p38_060 - 60. (a) vr = 2v = 2(27000 km/h) = 54000 km/h. (b)...

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60. (a) v r = 2 v = 2(27000 km / h) = 54000 km / h . (b) We can express c in these units by multiplying by 3 . 6: c =1 . 08 × 10 9 km/h. The correct formula for v r is v r =2 v/ (1 + v 2 /c 2 ), so the fractional error is 1 1 1+ v 2 /c 2 =1 1 1 + [(27000 km / h) / (1 . 08 × 10 9 km / h)]
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