Physics 011

Chapter 1

Answers of PQ #1

1.	A kilogram is The correct answer: 10^3 grams. This would be a megagram (not used). Review Table 1-4 in Giancoli.
2.	A centimeter is The correct answer: .01 meters. A centimeter is part of a meter. Review Table 1-4 in Giancoli.
3.	A megawatt is The correct answer: 10^6 watts.
4.	A nanosecond is The correct answer: 10^-9 seconds. This is a millisecond. Review Table 1-4 in Giancoli.
5.	A kilometer is The correct answer: less than a mile. A meter is about a yard and kilo means one thousand. Review Section 1-6 in Giancoli.
6.	All of the following are base units of the SI system except: The correct answer: pound This is one of the basic units in the SI system. Review Section 1-5 in Giancoli.
7.	The SI prefix for 10^-12 is The correct answer: pico- This is 10^9. Review Table 1-4 in Giancoli.
8.	Given (1 angstrom unit = 10^-10 m) and (1 fermi = 10^-15 m), what is the relationship between these units? The correct answer: 1 angstrom = 10^5 fermi The angstrom is larger than the fermi. Review Table 1-4 in Giancoli.
9.	Convert 0.75 kilometers to meters. The correct answer: 750 m This answer would be 75 kilometers. Review Section 1-6 in Giancoli.
10.	Convert 0.0215 m to mm. The correct answer: 21.5 mm To convert to millimeters multiply by 1000. Review Section 1-6 in Giancoli.
11.	Add 321.475, 42.500, and 2.25, and round properly. The correct answer: 366.23
12.	Multiply 12.75 times 4.375 and round properly. The correct answer: 55.78 The answer should have four significant figures. Review Section 1-4 in Giancoli.
13.	How many common house flies can fit one layer deep on a 3 inch by 5 inch card (to 1 significant figure)? The correct answer: 200
14.	What is the mass of a common house fly? The correct answer: .01 grams This is about the weight of a quarter. Review Table 1-3 in Giancoli.
15.	What is the speed, to one significant figure, of a common house fly in ordinary flight? The correct answer: 100 cm/sec A fly can crawl that fast. Review Section 1-7 in Giancoli.
16.	The number 9452 in scientific notation is The correct answer: 9.452x10^3 This answer would translate to 945.2. Review Appendix A-4 in Giancoli.
17.	The number .0000475 in scientific notation is The correct answer: 4.75x10^-5
18.	What does 1.23 + 2.50x10^-3 equal? The correct answer: 1.23
19.	The volume of a sphere of radius R is The correct answer:
20.	The surface area of a sphere of radius R is The correct answer: Review Appendix 7 in Giancoli.
21.	The area of a circle of radius R is The correct answer: Review Appendix A-7 in Giancoli.
22.	The circumference of a circle of radius R is The correct answer: Review Appendix 7 in Giancoli.
23.	The diagonal of a square 2.0 meters on a side is The correct answer: 2.8 m. You need to round to two significant figures. Review Appendix A-8 in Giancoli.
24.	The area of a right triangle of base, "b", and height, "h", is The correct answer: b*h/2 This is the area of a rectangle. Review Appendix A-8 in Giancoli.
25.	A 10 L container has a volume expressed in m^3 of The correct answer: .01 m^3