RE: Some people believe that gravity doesn't exist
October 19, 2017 at 8:07 am
(This post was last modified: October 19, 2017 at 8:11 am by The Grand Nudger.)
(October 19, 2017 at 7:59 am)Anomalocaris Wrote: There is really zero fundamental difference between the two description. They are identical in all effects. But we are taught to think in terms of one description because that is perceived to be easier to grasp by text book writers.
That's hardly the reason, lol. The reason we use the non-novel description is because the sub has not, in fact, changed it's shape.
Quote: But that does not make it truer, or at a fundamental level even any different from the other description.It's fundamentally truer to the fact that the sub hasn't changed it's shape, simply increased it's mass and therefore overcome the hulls displacement. No different than throwing bricks in a boat till it goes under. Some of the first attempts at subs did use external, detachable ballast. Those subs could more accurately be described as changing their shape..though they didn't do it to submerge..but to surface.
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