oldhw 03 - alexander(jra2623 oldhomework 03 Turner(92510...

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alexander (jra2623) – oldhomework 03 – Turner – (92510) 1 This print-out should have 7 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. 001 10.0 points The volume of an object is given as a function of time by V = A + B t + C t 4 . Find the dimension of the constant C . 1. L / T 2. L 2 / T 4 3. L 4 / T 3 4. L 3 / T 4 correct 5. L / T 4 Explanation: [ C t 4 ] = [ V ] [ C ] T 4 = L 3 [ C ] = L 3 T 4 . 002 (part 1 of 2) 10.0 points While John is traveling along a straight inter- state highway, he notices that the mile marker reads 242 km. John travels until he reaches the 136 km marker and then retraces his path to the 170 km marker. What is John’s resultant displacement from the 242 km marker? Correct answer: - 72 km. Explanation: Let : s 0 = 242 km and s f = 170 km . Δ s = s f - s 0 = 170 km - 242 km = - 72 km . 003 (part 2 of 2) 10.0 points How far has he traveled? Correct answer: 140 km. Explanation: Let : s 2 = 136 km . The distance traveled is given by d = | s 2 - s 0 | + | s f - s 2 | = | 136 km - 242 km | + | 170 km - 136 km | = 140 km .
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