Multiple Choice Quiz
Multiple Choice Quiz
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 1 To convert km/hr into m/s, A) multiply by 1000 and multiply by 3600 B) divide by 1000 and multiply by 3600 C) multiply by 1000 and divide by 3600 D) divide by 1000 and divide by 3600 2 What is the correct abbreviation of the word "kilometer"? A) k.m. B) k-m C) Km D) km 3 Which of the following numbers is given to four significant figures? A) 0.00020 B) 0.0020 C) 2.000 D) 2000 4 Kepler's Laws: A) apply only to the motion of the earth B) can be used to predict eclipses C) are fundamental laws of nature D) can be deduced from Newton's laws of motion and gravity 5 A quartz crystal controlled watch is said to have an accuracy of 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? A) 6 B) 60 C) 600 D) 3600 6 An observer sees an airplane flying directly overhead and determines that the distance from the wingtip to wingtip subtends and angle of 0.0080 radians. She knows that the wingspan of the airplane is actually 160 feet. What is its altitude? A) 10,000 ft B) 15,000 ft C) 20,000 ft D) 25,000 ft 7 A clock is set against an accurate standard and 30 days later is found to be in error by 12 seconds. What is the percentage of error in its time keeping? A) 0.0005% B) 0.002% C) 0.01% D) 0.5% 8 An electric motor rotates at 1750 revolutions per minute. Express this rotation in radians per second. A) 240 rad/sec B) 95 rad/sec C) 183 rad/sec D) 130 rad/sec 9 A record player rotates at 45 rpm (revolutions per minute). Through how many degrees does it rotate in 1 second? A) 200° B) 150° C) 270° D) 300° 10 A physics student standing on level ground finds that an imaginary line drawn from his eye to the top of a tree that is 180 feet away makes an angle of 17° above the horizontal. If his eyes are 5.8 feet above ground, what is the height of the tree? A) 23 ft B) 35 ft C) 47 ft D) 61 ft