PHYSICS 7C Midterm: physics7C-fa2012-mt2-Tagliaferro-soln
Document Summary
T 2 m (cid:2)2n2 oil n2 air = 388 m. 3 problem 1 (i) a hot cup of co ee does decrease in mass as it cools down. It loses energy through radiating that heat away. (i) event a happened before event b in a certain frame, and that the two events are spacelike separated. This means there exists a certain frame where b happens before. Because they are spacelike separated, we can boost to a frame where a and b occur at the same time. The x" axis of that frame will connect the dots a and b. Boosting a little more will cause b to happen before a. A happening at the same position as b in some frame would say the invariant interval would be s2 = c2 t2 02 0 which is time-like. We can"t get from space-like to time-like with changing reference frame.
