User:WalkingRadiance/Physics with Applications/Introduction, Measurement Estimating/Questions


 * 1) What are merits and drawbacks of using a person foot as a standard? Consider both
 * 2) a particular person's foot
 * 3) any person's foot

Keep in mind that it is advantegous that fundamental standards be accessible (easy to compare to), invariable (do not change), indestrucbiel, and reproducible.

A foot is not easily accessible. A foot is good for measuring walking distances and the lgenths of shoes and other objects about the size of the foot but is not good for measuring the sizes of mountains and hills and forests and trees or small objects such as paper viruses, and electrons.

A foot is therefore not accessible.

A foot length is not invariable because of growth in the foot possible from physical defects such as carcinogens. a foot might be shorter with shoes on or off and shorter when nails clicked it off center of mass

indesctrubile

the human body is not indestructible

Reproducible

the foot exists in the long and short version and its not intimating a weaker.