Rules as long as Sig Fig Rules as long as Calculating with Significant Figures Rules as long as Rounding in Calculations Rules as long as Rounding in Calculations Objectives

Rules as long as Sig Fig Rules as long as Calculating with Significant Figures Rules as long as Rounding in Calculations Rules as long as Rounding in Calculations Objectives www.phwiki.com

Rules as long as Sig Fig Rules as long as Calculating with Significant Figures Rules as long as Rounding in Calculations Rules as long as Rounding in Calculations Objectives

Kilday, Gregg, Film Editor has reference to this Academic Journal, PHwiki organized this Journal Rules as long as Sig Fig Rules as long as Calculating with Significant Figures Rules as long as Rounding in Calculations

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Rules as long as Rounding in Calculations Objectives Interpret data in tables in addition to graphs, in addition to recognize equations that summarize data. Distinguish between conventions as long as abbreviating units in addition to quantities. Use dimensional analysis to check the validity of equations. Per as long as m order-of-magnitude calculations. Mathematics in addition to Physics Tables, graphs, in addition to equations can make data easier to underst in addition to . For example, consider an experiment to test Galileo’s hypothesis that all objects fall at the same rate in the absence of air resistance. In this experiment, a table-tennis ball in addition to a golf ball are dropped in a vacuum. The results are recorded as a set of numbers corresponding to the times of the fall in addition to the distance each ball falls. A convenient way to organize the data is to as long as m a table, as shown on the next slide.

Data from Dropped-Ball Experiment A clear trend can be seen in the data. The more time that passes after each ball is dropped, the farther the ball falls. Graph from Dropped-Ball Experiment One method as long as analyzing the data is to construct a graph of the distance the balls have fallen versus the elapsed time since they were released. The shape of the graph provides in as long as mation about the relationship between time in addition to distance. Interpreting Graphs

Physics Equations Physicists use equations to describe measured or predicted relationships between physical quantities. Variables in addition to other specific quantities are abbreviated with letters that are boldfaced or italicized. Units are abbreviated with regular letters, sometimes called roman letters. Two tools as long as evaluating physics equations are dimensional analysis in addition to order-of-magnitude estimates. Equation from Dropped-Ball Experiment We can use the following equation to describe the relationship between the variables in the dropped-ball experiment: (change in position in meters) = 4.9 (time in seconds)2 With symbols, the word equation above can be written as follows: Dy = 4.9(Dt)2 The Greek letter D (delta) means “change in.” The abbreviation Dy indicates the vertical change in a ball’s position from its starting point, in addition to Dt indicates the time elapsed. This equation allows you to reproduce the graph in addition to make predictions about the change in position as long as any time. Evaluating Physics Equations

Multiple Choice 1. What area of physics deals with the subjects of heat in addition to temperature A. mechanics B. thermodynamics C. electrodynamics D. quantum mechanics St in addition to ardized Test Prep Chapter 1 Multiple Choice 1. What area of physics deals with the subjects of heat in addition to temperature A. mechanics B. thermodynamics C. electrodynamics D. quantum mechanics St in addition to ardized Test Prep Chapter 1 Multiple Choice, continued St in addition to ardized Test Prep Chapter 1 2. What area of physics deals with the behavior of subatomic particles F. mechanics G. thermodynamics H. electrodynamics J. quantum mechanics

Multiple Choice, continued St in addition to ardized Test Prep Chapter 1 2. What area of physics deals with the behavior of subatomic particles F. mechanics G. thermodynamics H. electrodynamics J. quantum mechanics Multiple Choice, continued 3. What term describes a set of particles or interacting components considered to be a distinct physical entity as long as the purpose of study A. system B. model C. hypothesis D. controlled experiment St in addition to ardized Test Prep Chapter 1 Multiple Choice, continued 3. What term describes a set of particles or interacting components considered to be a distinct physical entity as long as the purpose of study A. system B. model C. hypothesis D. controlled experiment St in addition to ardized Test Prep Chapter 1

Multiple Choice, continued 4. What is the SI base unit as long as length F. inch G. foot H. meter J. kilometer St in addition to ardized Test Prep Chapter 1 Short Response 13. Determine the number of significant figures in each of the following measurements. A. 0.0057 kg B. 5.70 g C. 6070 m D. 6.070 103 m St in addition to ardized Test Prep Chapter 1 Short Response 13. Determine the number of significant figures in each of the following measurements. A. 0.0057 kg B. 5.70 g C. 6070 m D. 6.070 103 m Answers: A. 2; B. 3; C. 3; D. 4 St in addition to ardized Test Prep Chapter 1

Short Response, continued 14. Calculate the following sum, in addition to express the answer in meters. Follow the rules as long as significant figures. (25.873 km) + (1024 m) + (3.0 102 cm) St in addition to ardized Test Prep Chapter 1 Short Response, continued 14. Calculate the following sum, in addition to express the answer in meters. Follow the rules as long as significant figures. (25.873 km) + (1024 m) + (3.0 102 cm) Answer: 26 897 m St in addition to ardized Test Prep Chapter 1

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Kilday, Gregg Film Editor

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