The standard unit must be in variable does defining distance between the tip of the middle finger and the elbow as a unit of length is not in variable
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ANSWER:
The standard unit must be invariable. so that defining distance between the tip of the middle finger and the elbow as a unit of length is not invariable.
EXPLANATION:
Basically measurement forms the fundamental principle to many branches of science, and the construction and engineering services. Generally measurement is defined as the action on numerical with their possible physical quantities and phenomena. Measurements find a role in everyday activities . It is necessary to study and explore the elements along with their theoretical foundations . And also conditions as well as limitations. It is defines the units to be chosen for the measurement of various commodities.
Measurement defined the new standards as well as form transductions for the quantities which do not have any possible access for direct comparison.
Measurements may be made by unaided human senses. And It can be estimated by the use of instruments, which may range in complexity from simple rules for measuring lengths to highly complex analogous systems to handle and design the commodities beyond the capabilities of the senses.
Therefore, we can consider that a measurement, always involves a transfer of energy or interaction between the object and the observer or observing instrument.
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