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Welcome to IB Physics II

This text provides solutions for calculating fluid pressure in pipes and electric fields at a given point. It also discusses the course of physics, observations, theories, and research projects.

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Welcome to IB Physics II

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  1. Welcome to IB Physics II

  2. Water flows at 2.00 m/s at ground level with a pressure of 1.15x105 Pa through a 10.0 cm diameter pipe. What is the pressure if it is at an elevation of 3.50 m going through a 6.00 cm diameter pipe? (Find the second speed first. ρ = 1000. kg m-3) v = (10/6)2(2.00 m/s) = 5.55555 m/s P + ½ρv2 = P + ρgh + ½ρv2 1.15E5 + .5(1000)(2.00)2 = P + (1000)9.81(3.50) + .5(1000)(5.5555)2 P = 67,232.9 Pa ≈ 6.72E4 Pa 6.72x104 Pa

  3. A B Each grid is a meter. If charge A is -14.7 μC, and charge B is +17.2 μC, calculate the electric field at the origin: y

  4. mag angle x y A 7773.7 165.96 -7541.6 1885.4 B 19328.5 45 13667.3 13667.3 6125.7 15552.7 Mag 16,715 N/C angle 68.5º (trig angle)

  5. 18Ω 5Ω 6Ω 14Ω 8Ω 8Ω 7Ω 2Ω

  6. 18Ω 5Ω 6Ω 14Ω 8Ω 8Ω 7Ω 2Ω

  7. 18Ω 5Ω 6Ω 14Ω 4Ω 7Ω 2Ω

  8. 18Ω 5Ω 6Ω 14Ω 4Ω 7Ω 2Ω

  9. 18Ω 9Ω 13Ω 14Ω 2Ω

  10. 18Ω 9Ω 13Ω 14Ω 2Ω

  11. 18Ω 5.318318Ω 14Ω 2Ω

  12. 18Ω 5.318318Ω 14Ω 2Ω

  13. 18Ω 14Ω 7.318318Ω

  14. 18Ω 14Ω 7.318318Ω

  15. 18Ω 4.80597Ω

  16. IB Physics • Thermodynamics • Electricity • Currents and circuits • Magnetism • Atomic and Nuclear • Review • IB Test • Special Relativity

  17. The Course of Science Sparse and Infrequent Observations Observational Errors Incorrect Interpretation of Observations Theoretical Misunderstanding Management Directives Oversimplified models Computer Models Controversy Further Refinement of Unimportant Details Code Errors Unrealistic Assumptions Crude Diagnostic Tools Confusion Further Misunderstanding Coincidental Agreement Between Theory and Observations Publication Cover Up

  18. Research Project: • Not just another lab • Look for real unknown • Doesn’t need to be really complicated • Web page has examples • Teaching Possibility • Physics Parties

  19. Communicating with me • Chris Murray • W:503.431.5721 • cmurray@ttsd.k12.or.us • http://tuhsphysics.ttsd.k12.or.us • All of this is on the handout

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