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Re: Gravity...what?
| quote: | Originally posted by djSlain
Think of a swimming pool that is the size of the universe. Whether there are boundries, i don't know, but lets just say there is a maximum. Now throw a tennis ball into the water. what do u notice? Well, the tennis ball is floating about halfways into the water. Now get a big beach ball and do the same. Now u see that the beachball is about a quarter of the way (or less) into the water.
Pressure. Once again think of a swimming pool. If u put the a ball into the water, the water will rise. But since there are boundries that will not allow water to seep out, pressure builds up. Pressure builds up, and the ball will feel the stress. Pushing on all sides of the ball to the very center.
If there is a maximum to the size of the universe, and we know that matter can not be created or destroyed (only transformed), pressure is pushing us down on earth, or any planet. The less matter that a planet (or moon or whatever) takes up, the less pressure that pulls toward its core. Small planets have weaker pressure than a huge planet which will have a strong force of gravity. So we shouldn't look into the center of the earth to see if there is energy PULLING us to the floor, but to the pressure in space PUSHING us down.
eh? |
actually, i do believe in gravity
coming to conclusions based on a flawed analogy can get you into trouble
and thats not even to mention the fact that it assumes the universe is finite
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