Number and Algebra Some Basic Necessities Number sets
Number and Algebra Some Basic Necessities
Number sets �
Exercises: �
Approximations and Error �Exact Value vs. Approximate value
Significant Figures �Unless otherwise state in the questions, answers must be given exactly or to 3 significant figures. Rules for Significant Figures All non-zero digits are significant 2548. 37 has 6 sf Zeros between non-zero digits are significant 1, 005 has 4 sf Zeros to the left of the first non-zero digit are not significant 0. 025 has 2 sf Zeros places after other digits but to the right of the decimal place are significant 0. 200 has 3 sf
Significant Figures �How many sf do the following have? � 1, 005. 02 � 450. 00 � 0. 000001 � 0. 00020 �Write 5, 245 correct to 3 sf �Write 0. 002 correct to 3 sf
Percentage Errors �
Number and Algebra Measurement and Conversions
Warm-up #1 1) What are the only 3 countries in the world that do not solely utilize the metric system?
SI Units of Measurement �
National Metric Week!!!! �Each year, the week containing 10 October — the tenth day of the tenth month — is National Metric Week.
SI Units of Measurement Base Quantity Base Unit Name Base Unit Symbol Length metre m Mass kilogram kg Time second s Electric current ampere A Temperature kelvin K Amount of substance mol Intensity of Light condela cd
Derived Units �Derived units are expressed in terms of base units: �square metre = m 2 �cubic metre = m 3 �metres per second = m/s-1
Prefix Names/Symbols K H D B D C M �Example: Convert the following to the stated units � 0. 8 m to cm 2 � 15, 900 cm to dam 3 � 200 m to mm 3 2
Non-SI Units accepted in SI
Temperature Scale Fahrenheit (°F) Celsius (°C) Kelvin (°K) Freezing Point Boiling Point of Water 32° 0° 273. 15° 212° 100° 373. 15°
Temperature Cont. �
Examples: 1) Convert 25°C to °F 2) Convert 300 K to °F 3) Convert 200°F to °C
This would all be easier if we ONLY had the metric system…
- Slides: 20