M OTION AKA: Physics. W HAT IS PHYSICS ? VIDEO I S T HIS M OTION ? If you want to understand how an object (like a car, ball, person, or rocket) moves,

Slides:

Advertisements

Similar presentations

Significant Figures Every measurement has a limit on its accuracy based on the properties of the instrument used. we must indicate the precision of the.

Advertisements

 When we count we use exact numbers  If we count people we have exactly 4 people  There is no uncertainty about this number of people.  Measurements.

Precision in Measurements

Math Problems w/Sig Figs When combining measurements with different degrees of accuracy and precision, the accuracy of the final answer can be no greater.

Rules for Significant Figures

Significant Figures.  All measurements are inaccurate  Precision of measuring device  Human error  Faulty technique.

Mr. Baldwin PHYSICS Mathematics & Measurement 9/17/2013

Significant (Measured) Digits Measuring with Precision.

POWERPOINT THE SECOND In which you will learn about: Scientific notation +/-/x/÷ with sig figs Rounding.

IB Chem I Uncertainty in Measurement Significant Figures.

Accuracy, Precision, Signficant Digits and Scientific Notation.

NOTES – SIGNIFICANT FIGURES (SIG FIGS) ANY DIGIT OF MEASUREMENT KNOWN WITH CERTAINTY PLUS ONE FINAL DIGIT WHICH IS ESTIMATED.

Rules For Significant Digits

Aim: How can we perform mathematical calculations with significant digits? Do Now: State how many sig. figs. are in each of the following: x 10.

Working with Significant Figures. Exact Numbers Some numbers are exact, either because: We count them (there are 14 elephants) By definition (1 inch =

2.4 Significant Figures in Measurement

Significant Figures Physical Science. What is a significant figure? There are 2 kinds of numbers: –Exact: the amount of money in your account. Known with.

Significant Figures. Significant figures The number of meaningful digits in a measurement including the uncertain digit. “sig figs”

Significant Figures. Rules 1.All nonzeroes are significant 2.Zeroes in-between are significant 3.Zeroes to the left are not significant 4.Zeroes to the.

1 Section 1.3 Approximate Numbers and Significant Digits.

Significant Figures & Rounding Chemistry A. Introduction Precision is sometimes limited to the tools we use to measure. For example, some digital clocks.

Significant Figures (HOW TO KNOW WHICH DIGITS OF A NUMBER ARE IMPORTANT)

Chemistry 100 Significant Figures. Rules for Significant Figures  Zeros used to locate decimal points are NOT significant. e.g., 0.5 kg = 5. X 10 2 g.

Measurement and Sig. Fig. Practice

Significant Figures. What is a significant figure? The precision of measurements are indicated based on the number of digits reported. Significant figures.

Significant Figures Physical Science. What is a significant figure? There are 2 kinds of numbers: –Exact: counting objects, or definitions. –Approximate:

Drill – 9/14/09 How many significant figures: Now complete the back of the measurement worksheet from last week (the graduated.

All measurements are subject to uncertainties. All instruments used are influenced by external circumstances, and the accuracy of a measurement may be.

Significant Figures… Bluefield High School 1. What is a significant digit? Significant digits is a set of internationally accepted rules for measurement.

Significant Figures. Rule 1: Digits other than zero are significant 96 g = 2 Sig Figs 152 g = __________ Sig Figs 61.4 g = 3 Sig Figs g = __________.

Significant Figures and Scientific Notation. What is a Significant Figure? There are 2 kinds of numbers:  Exact: the amount of money in your account.

Significant Digits or Significant Figures. WHY??? The number of significant figures in a measurement is equal to the number of digits that are known with.

MEASUREMENT AND CALCULATIONS Chapter 9.2. Significant Digits The international agreement about the correct way to record measurements: Record all those.

Mathematical Operations with Significant Figures Ms. McGrath Science 10.

Significant Figures Chemistry I. Significant Figures The numbers reported in a measurement are limited by the measuring tool Significant figures in a.

 1. Nonzero integers. Nonzero integers always count as significant figures. For example, the number 1457 has four nonzero integers, all of which count.

