1 / 21

Chapter 1

Chapter 1. A Physics Toolkit. 1.1- Mathematics and Physics. Targets: I can write the basic steps of the scientific methods and follow them to solve a problem and compile data appropriately. I can determine what SI unit to use in certain situations.

zalman
Télécharger la présentation

Chapter 1

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Chapter 1 A Physics Toolkit

  2. 1.1- Mathematics and Physics • Targets: • I can write the basic steps of the scientific methods and follow them to solve a problem and compile data appropriately. • I can determine what SI unit to use in certain situations. • I can convert units by using dimensional analysis.

  3. What do you think of when you hear the word physics? (Think-Pair-Share)

  4. What is Physics? • Branch of science that involves the study of the physical world: energy, matter, and how they are related. • Investigates motions of electrons and rockets, the energy in sound waves and electric circuits, the structure of the proton and of the universe

  5. Scientific Method • What are the steps?

  6. Scientific Method- an organized plan for gathering, organizing, and communicating information • Scientific Theory- well-tested explanation for a set of observations or experimental results • Scientific law- statement that summarizes a pattern found in nature.

  7. Mathematics in Physics • Isolating Variables is important • Example Problem: V=IxR V= Voltage (volts) I= Current (ampere) R= Resistance (ohms) What is the resistance of a light bulb that has a 0.75 ampere current when plugged into a 120 volt outlet?

  8. Check Your Work! • Check to make sure the units are correct • Check to make sure the answer makes sense • Hint: 1 volt= 1 ampere-ohm • Hint: 120 is divided by a number a little less than 1, so the answer should be a little more than 120.

  9. SI Units International System of Units Derived Units- any unit that is made from combining base units

  10. Kids Hate Doing Math During Class Minutes • Converting metric units is easier than in other systems of measurement

  11. Dimensional Analysis • Dimensional Analysis- method of treating units as algebraic quantities, which can be cancelled • Helps in choosing conversion factors • Example Problem: How many millimeters are in 25.2 meters? • Challenge Problem: How many seconds are in a leap year? • Hint: Always show your work so mistakes can be found.

  12. 1.2 Measurement • I can use significant digits correctly when measuring, adding/subtracting, and multiplying/dividing.

  13. Significant Figures • Always measure to the “guessed” place • Always round to least precise measurement when doing arithmetic • All zeros are not significant • Example: 0.00345 has 3 SF 0.45099 has 5 SF 0.95000 has 5 SF

  14. Precision and Accuracy • In Measurement: • Precision- • Accuracy-

  15. 2nd Hour

  16. 6th Hour

  17. 1.3- • Independent Variable • Dependent Variable • Example: Mass vs Spring Length

  18. Line of Best Fit

  19. Linear Relationships • y=mx+b • b= y intercept • m= slope= rise/run= ∆y/∆x

  20. Non-linear Relationships • Quadratic Relationship • y=ax2+bx+c • parabola • Inverse Relationship • y=a/x • hyperbola

More Related