PHY
Chapter 1-w-key

# Chapter 1-w-key - Chapter 1 Multiple Choice Homework...

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1 Chapter 1 – Multiple Choice Homework Question 1: To convert km/hr into m/s, 1) multiply by 1000 and multiply by 3600 2) divide by 1000 and multiply by 3600 3) multiply by 1000 and divide by 3600 4) divide by 1000 and divide by 3600 Correct Answer: 3) Question 3: Which of the following numbers is given to four significant figures? 1) 0.00020 2) 0.0020 3) 2.000 4) 2000 Correct Answer: 3) Question 5: A quartz crystal controlled watch is accurate to within 0.01%. If it was initially synchronized with the National Bureau of Standards clock, by how many seconds could it be in error in one week? 1) 6 2) 60 3) 600 4) 3600 Correct Answer: 2) Question 8: An electric motor rotates at 1750 revolutions per minute. Express this rotation in radians per second. 1) 240 rad/sec 2) 95 rad/sec 3) 183 rad/sec 4) 130 rad/sec Correct Answer: 3) Question 9: A record player rotates at 45 rpm (revolutions per minute). Through how many degrees does it rotate in 1 second?

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Unformatted text preview: 1) 200° 2) 150° 3) 270° 4) 300° Correct Answer: 3) 2 20. The drag force of an object moving in air is given by the formula, F = bV 2 , where F is the Force in newtons and V is the velocity in meters/sec. If the velocity is doubled, then the force is increased by a factor of: A. 1 B. 2 C. 3 D. 4 E. 5 Correct Answer: D 30. The length 3.76 mm is divided by 6 mm. The appropriately rounded ratio is: A. 0.627 B. 0.63 C. 0.6 D. 0.62666 E. 0.6267 Correct Answer: C 43. A sheet of paper is 27.95 cm long by 8.5 in wide, by 0.10 mm thick. What is the volume of the sheet of paper in m 3 ? A. 9.4 × 10-6 m 3 B. 6.0 × 10-8 m 3 C. 6.0 × 10-6 m 3 D. 6.0 × 10-2 m 3 Correct Answer: B 46. To be dimensionally consistent, distance [L], velocity [L/T], and time [T] must be related as follows: A. Distance = time/velocity B. Distance = velocity/time C. Distance = time/velocity 2 D. Distance = velocity × time 2 E. Distance = velocity × time Correct Answer: E...
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