Physics: Principles with Applications
Physics: Principles with Applications
6th Edition
ISBN: 9780130606204
Author: Douglas C. Giancoli
Publisher: Prentice Hall
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Chapter 1, Problem 1Q

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.

Expert Solution
Check Mark
To determine

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.

Expert Solution
Check Mark
To determine

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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Physics: Principles with Applications

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