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Oct
24
comment understanding why inversion cannot be accomplished by a rigid change
yo ron thx for the tip! as a further point I see also you cannot turn a left-handed glove into a right handed glove by a translation and a rotation.
Oct
24
accepted understanding why inversion cannot be accomplished by a rigid change
Oct
24
comment understanding why inversion cannot be accomplished by a rigid change
first we know the improper rotation changes the handedness of the coordinate system. now, imagine a rigid body rotating about the origin. say there are initially some right handed set of coordinates fixed in the rigid body frame at t=0, and then we start rotating the rigid body about the origin of this coordinate system. There is simply not way you can rotate such that the handedness will change!! the rotation of a rigid body is completely defined by the euler angles and if you imagine any of these 3 rotations, there is no way to actually invert invert the axis by such a rotation.
Oct
24
comment understanding why inversion cannot be accomplished by a rigid change
an inversion is like a plane-reflection of a rigid body... without a rotation ( thus the handedness get's changed right?)
Oct
24
comment understanding why inversion cannot be accomplished by a rigid change
that has to do with certain molecules doing wierd quantum things ( NH3 does this supposedly) but I don't want to get into all that. supposedly NH3 can tunnel into it's left-handed state or something (i don't understand it classically so I'm not too sure)
Oct
24
awarded  Student
Oct
24
revised understanding why inversion cannot be accomplished by a rigid change
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Oct
24
comment understanding why inversion cannot be accomplished by a rigid change
if you look at the vector r = (1,0,0) maybe there is a way to explaon this with a simple example like that, i'm workin' on it right now...
Oct
24
asked understanding why inversion cannot be accomplished by a rigid change
Oct
17
awarded  Teacher
Oct
17
revised Convert acceleration as a function of position to acceleration as a function of time?
added 109 characters in body
Oct
17
awarded  Editor
Oct
17
revised Convert acceleration as a function of position to acceleration as a function of time?
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Oct
17
answered Convert acceleration as a function of position to acceleration as a function of time?