*Þ>­>šHHÛ@ÿçÿîÿR#(ü,, ç `,- ^ì&'dAxxxx€Là h`ÿ  Chapter 13` ÿStudy and Reading Guide` ÿ 51. Measurements are really ________________ numbers.  ?2. The numbers you get from counting are ____________ numbers. G3. The difference between two measurements is called a ____________ in the measurements.  J4. List three different factors that may cause variations in measurement.  5. Define Precision:   6. Define Accuracy:  M7. The text illustrates precision vs. accuracy in figure 13-2. Give another 'illustration of precision vs. accuracy. I8. Even using precision instruments to measure objects, the results are Eapproximate. The answers may vary from one measurement to another. CThis variation or uncertainty in measurements is called "________". K9. There are four rulers pictured in figure 13-5 on page 10. What is the precision of each ruler.  Ruler A:  Ruler B:  Ruler C:  Ruler D:  ,10. Read the following micrometer settings.  ______A.     ______B.       I11. The greatest possible error of measurement is the greatest possible 9difference between the ____________ and the ____________. G12. To figure out the greatest possible error of measurement you would ?take one half of the _________________________________________. I13. What is the greatest possible error for measurements made with each (of the rulers in figure 13-5 on page 10.  Ruler A:  Ruler B:  Ruler C:  Ruler D:  14. Define Tolerance:     M15. Specifications on a blueprint state the length of an airplane part must be 13.85 inches ± .05 inch.  a. What is the upper limit?   b. What is the lower limit?  & c. What is the tolerance interval?  ( d. Is 13.91 inches within tolerance?  ( e. Is 13.81 inches within tolerance? E16. In figure 13-8 on page 18, which method would give you the more "accurate measure of the bolt head?   817. List 4 things that improve accuracy in measurement. a.  b.  c.  d.    I18. What significance does the underline on the digit five have for the `number 2.6 ÿ5 ÿ ?  `"19. I. 4.6 ÿ4 ÿ ` II. 101. ÿ2` ÿ III. .06 ÿ5` ÿ VI. 12.3 ÿ5` ÿ K a. What is the last significant digit of each of the above measurements?  I.  II.  III.  VI. D b. What is the number of significant digits in each of the above  measurements?  I.  II.  III.  VI. H20. List the steps for adding and subtracting measurements of different  precision.  1.   2.   3.   `<21. Add these measurements: 104.6 ÿ5 ÿ inches`P . ÿ6 ÿ inches`P 567.48 ÿ9 ÿ inches`P  ÿ7 ÿ. inches @Y22. A piece of metal tubing is 104. ÿ7 ÿ inches long. Three pieces are cut from @athis tubing. One piece is 13. ÿ6 ÿ inches. The second is 2 ÿ3 ÿ inches and the `Mthird is 4.8 ÿ6 ÿ inches. What is the length of the remaining piece?        K23. List the steps for multiplying and dividing measurements of different  precision.  1.   2.   3. @d24. The dimension of a garden is 40. ÿ5 ÿ feet by 20.2 ÿ5 ÿ feet. Find the area of 'the garden. ( Area = Length x Width )       <25. A calculator gives you more _________________ than your measurements justify.