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Old Sep 7th 2013, 12:53 AM   #1
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Unit vector is either a constant vector or not?

Are Unit vectors in the sperical and cylindrical cordinate system the constant vectors?
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Old Sep 7th 2013, 06:17 AM   #2
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I've not heard the term "constant vectors" before, but in polar and spherical coordinates the unit vectors in the radial and tangential direction(s) are not constant - they change orientation depending on the position of the object. In the cylindrical coordinate system the unit vector in the z-axis direction is constant.
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