
Concept explainers
What are the merits and drawbacks of using a person's foot as a standard? Consider both(a) a particular person's foot, and (b) any person's foot keep in mind that it is advantageous that fundamental standards be accessible (easy to compare to), invariable (do not change), indestructible, and reproducible.

Part (a) To Determine:
Merits and drawbacks of using a person’s foot as a standard. Consider a particular person’s foot.
Answer to Problem 1Q
Solution:
Merits | Drawbacks |
---|---|
(1). Reproducible, it can easily reproducible By tracing or plaster casts. | (1). Not accessible: A particular person’s foot would not be very accessible. |
(2). It is variable. | |
(3). Destructible |
Explanation of Solution
The fundamental unit should be accessible, invariable, indestructible, and reproducible. A particular person‗s foot would not be very accessible because a person could not be at more than one place at a time. This standard should be some be somewhatinvariable if the person were an adult, but due to health change it may be variable (swelling or injury), the length of the standard foot may change. The standard foot is destructible, the foot does not last forever, but it is easily reproducible.

Part (b) To Determine:
Merits and drawbacks of using a person’s foot as a standard. Consider any person’s foot.
Answer to Problem 1Q
Solution:
Merits | Drawbacks |
---|---|
(1)Very accessible | (1)Extremely variable |
(2)Indestructible | (2)Not reproducible |
Explanation of Solution
If any person’s foot were to be used as standard would vary significantly depending on the person. This is very accessible because when a measurement was needed, it would be very easy to find someone with feet. This is extremely variable. This produce so many standards.
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