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Lab 01

Astronomy 105 Laboratory. Lab 01. Astronomy 105 – Section 29. Astronomy Lab Coordinator Mr. Michaels Teaching Assistant Andrew Kocurek. Astronomy 105 Lab Policies. Seating 6 people to a table (back and ends only facing screen) Astronomy 105 Labs are not a team effort

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Lab 01

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  1. Astronomy 105 Laboratory Lab 01

  2. Astronomy 105 – Section 29 • Astronomy Lab Coordinator • Mr. Michaels • Teaching Assistant • Andrew Kocurek

  3. Astronomy 105 Lab Policies • Seating • 6 people to a table (back and ends only facing screen) • Astronomy 105 Labs are not a team effort • Everyone works through the lab exercise individually • Come prepared! • Reading assignment(see Indoor Calendar on syllabus) • Quiz at beginning of lab (clicker required) • Bring required supplies • Clicker, clear plastic ruler (cm), pencil, calculator, lab manual • Use pencil only, neatness and accuracy important!!

  4. Astronomy 105 Lab Policies • Grading • 12 labs -- 11 indoor and 1 outdoor lab • Lab Average = (Average of Lab Exercises X 0.70) +(Clicker Average X 0.10) + (Lab Exam X 0.20) • Lab Average is 25% of course grade • The same grade will be recorded for both lecture & lab. • Absences • A grade of zero is recorded for every unexcused absence. --No makeup labs-- • Roll called at beginning of lab -- Don’t be late!

  5. Cell Phone Policy • Cell phones must be turned off in lab • No cell phone use of any kind is allowed (including texting, calculator use, games or leaving class to answer phone …) • Students observed using a cell phone will lose 10 points off their daily lab grade – if a second warning is given the daily grade will be zero.

  6. Ast 105 Web Resources • Lab Home Page • Lab Syllabus • Night Lab Calendar and Signup • Access Lab Grades by CID • PowerPoint Slides for Review • Lecture Links

  7. Astronomy 105 Outdoor Lab • Night-lab Signup • Meet at the bus stop a few minutes early(See signup web page for bus departure time) • If cloudy you will need to signup again • Bring your star chart and other supplies.

  8. Channel Setting Instructionsfor ResponseCard XR • Press and release the “MENU” button. • Scroll down to “Change Channel” using the “Yes” / ”No” buttons and press “Enter”. • Enter channel number “60” and press “Enter”. • This Message Appears if successful… Channel Changed. √ Receiver Found.

  9. Clicker Registration

  10. Attendance Check…Are you here? • I’m Here • Nope…Lost in Space 100% 0%

  11. Experimental Measurements Lab 01

  12. Experimental Measurements • Significant Figures • Scientific Notation • Experimental Error • Pendulum Experiment

  13. Significant Figures • Measured quantities contain uncertainty • Physical quantities can never be measured with absolute precision • Only retain figures that contain meaningful information

  14. 2 decimal places estimated 4.98 cm How long is the rectangle in centimeters? 3 How many significant figures? How many millimeters? 49.8 mm

  15. How Many Significant Figures 0.089 2 1.089 4 12000 2 12001 5 300.0 4 300.01 5 0.01 1 0.0105 3

  16. Multiplication and Division • Result should have the same number of significant figures as the least accurate number 9.672 = 9.7 4.03 X 2.4 = 3.56398499375 = 3.56 8.55 / 2.399 = 32.9 = 33 7.0 X 4.70 =

  17. 10 raised to an integer power decimal number (1-9) Scientific Notation 3.502 x 106 Number Significant Figures Scientific Notation 9004 4 9.004 x 103 0.000007 1 7 x 10-6 4.3 x 101 43 2 7,805,000,000 4 7.805 x 109 0.0408 3 4.08 x 10-2 8.4 2 8.4 x 100

  18. To multiply two numbers in scientific notation multiply the decimal parts of the numbers and add the exponents algebraically. (4.0 x 104)(2.0 x 103) = (4.0 x 2.0)(104 x 103) = (8.0) x (104+3) = 8.0 x 107 (6.0 x 102)(2.0 x 105) = 12 x 107 = 1.2 x 108

  19. To divide two numbers in scientific notation, divide the decimal parts of each number then subtract the exponents.

  20. 23.0 rewrite 0.1 rewrite Addition and Subtraction 329.5 329.5 329.5 23.03 23.03 0.083 0.083 25.3 25.3 25.3 + + + 377.9

  21. Complete Exercise 1

  22. Experimental Error Sample data for g (m/s2) 9.70 9.95 9.80 9.65 9.90 9.80 Mean Value - Average of data set is 9.80 m/s2 Mean Absolute Deviation Accuracy Accuracy of about 1% (0.08/9.8) x 100% ≈ 0.8%

  23. Using data for g find… mean value mean absolute deviation accuracy Pendulum ExperimentFinding the acceleration due to gravity L – length of pendulum in meters L T – time for one oscillation

  24. Complete Exercise 2

  25. End

  26. What is your current location? • Math-Nursing 101 • International Space Station • Wolf 359 • Miller Science 318 • Pluto 0% 0% 0% 0% 0% 20

  27. Clicker Registration 1. Press the [1/A] Key 2. Press the [Pencil] Key 3. Enter your CID 4. Verify the accuracy 5. Press [Enter] Key

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