
Concept explainers
Explain why measurement standards based on laboratory procedures are preferable to those based on specific objects such as the international prototype kilogram.

To explain: the reason for giving preference to laboratory procedures than based on specific object.
Explanation of Solution
Refer the three fundamental quantities are namely length, measured in meter in Earth’s size, mass in kilogram in amount of water, and the time in second by the length of the day.
The laboratory experiments give the operational definitions on the measurement standards. The operational definitions will give the same results anywhere in the earth with exact values. In the basic quantities, the length and time comes under the operational definitions.
The operational definition by laboratory procedures gives the exact value to a particular constant and meter was the first such quantity.
In order to get the long-term stability and the invariant physical constant is the correct solution. This can be achieved by laboratory experiments.
Therefore, the laboratory procedures are preferred instead of specific objects.
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Chapter 1 Solutions
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