Chapter 3

The Metric System

§3.1 – Introduction

• Systems– Imperial system– Metric system (SI)– Use in industry

• Table 3.1 (p. 125)• Table 3.3 (p. 126)• Problems 3.1 #2, 10, 14, 20, 32, 36

§3.2 3.3 – thru Length and Mass

• Length (meter and other units)– Problem 3.2 #40, 44, 54, 56, 62

• Mass (gram and other units)– Problem 3.3 #36, 44

§3.4 – Volume and Area• Volume– Liquid measurements– Spatial measurements– Figures 3.10 and 3.11 (p. 133)– Liquid units – Liter (and other)

• Do problems 3.4 #8, 40

– Spatial units – m3 (and other)• Do problems 3.4 #10, 45

• Volumes / mass relationships– 1 g = 1 cm3 = 1 mL– Ex: How many mL in 0.5 m3?

What is the mass of 0.5 m3?

§3.5 – , , & Time CurrentPower

• Time – seconds (other units)– Problem 3.5 #26

• Current (Amp and other)• Power (Watt and other)– Problems 3.5 #16, 32

§3.6 – Temperature

• Temperature scales– Celsius, Kelvin, Fahrenheit• Water boils (100⁰C, 373K, 212⁰F)• Water freezes (0⁰C, 273K, 32⁰F)

– Conversion formulas

• Convert 42.3⁰F to Celsius• A child has a temperature of 37⁰C. Is the child running

a fever?

325

9 )32(

9

5CFFC

§3.7 – Metric and USConversions

• Need for conversion in industry• Conversion section of reference card in book– Problem 3.7 #2, 18– A common engine size in late 1970s model Pontiac

Firebirds used to be 305 in3. By the late 1980 models a common size was 5.0L. Is there a significant difference in these engine sizes?

• Graded Activity #4