An Introduction to Physical Science 15th Edition James Shipman, Jerry D. Wilson,
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Charles A. Higgins, Bo Lou
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Chapter 1-24 nn
Chapter 1 nn
MEASUREMENT
Chapter 1 is important because all quantitative knowledge about our physical environment
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nn is based on measurement. Some chapter sections have been reorganized and rewritten for
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nn clarity. The 1.2 Section, ―Scientific Investigation,‖ introduces the student to the procedures for
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scientific investigation. Major terms such as experiment, law, hypothesis, theory and
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nn scientific method are introduced. The idea that physical science deals with quantitative
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nn knowledge should be stressed. It is not enough to know that a car is going ―fast‖; it is
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nn necessary to know how fast. nn nn nn nn
A good understanding of units is of the utmost importance, particularly with the
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nn metric- British use in the United States today. The metric SI is introduced and explained. Both
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nn the metric and the British systems are used in the book in the early chapters for familiarity.
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nn The instructor may decide to do examples primarily in the metric system, but the student
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nn should get some practice in converting between the systems. This provides knowledge of the
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nn comparative size of similar units in the different systems and makes the student feel
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nn comfortable using what may be unfamiliar metric units. The Highlight, ―Is Unit Conversion
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Important? It Sure Is,‖ illustrates the importance of unit conversion.
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The general theme of the chapter and the textbook is the students’ position in his or
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nn her physical world. Show the students that they know about their environment and
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nn themselves through measurements. Measurements are involved in the answers to such
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nn questions as, How old are you? How much do you weigh? How tall are you? What is the
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nn normal body temperature?
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How much money do you have? These and many other technical questions are resolved or
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nn answered by measurements and quantitative analyses.
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DEMONSTRATIONS
Have a meter stick, a yardstick, a timer, one or more kilogram masses, a one-liter beaker or a
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nn liter soda container, a one-quart container, and a balance or scales available on the
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nn instructor’s desk. Demonstrate the comparative units. The meter stick can be compared to the
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nn yardstick to show the difference between them, along with the subunits of inches and
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nn centimeters. The liter and quart also can be compared. Pass the kilogram mass around the
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nn classroom so that students can get somenn nn nn nn nn nn
,idea of the amount of mass in one kilogram. Mass and weight may be compared on the balance
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nn and scales.nn
When discussing Section 1.6, ―Derived Units and Conversion Factors,‖ have class
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nn members guess the length of the instructor’s desk in metric and British units. Then have
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nn several students independently measure the length with the meter stick and yardstick.
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nn Compare the measurements in terms of significant figures and units. Compare the averages of
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nn the measurements and estimates. Convert the average metric measurement to British units, and
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vice versa, to practice conversion factors and to see how the measurements compare.
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Various metric unit demonstrations are available from commercial sources.
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ANSWERS TO MATCHING QUESTIONS nn nn nn
a. 15 nn n n n n b. 8 nn n n n n c. 10 nn n n n n d. 2 nn n n n n e. 19 nn n n f. 14 g. 21 h. 13 i. 18
n n nn nn nn nn j. 6 nn n n n n k. 11 l. 3nn nn m. 12 nn
n. 1 o. 9 nn nn
p. 4 nn n n n n q. 23 r. 17 s. 5 t. 20
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ANSWERS TO MULTIPLE-CHOICE QUESTIONS nn nn nn
1.c 2. b 3. c 4. b 5. b 6. c 7. d 8. b
nn nn nn nn nn nn nn n n n n 9. d 10. c 11. b 12. b
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ANSWERS TO FILL-IN-THE-BLANK QUESTIONS nn nn nn
1. biological 2. hypothesis
nn nn 3. scientific method 4. sight, hearing 5. limitations
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7. longer 8. fundamental 9. time or second 10. one-billion, 10
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12. mass nn 13. less nn
ANSWERS TO SHORT-ANSWER QUESTIONS nn nn nn
1. An organized body of knowledge about the natural universe by which knowledge is
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nn acquired and tested. nn nn
2. Physics, chemistry, astronomy, meteorology, and geology.
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3. The 5 elements of scientific method are:
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1. Observations and Measurements, nn nn
2. Hypothesis,
3. Experiments,
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5. Law.
