Using Conversion Factors
This document was uploaded by user and they confirmed that they have the permission to share it. If you are author or own the copyright of this book, please report to us by using this DMCA report form. Report DMCA
Overview
Download & View Using Conversion Factors as PDF for free.
More details
- Words: 522
- Pages: 16
Chapter 1 Measurements Problem Solving fsUsing Conversion Factors
LecturePLUS Timberlake
1
Initial and Final Units 1. A person has a height of 2.0 meters. What is that height in inches? Initial unit = m
Final unit = _______
2) Blood has a density of 0.05 g/mL. If a person lost 0.30 pints of blood at 18°C, how many ounces of blood would that be? Initial = pints
Final unit = _______ LecturePLUS Timberlake
2
How many minutes are in 2.5 hours? Initial unit 2.5 hr Conversion factor 2.5 hr x 60 min 1 hr cancel
Final unit = 150 min
Answer (2 SF) LecturePLUS Timberlake
3
Learning Check A rattlesnake is 2.44 m long. How long is the snake in cm? 1) 2440 cm 2) 244 cm 3) 24.4 cm
LecturePLUS Timberlake
4
Solution A rattlesnake is 2.44 m long. How long is the snake in cm? 2) 244 cm 2.44 m x 100 cm 1m
= 244 cm
LecturePLUS Timberlake
5
Learning Check How many seconds are in 1.4 days? Unit plan: days
hr
1.4 days x 24 hr x 1 day
min
seconds
??
LecturePLUS Timberlake
6
Solution CF2 Unit plan: days
hr
min
seconds
2 SF Exact 1.4 day x 24 hr x 60 min x 60 sec 1 day 1 hr 1 min = 1.2 x 105 sec LecturePLUS Timberlake
7
Unit Check What is wrong with the following setup? 1.4 day
x 1 day 24 hr
x
60 min 1 hr
LecturePLUS Timberlake
x 60 sec 1 min
8
Unit Check
1.4 day
x 1 day 24 hr
Units = day2/hr2
x
60 min 1 hr
x 60 sec 1 min
Not the final unit needed
LecturePLUS Timberlake
9
Learning Check An adult human has 4650 mL of blood. How many gallons of blood is that? Unit plan:
mL
qt
Equalities:
1 quart = 946 mL 1 gallon = 4 quarts
gallon
Your Setup: LecturePLUS Timberlake
10
Solution Unit plan: mL Setup: 4650 mL x 3 SF
1 qt 946 mL 3 SF
qt
gallon
x 1 gal 4 qt exact
= 1.23 gal
LecturePLUS Timberlake
3 SF
11
Steps to Problem Solving
Read problem Identify data Write down a unit plan from the initial unit to the desired unit Select conversion factors Change initial unit to desired unit Cancel units and check Do math on calculator Give an answer using significant figures LecturePLUS Timberlake
12
Learning Check If the ski pole is 3.0 feet in length, how long is the ski pole in mm?
LecturePLUS Timberlake
13
Solution 3.0 ft x 12 in 1 ft
x 2.54 cm x 10 mm = 1 in. 1 cm
LecturePLUS Timberlake
14
Learning Check If your pace on a treadmill is 65 meters per minute, how many seconds will it take for you to walk a distance of 8450 feet?
LecturePLUS Timberlake
15
Solution Initial 8450 ft
x 12 in. 1 ft
x 1 min 65 m
x 2.54 cm x 1 m 1 in.
100 cm
x 60 sec = 2400 sec 1 min final (2 SF) LecturePLUS Timberlake
16
LecturePLUS Timberlake
1
Initial and Final Units 1. A person has a height of 2.0 meters. What is that height in inches? Initial unit = m
Final unit = _______
2) Blood has a density of 0.05 g/mL. If a person lost 0.30 pints of blood at 18°C, how many ounces of blood would that be? Initial = pints
Final unit = _______ LecturePLUS Timberlake
2
How many minutes are in 2.5 hours? Initial unit 2.5 hr Conversion factor 2.5 hr x 60 min 1 hr cancel
Final unit = 150 min
Answer (2 SF) LecturePLUS Timberlake
3
Learning Check A rattlesnake is 2.44 m long. How long is the snake in cm? 1) 2440 cm 2) 244 cm 3) 24.4 cm
LecturePLUS Timberlake
4
Solution A rattlesnake is 2.44 m long. How long is the snake in cm? 2) 244 cm 2.44 m x 100 cm 1m
= 244 cm
LecturePLUS Timberlake
5
Learning Check How many seconds are in 1.4 days? Unit plan: days
hr
1.4 days x 24 hr x 1 day
min
seconds
??
LecturePLUS Timberlake
6
Solution CF2 Unit plan: days
hr
min
seconds
2 SF Exact 1.4 day x 24 hr x 60 min x 60 sec 1 day 1 hr 1 min = 1.2 x 105 sec LecturePLUS Timberlake
7
Unit Check What is wrong with the following setup? 1.4 day
x 1 day 24 hr
x
60 min 1 hr
LecturePLUS Timberlake
x 60 sec 1 min
8
Unit Check
1.4 day
x 1 day 24 hr
Units = day2/hr2
x
60 min 1 hr
x 60 sec 1 min
Not the final unit needed
LecturePLUS Timberlake
9
Learning Check An adult human has 4650 mL of blood. How many gallons of blood is that? Unit plan:
mL
qt
Equalities:
1 quart = 946 mL 1 gallon = 4 quarts
gallon
Your Setup: LecturePLUS Timberlake
10
Solution Unit plan: mL Setup: 4650 mL x 3 SF
1 qt 946 mL 3 SF
qt
gallon
x 1 gal 4 qt exact
= 1.23 gal
LecturePLUS Timberlake
3 SF
11
Steps to Problem Solving
Read problem Identify data Write down a unit plan from the initial unit to the desired unit Select conversion factors Change initial unit to desired unit Cancel units and check Do math on calculator Give an answer using significant figures LecturePLUS Timberlake
12
Learning Check If the ski pole is 3.0 feet in length, how long is the ski pole in mm?
LecturePLUS Timberlake
13
Solution 3.0 ft x 12 in 1 ft
x 2.54 cm x 10 mm = 1 in. 1 cm
LecturePLUS Timberlake
14
Learning Check If your pace on a treadmill is 65 meters per minute, how many seconds will it take for you to walk a distance of 8450 feet?
LecturePLUS Timberlake
15
Solution Initial 8450 ft
x 12 in. 1 ft
x 1 min 65 m
x 2.54 cm x 1 m 1 in.
100 cm
x 60 sec = 2400 sec 1 min final (2 SF) LecturePLUS Timberlake
16
Related Documents
Using Conversion Factors
November 2019 25
Conversion Factors
November 2019 42
Conversion Factors
June 2020 20
Conversion Factors
May 2020 27
