hmwk-1-K09 - PHY 317K HOMEWORK # 1 DUE on September 8, 2009...

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PHY 317K HOMEWORK # 1 DUE on September 8, 2009 by 8:00pm Instructions: Use a UT ANSWER SHEET to mark answers. Provide your NAME (last, first), UTEID , and UNIQUE NUMBER of the course. Sign and date it. The answer sheets must be placed in the 317K box located outside PAI 2.48. Late homework will not be graded . Answer the following 52 questions: 1. Your car gets 30.2 mi/gal on a trip. How many kilometers/liter did it get? A) 7.97 km/L B) 12.8 km/L C) 18.0 km/L D) 28.2 km/L E) 48.6 km/L 2. A nanosecond is: A) 10 9 s B) 10 –9 s C) 10 –10 s D) 10 –11 s E) 10 –12 s 3. The SI base unit for mass is the: A) gram B) pound C) kilogram D) ounce E) kilopound 4. (5.0 × 10 4 ) × (3.0 × 10 6 ) = A) 1.5 × 10 9 B) 1.5 × 10 10 C) 1.5 × 10 11 D) 1.5 × 10 12 E) 1.5 × 10 13 Page 1
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5. The number of significant figures in 0.000330 is: A) 2 B) 3 C) 4 D) 5 E) 6 6. The number of significant figures in 650.0 is: A) 1 B) 2 C) 3 D) 4 E) 5 7. 7.513 + 27.3 = A) 35 B) 34.8 C) 34.9 D) 34.81 E) 34.813 8. One mile is equivalent to 1609 m, so 65 mph (miles per hour) is: A) 210 m/s B) 21 m/s C) 71 m/s D) 8.2 m/s E) 29 m/s 9. A sphere with a radius of 2.4 cm has a surface area of: A) 9.6 × 10 –3 m 2 B) 7.2 × 10 –3 m 2 C) 3.6 × 10 –3 m 2 D) 1.2 × 10 –2 m 2 E) 0.14 m 2 Page 2
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10. One meter is equivalent to 3.281 ft. A cube with edges of 0.75 ft has volume: A) 1.2 × 10 -2 m 3 B) 2.6 × 10 –2 m 3 C) 0.51 m 3 D) 9.5 × 10 –2 m 3 E) 0.18 m 3 11. During a short interval of time the speed v in m/s of an automobile is given by v = at + bt 3 + c/t , where the time t is in seconds. The units of a, b and c are, respectively: A) m s 3 ; m s 4 ; s/m B) m/s 2 ; s 4 /m; s/m 2 C) m/s 2 ; m/s 4 ; m D) m/s 3 ; m/s 4 ; m/s E) m/s 4 ; m/s 3 ; m 12. Suppose A = BC , where A has the dimensions L 2 /M 3 and C has the dimensions L/T. Here M represents mass, L represents length, and T represents time. Then B has the dimension: A) T/M B) L 2 /TM C) TM/L 2 D) LT/M 3 E) M/L 2 T 13. Suppose A = B m C n , where A has dimensions L 2 T, B has dimensions LT –1 , and C has dimensions L 2 T 2 . Here M represents mass, L represents length, and T represents time. Then the exponents m and n, respectively (i.e., m first, n second), have the values: A) 2/3; 1/3 B) 2; –1 C) 1/2; –2/3 D) 1/5; 3/5 E) 1/2; 3/4 14. A particle moves along the x axis from x i to x f . Of the following values of the initial and final coordiantes, which results in a negative displacement? A) x i = 4m, x f = –1m B) x i = 4m, x f = 8m C) x i = –4m, x f = 2m D) x i = –4m, x f = –3m E) x i = 2m, x f = 4m Page 3
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15. Two automobiles are 250 kilometers apart and traveling toward each other. One automobile is moving at 60 km/h and the other is moving at 40 km/h. In how many hours will they meet?
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hmwk-1-K09 - PHY 317K HOMEWORK # 1 DUE on September 8, 2009...

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