41. Only time and the coordinates parallel to the direction of relative motion change, while those coordinates perpendicular do not. 42. These vector quantities point in the direction of the relative motion of the lens with respect to the source. 43. The difference in the relative motions of the two plates is manifest in the left lateral motion along the fault. 44. He could not determine any relative motion , so he interpreted the result as a confirmation of the thesis of Stokes. 45. The crucial relative motion is that of the disk and the return path, not of the disk and the magnet. 46. The Reynolds number can be defined for several different situations where a fluid is in relative motion to a surface. 47. Subtraction of a preceding absolute position from the present absolute position yields the relative motion of the finger during that time. 48. One source of difficulty is that cold welding does not exclude relative motion between the surfaces that are to be joined. 49. The relative motion of the beam and the workpiece is most often achieved by rotation or linear travel of the workpiece. 50. "That's relative motion .