4. Hypothesis
,5. A law is a concise statement about a fundamental relationship of nature. A theory is a
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nn well- tested explanation of a broad segment of natural phenomena.
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6. It illustrates the need to improve the standard of education among the general public and
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to emphasize the importance of a well-developed scientific method.
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7. Sight, hearing, touch, taste, and smell.
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8. They have limitations and can be deceived, thus providing false information about
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nn our environment.
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9. (a) No. nn n n (b) Yes. nn n n (c) Lower line. nn nn
10. A fixed and reproducible value.
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11. They are the most basic quantities of which we can think. And they are not dependent
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nn on other physical quantities.
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12. A group of standard units and their combinations.
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13. mile/hour
14. No, the United States is the only major country that has not gone completely metric.
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15. Kilogram, a platinum-iridium cylinder. nn nn nn
16. Mass. Weight varies with gravity. nn nn nn nn
17. Meter-kilogram-second, International System of Units, and centimeter-gram-second. nn nn nn nn nn nn
18. Base 10 easier to use (factors of 10).
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19. kilo- (k), mega- (M), milli- (m), micro- (µ)
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20. Mass of a cubic liter of water.
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21. kg/cubic meter. nn
22. Three fundamental quantities generally used are: Length(m), Mass(Kg), and
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nn Time(s).
23. The compactness of matter.
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24. It is given a new name.
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25. No. An equation must be equal in magnitude and units.
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26. Yes. And it could be confused with ―meters‖ instead of ―miles.‖
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27. To express measured numbers properly.
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28. The 3 rules for determining significant figures are:
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1. Non-zero digits are always significant, nn nn nn nn
, 2. Zeros at the beginning of a number are not significant,
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3. Internal or end zeros are significant. nn nn nn nn nn
For example - 0203.089 have 6 significant figures (2,0,3,0,8,9).
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29. Three.
30. One.
ANSWERS TO VISUAL CONNECTION nn nn nn
a. meter, b. kilogram, c. second, d. mks, e. foot, f. pound, g. second, h. fps
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ANSWERS TO APPLYING-YOUR-KNOWLEDGE QUESTIONS nn nn nn
1. Intrinsic properties are invariant. Kilogram cylinder and meterstick are subject to wear,
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dirt, and change.
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2. A liter, because it is larger than a quart.
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3. Scientific laws describe; legal laws regulate. Scientific laws are about the nature of
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things; legal laws concern society.
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4. 1 kgf > 1 lbf (force; 1 kgf = 2.2 lbf or 1 kgm = 2.2 lbm); 1 m3 > 1 gal; notable
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exception is the slug.
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5. No, a man did not buy a new rod because the box has dimensions 3 ft × 4 ft so he put his
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5 ft rod diagonally.
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6. 1 m = 3.28 ft
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828 m (3.28 ft/m) = 2.72 ×103 ft; 508 m (3.28 ft/m) = 1.67 × 103 ft
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Δ = 1.05 × 10 ft
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3
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ANSWERS TO EXERCISES nn nn
1. 100,000 cm or 105 cm nn nn nn nn
2. 16000 MB nn
3. 10 mm3 6
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4. 1 m3 = 103 L. 1 m3 = 102 cm x 102 cm x 102 cm = 106 cm3 (1 L/103 cm3) = 103 L = 1000 L
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5. 0.50 L (1 kg/L) = 0.50 kg = 500 g
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6. 15 cm x 25 cm x 30 cm = 11250 g and 11.25 kg
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7. (a) 0.55 Ms = 0.55 × 10 s
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6
nn n n n n (b) 2.8 km = 2.8 103 m (c) 12 mg = 12 10–3 g = 1.2 10–5
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kgnn
(d) 100 cm = 1.00 m
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