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10 Question-Answer on theory of relativity 1.        An inertial frame of reference is one (a)     Which remains at absolute rest (b)    Which remains in absolute   motion (c)     Which does not accelerate (d)    Which may be attached to an observer Ans: (c) 2.        Which of the following is not assumed to be absolute in Newtonian mechanics? (a)     Mass (b)    Time (c)     Space (d)    State of rest or motion. Ans: (d) 3.        An event can be described by an observer in a cartesian frame of reference moving along X-axis with number of coordinates as (a)     2 (b)    3 (c)     4 (d)    6 Ans: (c) 4.        In which of the following frame of reference, the acceleration of the pa...