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is it being pulled or pushed to the surface?
Quote from: gazza711is it being pulled or pushed to the surface? I can't believe that you asked me this question in reply #9 since I just answered it in reply #8, i.e. the part that you quoted. So why on Earth id you ignore it?Do you even know what those terms, i.e. push and pull mean?
Quote from: gazza711 on 20/06/2015 20:23:29and the others?Arent whales mammals?To the best of my knowledge, all whales and all correpondents to this forum, know that water and air do not "have the same characteristics".
and the others?Arent whales mammals?
Ok.so air and water have similar characteristics.theyre breathable,use convection to help create movement,you could swim in air(drag),water is part oxygen.any suggestions on more similarities?
Quote from: gazza711 on 25/06/2015 14:19:58Ok.so air and water have similar characteristics.theyre breathable,use convection to help create movement,you could swim in air(drag),water is part oxygen.any suggestions on more similarities?Every fluid has drag and can convect. Oxygen is the most common element on Earth (by mass). You're really grasping at straws here. This is not at all scientific. Water and air are also both transparent in the visible region (but so is glass, diamond, polycarbonate plastic, hydrofluoric acid, etc. etc. etc.), but that has nothing to do with gravity... Water and air both have mass (so does pretty much all matter), and that does have to do with gravity, but isn't very helpful. Water and air are both fairly nontoxic (you can drink enough water to kill you, enough nitrogen will result in narcosis, coma or death, too much oxygen is neurotoxic and carcinogenic...)
surely 7lbs/sq inch of downforce with an atmisphere that is 100k feet high that has mass must contribute to something.
Ok.are attracted or repelled then as the other words are incorrect.dont answer without self evidence.
Quote from: gazza711Ok.are attracted or repelled then as the other words are incorrect.dont answer without self evidence.So, you think that the difference between push and pull is the direction of the force. Suppose that we use the electric force as an example so as to illustrate your point about being pushed and pulled.Let there be two large sheets of charge parallel to the xz-plane. One has a positive charge density that passes through the y-axis at y = +d, the other having a negative charge density that passes through the y-axis at y = -d. There is an electric field in the region -d < y < -d. Place a positively charged particle in the region -d < y < +d. In between the plates there is a uniform electric field directed in the +y direction. Outside the region -d < y < +d the electric field is zero.Now place a positively charged particle at y = 0. In this instance is the particle pushed or pulled? Now take away the sheet of positive charge. There is still a uniform electric field in the region -d < y < +d. The only difference being the magnitude of the particle. Is the positive particle at y = 0 being pushed or pulled? Now put the sheet of positive charge back at y = +d and take away the sheet of negative charge. There is still a uniform electric field in the region -d < y < +d. Again, the only difference being the magnitude of the particle. Is the positive particle at y = 0 being pushed or pulled?
Quote from: gazza711 on 25/06/2015 14:55:48surely 7lbs/sq inch of downforce with an atmisphere that is 100k feet high that has mass must contribute to something.But it can also be a 7 lbs per square inch of an up force (or a sideways force). Suction cups (https://en.wikipedia.org/wiki/Suction_cup) can stick to an appropriate surface in any direction as long as there is pressure on them from the outside.
(actually, if you can spin it really, really fast, it would get slightly heavier--but that's beside the point).
English is not my mother tongue, so I could be wrong in relation to most precise definition of PULL. But the way I put it in #20 regarding gravity attraction is very widely used in scientific literature:https://www.google.es/?gfe_rd=cr&ei=pJmGVfP0JMyA8Qf0rICICg&gws_rd=ssl#q=sun´s+pullPD: Sorry I said Archimedes in Spanish, with "qu" instead of "ch" ...
spinning a disk does not make it lighter (actually, if you can spin it really, really fast, it would get slightly heavier--but that's beside the point).spinning a disk can make it easier to lift, but that has to do with torque, not gravity. (//www.youtube.com/watch?v=GeyDf4ooPdo
Well the effect is wherever you influence the direction.the point is weightlessness in a sense.the weight changes.
Quote from: gazza711 on 26/06/2015 11:01:43Well the effect is wherever you influence the direction.the point is weightlessness in a sense.the weight changes.No, this experiment has nothing to do with weightlessness. It is not so difficult to lift the 19 kg flywheel if you are holding on to the wheel itself. Putting the wheel at the end of a stick and trying to lift from the other end introduces a lot of torque, and that is why it is difficult to lift. Again, lifting from the end of the stick close to the flywheel is not so hard, but lifting from the far end is hard. This torque is eased when the flywheel is spinning, but the mass and weight remain (effectively) constant.