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I'll not do the footwork again. There was an exact study presented here several months ago that was conducted by the physics department at Arizona State University. In the study they used several different modems whereby a baseball could be projected with exact measured speed and spin ratios. They concluded that for Bernoulli's principle to apply the rotation of the ball would have to exceed 3600 rpm. Then through more extensive research they concluded that the highest possible rotation placed on a baseball by a human while throwing it would reach only 1800 rpm. Adair was correct that Einstein couldn't predict all the pertinent forces that would need to be applied to prove exact movement. However, Einstein not only did no such study that I'm aware of, if he did he would not have had the advanced mesurement technology available to him that the physicists did who conducted the ASU study.
Tim.
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