction which would always be a pull, right? Acceleration could be considered a pull or a push.
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- Jun 18, 2006
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I think that at the level of physics you need to answer the question the question it's self has lost meaning.
Mass attracts mass. The maths will just show you what happens. It will not say why it happens in a motivational scense. At some point you will get the statement "because that's how it is".
Mass attracts mass. The maths will just show you what happens. It will not say why it happens in a motivational scense. At some point you will get the statement "because that's how it is".
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MattRose
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Did not see anything about gravity pushing on that link. Only a headline that asks "Does Gravity Push, or does Gravity Pull ?"
That site seems to ask the question as though someone suggested it pushed, but I didn't see anything that said anyone said gravity pushed.
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its like when he said that that has to be at least five hours of daylight or nothing will grow. These facts come from a parallel universe of the imagination.
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DontTreadOnMike
Eddaic Literalist
Einstein doesn't say it's a push. Gravity is not a force. It is the curvature of space caused by the presence of energy (mostly mass). Everything always travels in a straight line through space (unless it bumps into something). But what is a straight line? If we draw a straight line on a piece of paper and then bend the paper, that line is still straight from the point of view of the 2-dimensional world of the paper. But if you zoom out into the 3rd dimension we can see that the space the line was drawn on is itself curved.
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Wiccan_Child
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They say neither. Newton said it's a force, a change in momentum proportional to mass and distance. Einstein said it's an observed consequence of warped spacetime.
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Jazer
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It is a scientific thoery that they do not agree on the details but everyone seems to accept anyways.
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Jazer
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When you buy a plant the label will advise you how much sunlight you need to grow the plant.
You must have never done any gardening or you would know that some plants do not grow in the shade.
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pgp_protector
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When you buy a plant the label will advise you how much sunlight you need to grow the plant.
You must have never done any gardening or you would know that some plants do not grow in the shade.
But some can grow (though not well) without any sunlight
Cave flora
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Wiccan_Child
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Mass attracts mass. Mass imparts a change in momentum, accelerating other objects of mass towards it. Whether you want to call that a 'push' or a 'pull' is a matter of semantics, and doesn't really change anything.
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When you buy a plant the label will advise you how much sunlight you need to grow the plant.
You must have never done any gardening or you would know that some plants do not grow in the shade.
Your original statement was that five hours of sunlight was needed for ANYTHING to grow.
And in the process you were saying that if the earth were spinning faster than to allow for five hours, nothing would grow...forgetting that it would be five on five off and things would grow fine., getting more than 10 hours light in every 26.
Would it be so hard to just admit you are wrong instead of posting charts and implying that i dont know any biology?
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DontTreadOnMike
Eddaic Literalist
That was Newton's view. Einstein's view is that gravity is not a force so it's not a change in momentum or an acceleration and nothing is actually being attracted. When falling or orbiting (which is the same thing really) you're moving in a straight line and at a constant speed through curved space. Standing still on the ground is actually the acceleration. Think if you're riding in a car in a straight line and all of a sudden the driver veers to the left. The feeling of the door pushing on your right shoulder is exactly the same as the feeling of the ground pushing on your feet. The feeling of free fall actually comes from the ABSENCE of the acceleration we're used to.
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Wiccan_Child
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Weeeell, not exactly. In free fall, we are accelerating. If I go skydiving, because I'm accelerating downwards without any hindrance, I'm freely falling - I'm in free fall. Satellites in orbit are in free fall. But free fall is simply accelerating under gravity without anything like the ground to stop you. The lurching in your stomach you get when in free fall isn't to do with the unusual absence of acceleration, but with the conspicuous presence of acceleration. After all, sitting on my computer chair, I have no net acceleration, so, according to your logic, I should be experiencing the feeling of free fall
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DontTreadOnMike
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Weeeell, not exactly. In free fall, we are accelerating. If I go skydiving, because I'm accelerating downwards without any hindrance, I'm freely falling - I'm in free fall. Satellites in orbit are in free fall. But free fall is simply accelerating under gravity without anything like the ground to stop you. The lurching in your stomach you get when in free fall isn't to do with the unusual absence of acceleration, but with the conspicuous presence of acceleration. After all, sitting on my computer chair, I have no net acceleration, so, according to your logic, I should be experiencing the feeling of free fall
I dunno that's just the way it was explained to me by physicists on the AskScience section of Reddit. Just because you're moving toward the earth doesn't mean you're accelerating. It just means you and the earth are both taking straight lines through space that happen to intersect. And when your paths do intersect, the earth tends to change your direction and momentum (sometimes with gruesome results, depending on how far away you were when you started falling toward the earth)
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