Final answer:
Tolerances are specified through a range of acceptable values, meaning there is a permissible limit of variation for a given measurement or property. The accuracy of these tolerances is essential in engineering contexts to ensure reliability and proper function. As measurement accuracy decreases, the potential error and deviation from the accepted value can increase.
Step-by-step explanation:
Tolerances are specified through a range of acceptable values. This means the correct answer is 1) Through a range of acceptable values. When engineering parts or products, specifying tolerances is crucial for ensuring components fit together correctly and function as intended. A tolerance dictates the permissible limit or limits of variation in:
- A physical dimension;
- Material composition;
- Other measurable properties.
The accepted value is the correct value or standard that has been established, while the experimental value is the value measured during the experiment. The difference between these values represents the error of the measurement. As the accuracy of the measurement decreases, the potential error increases, which can result in a larger deviation from the accepted value.
(a) The number of seconds in an hour can be determined exactly, as it is based on defined units of time. (b) The number of pages in a book can be counted precisely. (c) The number of grams in your weight must be measured and comes with some degree of uncertainty, as scales have limits to their precision. (d) The number of grams in 3 kilograms can be determined exactly since it is a direct conversion (3000 grams).