SIG FIGURE’S RULE SUMMARY COUNTING #’S and Conversion factors – INFINITE NONZERO DIGIT’S: ALWAYS ZERO’S: LEADING : NEVER CAPTIVE: ALWAYS TRAILING :SOMETIMES.

PHYSICS AND MOTION. If you want to understand how an object (like a car, ball, person, or rocket) moves, you have to understand three things about what.

Significant Figures. What is a significant figure?  There are 2 kinds of numbers:  Exact: the amount of money in your account. Known with certainty.

Rules for Significant Figures

Unit 3 lec 2: Significant Figures

Learning Targets I can use correct numbers of significant figures and units in both measurements and calculations. I can accurately measure mass and volume.

Math of Chem I Textbook Chapter 1 Aim:

Significant Figures Why significant figures are important

Significant Figures Sig Figs.

Precision in Measurements

Significant Figures.

Measurement: Significant Figures

Significant Figures Why significant figures are important

Determining the number of sig digs in a measurement

SIG FIGURE’S RULE SUMMARY

Unit-1 Physics Physical World and Measurements

Significant Figures.

Introduction to Chemistry Part 2

How many Sig Figs? Start counting sig figs at the first non-zero.

Significant Digits or Significant Figures

Significant Figures

Rules for Significant Digits

Unit 1 lec 3: Significant Figures

Metric Units Tuesday, 01 January 2019.

Significant digits.

Significant Figures or Digits

5. Significant Figures- = represent the valid digits of a measurement and tells us how good your instrument is.

Metric Units Monday, 22 April 2019.

Using Significant Digits

Significant Figures Part 1: Counting Sig figs

How do you determine where to round off your answers?

Measurement and Calculations

Aim: How do we determine the number of significant figures in a measurement? Warm Up What is the difference between the values of 3, 3.0, and 3.00.

Introduction to Significant Figures &

Presentation transcript:

M OTION AKA: Physics

W HAT IS PHYSICS ?

VIDEO

I S T HIS M OTION ? If you want to understand how an object (like a car, ball, person, or rocket) moves, you have to understand three things about what it means "to be moving." These three things are: Position. This is precisely where an object is located. Speed. Precisely how fast an object is moving. Acceleration. Precisely how fast an object's speed is changing.

P RECISION & M EASUREMENT 'Precision' refers to 'the number of significant digits' or the 'number of decimal places' you use when recording the result. Even if the person making a measurement is as accurate as humanly possible, limitations imposed by the measuring instrument, variations in dimensions of the object being measured, and the conditions under which the measurement is being made, dictate that the result should not imply greater precision than circumstances warrant.

T IPS KNOW THIS! All digits included in a stated value, with the exception of leading zeros, are significant. Ignore the decimal point when counting sig figs. How many sig figs? 1.25 cm mph m/s 0.57 km m cm 60 mm WHEN ALL ELSE FAILS look to YODA!

P RECISION R ULE FOR A DDING & S UBTRACTING The answer of an addition or a subtraction should be rounded off to the least precise value involved. (the measurement with the fewest decimal places). e.g cm cm cm ( math answer ) cm (answer has only one decimal place because cm has only 1 decimal place and is the least precise)

R OUNDING If the digit after the one you want to keep is 5 or greater, then round up m rounded to 2 significant digits is 3.5 m. If the digit after the one you want keep is less than 5, then round down m rounded to 2 significant digits is 3.4 m.

T HE C ERTAINTY R ULE FOR M ULTIPLYING & D IVIDING If you’re multiplying two 4 digit numbers your answer will produce a seven or eight digit answer. How do we know how many significant digits to include? Follow this rule: When multiplying and/or dividing, the answer has the same number of significant digits as the measurement with the fewest number of significant digits.

D ISTANCE & T IME Distance is the amount of space between two objects or points. The most common unit of measurement is the metre. The most common units of distance (length) and their relationships are: km = kilometre m = metre cm = centimetre mm = millimetre 1 km = 1000 m 1 m = 100 cm 1 cm = 10 mm

T IME Time is the duration between two events, and is usually measured in seconds, minutes, or hours. The units of time and their relationships are: d = day h = hour min = minute s = second 1 day = 24 h 1 h = 60 min 1 min = 60 s

 Y OUR T URN  Work on the Measurement and Sig Figs Sheets for homework.