2) Why can a pace or a footstep not to be used as a standard unit of length
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Mercury thermometers give accurate readings.Quick reaction to changes of temperatures because metal is a good heat conductor.Mercury has a very low saturation vapor pressure.Possible to measure higher temperatures as in cooking.Same expansion coefficient at all temperatures
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Answer:
Pace or a footstep cannot be used as a standard unit of length because it varies from person to person. 4.
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