1. Since 1983 the standard meter has been defined in terms of which of the following? a. specific alloy bar housed at Sevres, France b. wavelength of light emitted by krypton-86 c. distance from the Earth's equator to the North Pole d. the distance light travels in a certain fraction of a second e. None of the above ANSWER:   d POINTS:   1 DIFFICULTY:   1 QUESTION TYPE:   Multiple Choice HAS VARIABLES:   False TOPICS:   1.1 Standards of Measurement DATE CREATED:   10/30/2023 2:07 AM DATE MODIFIED:  10/30/2023 2:08 AM 2. Since 1967 the standard definition for the second has been based on which of the following? a. characteristic frequency of the cesium-133 atom b. average solar day c. sidereal day d. Greenwich Civil Time e. None of the above ANSWER:   a POINTS:   1 DIFFICULTY:   1 QUESTION TYPE:   Multiple Choice HAS VARIABLES:   False TOPICS:   1.1 Standards of Measurement DATE CREATED:   10/30/2023 2:08 AM DATE MODIFIED:  10/30/2023 2:09 AM


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