Hw09 - Version PREVIEW Hw09 Ross(10219 This print-out...

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Version PREVIEW – Hw09 – Ross – (10219) 1 This print-out should have 14 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. Serway CP 26 04 001 10.0 points How fast must a meter stick be moving if its length is observed to shrink to 0 . 56 m? Correct answer: 0 . 828493 c. AP B 1994 FR 3b 002 (part 1 of 3) 10.0 points A spaceship travels with a speed of 0 . 6 c as it passes by the Earth on its way to a distant star, as shown in the diagram below. The pilot of the spaceship measures the length of the moving ship as 40 m. 0 . 6 c Earth Determine its length as measured by a per- son on Earth. Correct answer: 32 m. 003 (part 2 of 3) 10.0 points The pilot of the spaceship observes that the spaceship travels for 7 years. Determine how much time has passed ac- cording to a person on Earth. Correct answer: 8 . 75 years. 004 (part 3 of 3) 10.0 points Some time after passing the Earth, the pilot shoots a laser pulse backward at a speed of 3 × 10 8 m / s with respect to the spaceship.
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