Solution Manual For College Physics With Masteringphysics, 7th Edition

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Solution Manual For College Physics With Masteringphysics, 7th Edition gives you the answers you need, explained in a simple and clear way.

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CHAPTER 1
MEASUREMENT AND PROBLEM SOLVING
Remind students that their answers to odd-numbered exercises may be slightly different from those given here
because of rounding. Refer to Problem-Solving Hint: The "Correct" Answer in Chapter 1.
Multiple Choice:
1. (c).
2. (b).
3. (c).
4. (b). The gram is the mass of one cm3 of water, so the kilogram (1000 g) and tonne (1000 kg) are all related to a
volume of water. Only the pound is not related to a volume of water.
5. (b).
6. (b).
7. (a).
8. (d). A quart is slightly less than a liter, 2000 μL is 2 mL, and 2000 mL is 2 L, so 2000 mL has the greatest volume.
9. (c). Micro- is 10-6, centi- is 10-2, nano- is 10-9, and milli- is 10-3, so nano- is the smallest.
10. (d).
11. (d).
12. (c).
13. (a). The kg is a unit of mass and the lb is a unit of force. At the surface of the Earth, 1 kg is equivalent to 2.2 lb,
which means that a 1-kg object weighs 2.2 lb.
14. (c). Because the μL is the smallest volume of those listed, you will need more of them to make up any given volume,
and hence a larger number of μL.

2 College Physics Seventh Edition: Instructor Solutions Manual
15. (a).
16. (c).
17. (b).
18. (a).
19. (c).
20. (d).
Conceptual Questions:
1. Because there are no more fundamental units. The units of all quantities can be expressed in terms of the
fundamental, or base, units.
2. Weight depends on the force of gravity, which can vary with location.
3. The mean solar day replaced the original definition. No, because this has been replaced by atomic clocks.
4. One major difference is the decimal versus duodecimal basis. Another difference is that SI basic units are meters,
kilograms and seconds, whereas the British system uses feet, pounds and seconds.
5. No, because 3 cm is over an inch. Ladybugs are on the order of several mm long. Yes, a 10-kg salmon would weigh
on the order of 22 pounds, which is typical for a medium sized fish like that.
6. This is by definition3
1 L 1000 mL and 1 L 1000 cm .= =
7. The metric ton is actually a misnomer since it is not a weight unit but a mass unit, defined as the mass of 1 cubic
meter of water. But3
l m 1000 L= and 1 L of water has a mass of 1 kg. So one metric ton is equal to 1000 kg.
8. No, it only tells if the equation is dimensionally correct. You could be missing (or have extra) dimensionless
numbers such as ½ or π.
9. No, unit analysis can only tell if it is dimensionally correct. Dimensionless factors such as π may be missing.
10. By putting in units and solving for those of the unknown quantity.

Chapter 1 Measurement and Problem Solving 3
11. π is dimensionless and therefore also unitless because it is defined as the ratio of two lengths, the circumference to
the diameter of a circle.
12. No, they are not the same. An equivalent statement is not dimensionally correct.
13. Yes, whether you multiply or divide should be consistent with unit analysis for the final answer.
14. Give him 2.54 cm and he’ll take 1.61 km, since 2.54 cm = 1.00 in. and 1.61 km = 1.00 mi.
15. To provide an estimate of the accuracy of a quantity.
16. No, there is always one doubtful digit, the last digit.
17. For (a) and (b), the result should have the least number of significant figures. For (c) and (d), the result should have
the least number of decimal places.
18. Because 5 is midway between the upper and lower extremes of 9 and 1.
19. See the six steps as listed in Chapter 1.
20. No, since an order of magnitude calculation is only an estimate.
21. The accuracy of the answer is expected to be within a factor of 10 of the correct answer.
22. Approximate the area of skin-covered body parts using familiar geometric shapes. For example, use a sphere for the
head and cylinders for the arms, legs, and torso.
23. Since a liter is close to a quart and there are four quarts in a gallon, this volume is about 75 gallons which is not
reasonable for a car (but might be for a large truck or other large vehicle such as an RV).
24. No, since 30 km/h ≈ 19 mi/h < 25 mi/h.

4 College Physics Seventh Edition: Instructor Solutions Manual
Exercises:
1. The decimal system (base 10) has a dime worth 10¢ and a dollar worth 10 dimes, or 100¢. By analogy, a
duodecimal system would have a dime worth 12¢ and a dollar worth 12 “dimes,” or $1.44 in decimal dollars. Then
a penny would be 1
144 of a dollar.
2. (a) Different ounces are used for volume and weight measurements. 16 oz = 1 pt is a volume measure and 16 oz = 1
lb is a weight measure.
(b) Two different pound units are used. Avoirdupois lb = 16 oz‚ troy lb = 12 oz.
3. (a) 
  
 
6
1 MB
40,000,000 bytes 10 bytes =40 MB
(b) 
  
 
1 L
0.5722 mL 1000 mL = -4
5.722 10 L
(c) 
  
 
100 cm
2.684 m 1 m =268.4 cm
(d)  
 
 
1 kilobuck
5, 500 bucks 1000 bucks =5.5 kilobucks
4. That is because 1 nautical mile = 6076 ft = 1.15 mi. A nautical mile is larger than a (statute) mile.
5.  
 
 
1 g water
(25 cm)(35 cm)(55 cm) 3
1 cm water = 48,100 g =48 kg
6. Let x be the length of each side of the cube.=      
  
3
3.788 L 1000 cm3 (1 qt) 4 qt 1 L
x
= 947 cm3( )= =
1/3
947 cm 9.82 cmx
7. (a) (20 cm)3 (1 L/1000 cm3) =8.0 L
(b)( )= = =
 
 
 
3
1 m3
1000 kg/m (8.0 L) 8.0 kg
1000 L
m V


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