'Nonzero digit' diaporamas de présentation

Scientific Measurement

Scientific Measurement. Chapter 3. Measurements and Their Uncertainty. 3.1. 3.1. Using and Expressing Measurements. Measurements are fundamental to the experimental sciences. For that reason, it is important to be able to make measurements, and to use them correctly when calculating answers.

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Math Unit

Math Unit. Measurement. When making any measurement, always estimate one place past what is actually known. Example. For example, if a meter stick has calibrations (markings) to the 0.1 cm, the measurement must be estimated to the 0.01 cm.

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CHAPTER 2

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Ch 3 Scientific Measurement

Ch 3 Scientific Measurement. Measurements and Calculations in Chemistry. Accuracy refers to the closeness of measurements to the correct or accepted value of the quantity measured. Precision refers to the closeness of a set of measurements of the same quantity made in the same way. .

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Measurements and Conversions

Measurements and Conversions. Why Measure?. Measurements give specific information Different types: - Base Units: System International Units (or Metric) Standard for many scientific measurements - Derived Units Combinations of base units Ex: density or volume. Metric Units

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Spring 2013 Student Performance Analysis

Spring 2013 Student Performance Analysis. Grade 5 Mathematics Standards of Learning. Presentation may be paused and resumed using the arrow keys or the mouse. Identifying Prime and Composite Numbers. SOL 5.3 The student will

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2012 MATH FIELD DAY MENTAL ARITHMETIC No Calculators No Pencil/Paper Computation

2012 MATH FIELD DAY MENTAL ARITHMETIC No Calculators No Pencil/Paper Computation.

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ORBITAL MOTION

ORBITAL MOTION. Formulas. Aphelion, perihelion refer to farthest distance, and closest to the Sun. Apogee, perigee refer to farthest distance and closest to the Earth. (peri is the closest). Finding the semi major axis. This is the average distance from the orbiting body.

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Significant Figures and Scientific Notation

Significant Figures and Scientific Notation. Chemistry Pre-teach. Significant Figures. The significant figures of a number are those digits that carry meaning in its precision . Precision How well a value can be reproduced through repeated measurement. Accuracy

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Significant Digits

Significant Digits. Measuring with Precision. Significant Digits (sd). Defn: Those numbers that result from directly measuring an object. It shows the precision of the measurement. Units must be included (no units no sd) The precision of the measurement depends upon the measuring instrument

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Do Now

Do Now. Express in your own words the importance of Sig Figs. Metric System. Units and Conversions. Scientific Notation.

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Significant Figures

Significant Figures. Used to report all precisely known numbers + one estimated digit. Rule #1. Every nonzero digit is significant Examples: 24 = 2 3.56 = 3 7 = 1. Rule #2. Zeros between non-zeros are significant Examples: 7003 = 4 40.9 = 3 . Rule #3.

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Significant Figures

Significant Figures. Used to report all precisely known numbers + one estimated digit. Rule #1. Every nonzero digit is significant Examples: 24 = 2 3.56 = 3 7 = 1. Rule #2. Zeros between non-zeros are significant Examples: 7003 = 4 40.9 = 3 . Rule #3.

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Significant Digits

Significant Digits. How do you determine where to round off your answers?. Counting Significant Digits. 1. A nonzero digit is always significant. 2. Zeros between nonzero digits are always significant. 3. Zeros at the beginning of a number are never significant.

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The Actual Rules for Determining the Number of Significant Figures

The Actual Rules for Determining the Number of Significant Figures. 1. Every nonzero digit is significant (ex. 2317.9 ) 2. Sandwiched zeros are significant (ex. 404 )

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Significant Figures

Definition: Measurement with Sig Figs: . Digits in a measurement that have meaning relative to the equipment being used. Digits that can be known precisely plus a last digit that must be estimated. Depends on the equipment being used to measure. Significant Figures.

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