Chapter 01 - Chapter 1: MEASUREMENT 1. The SI standard of...

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1. The SI standard of time is based on: A. the daily rotation of the earth B. the frequency of light emitted by Kr 86 C. the yearly revolution of the earth about the sun D. a precision pendulum clock E. none of these Ans: E 2. A nanosecond is: A. 10 9 s B. 10 9 s C. 10 10 s D. 10 10 s E. 10 12 Ans: B 3. The SI standard of length is based on: A. the distance from the north pole to the equator along a meridian passing through Paris B. wavelength of light emitted by Hg 198 C. wavelength of light emitted by Kr 86 D. a precision meter stick in Paris E. the speed of light Ans: E 4. In 1866, the U. S. Congress de f ned the U. S. yard as exactly 3600 / 3937 international meter. This was done primarily because: A. length can be measured more accurately in meters than in yards B. the meter is more stable than the yard C. this de f nition relates the common U. S. length units to a more widely used system D. there are more wavelengths in a yard than in a meter E. the members of this Congress were exceptionally intelligent Ans: C 5. Which of the following is closest to a yard in length?
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Chapter 01 - Chapter 1: MEASUREMENT 1. The SI standard of...

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