Homework #1 (Ch. 1)-solutions

Homework #1 (Ch. 1)-solutions - kim(jyk235 Homework 1(Ch 1...

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kim (jyk235) – Homework 1 (Ch. 1) – lewis – (20677) 1 This print-out should have 28 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. 001 10.0 points A school bus would have what relationship to a meter? 1. shorter than 2. longer than correct 3. the same as Explanation: “Waist high” on an average person is a fairly reasonable approximation for a meter. 002 10.0 points A fisherman catches two sturgeons. The smaller of the two has a measured length of 94.90 cm (two decimal places and four signif- icant figures), and the larger fish has a mea- sured length of 144.0 cm (one decimal place and four significant figures). What rule must be used on the sum to find the total length of the two fish? 1. Whole number (239 cm) 2. Two significant figures (240 cm) 3. Four significant figures (238.9 cm) 4. Hundreds (240 cm) 5. Tenths (238.9 cm) correct 6. Hundredths (238.90 cm) 7. Five significant figures (238.90 cm) 8. None of these 9. Three significant figures (239 cm) Explanation: For addition/subtraction: least precise measurement length = 94 . 90 cm + 144 . 0 cm = 238 . 9 cm The least precise measurement is a tenth of a cm. 003 10.0 points Length is to meter as 1. mass is to kilogram. correct 2. weight is to mass. 3. density is to volume. 4. liter is to distance. Explanation: The standard metric unit for length is the meter, and the standard metric unit for mass is the kilogram. 004 10.0 points What unit of measure would you use for mass? 1. cubic centimeters 2. None of these 3. grams correct 4. liters Explanation: Liters and cubic centimeters are units of measure for volume. 005 (part 1 of 4) 10.0 points Use significant figures to find the sum of the measurements 755 g, 37 . 6 g, 0 . 84 g, and 2 . 8 g. 1. Two significant figures (800 g) 2. None of these 3. Tenths (796.2 g) 4. Hundredths (796.24 g) 5. Tens (800 g)
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kim (jyk235) – Homework 1 (Ch. 1) – lewis – (20677) 2 6. One significant figure (800 g) 7. Three significant figures (796 g) 8. Whole number (796 g) correct Explanation: For addition/subtraction: least precise
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