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O'Keefe and Philhour

"There are children playing in the streets who could solve some of my top problems in physics, because they have modes of sensory perception that I lost long ago."— J. Robert Oppenheimer (Oppenheimer headed the Manhattan Project, his brother founded the Exploratorium.) Albert Einstein

Physics Honors

Spring Semester 2010 Course Weblog

  • Week of Monday, January 4
    • Faculty Retreat (Monday & Tuesday)
    • Day 1: Activity Schedule (Wednesday)
      • Recap 1st semester outcomes, performance, grading system & grade distributions, etc.
      • Schedule a visit with your teacher if you'd like to go over the final exam (we will not be distributing them).
      • Big ideas for 2nd semester - fun video
      • Plan for 2nd Semester
        • *** 3rd Quarter (9 weeks)
        • 2 weeks- Conservation Laws
        • 1.5 weeks - Gases & Liquids // Environmental Unit
        • 3.5 weeks - Electrostatics
        • 2 weeks - Electric Circuits
        • *** 4th Quarter (9 weeks - 3 before Spring Break)
        • 3 weeks - Magnetism & Electromagnetism
        • ** Spring Break
        • Introduce Exploratorium project
        • 2 weeks - Light & Optics
        • 2 weeks - Waves & Sound
        • 2 weeks - Electric Circuits Project / AP exams
      • There will be 6 graded units for this semester:
        • Conservation Laws (including sub-unit on gases & liquids)
        • Electrostatics
        • Circuits (only partially finished by end of 3rd quarter -- will finish in 4th quarter)
        • Magnetism
        • Waves & Sound
        • Light & Optics
      • HW
    • Day 2: Activity Schedule (Thursday)
      • Activity: egg-toss -- long times decrease required force for a given momentum change
      • Lecture & demo: momentum & impulse
        • momentum as a vector
        • Newton's 2nd Law revisited
        • change in momentum in bouncing off vs. sticking
        • "rain" / "machine-gun" type problems that generate an average net force through multiple small collisions (note connection to pressure of a gas)
      • HW
    • Day 3: Activity Schedule (Friday)
      • Lecture & demo: momentum conservation in two-cart inelastic collisions
      • 2-dimensional collisions
      • HW

 

  • Week of Monday, January 11
    • Day 1
    • Day 2
      • Lecture: define & use the concept of Work
      • Work done by friction - "sliding to a stop"
      • HW
    • Day 3
      • Work problems in class
        • Mixed momentum-energy problems (ballistic pendulum, elastic collisions)
        • Work PPB Ch 8 #s 17, 18, 20, 25, 26
      • HW
        • finish problems from today
        • take practice exams in advance of Day 4
    • Day 4
      • AOK's classes: Practice Exam (due at the end of class for step 1)
      • BJP's classes:
        • Lab: two-cart collisions
        • Use two range finders, two carts, and a variety of cart weights to verify
          • momentum is conserved in a variety of inelastic AND elastic collision types (one moving, other still; both moving towards each other; one catching up to the other) - calculate a % difference between the momenta before and after the collision -- these should be relatively small
          • kinetic energy is NOT conserved in either real-life inelastic collisions or elastic collisions. We'd expect a greater degree of KE conservation in real-life elastic collisions however. Calculate the kinetic energies of the system before and after the collision and calculate a % difference -- these should be large
          • Writeup will be scored at Step 2
          • Writeup due before unit exam (scheduled for just over 2 weeks from today) - here's the Lab Rubric
          • Start your writeup & analysis early, and come back in to the lab room outside of classtime if you need to repeat or finish any collisions, measurements, etc.
      • HW
        • BJP's classes: begin collisions lab writeup
        • get caught up on HW and study for quiz on day 1
          • plenty of practice quizzes and exams available on PPB site Ch 7 & Ch 8

  • Week of Monday, January 18
    • Monday - Martin Luther King Day (Monday)
    • Day 1
      • Introduce Fluids (Ch's 18 & 19) - Gases & Liquids & why we care
      • Pressure Defined as Force / Area
        • Demo: Bed of Nail
      • Quiz 6.2 on conservation laws
      • HW
        • Read through the material of Ch 18 & Ch 19 in your textbook
        • Finish any corrections or missing work
        • BJP's classes: collisions lab writeup due in two weeks
    • Day 2
      • BJP (3rd & 6th periods):
        • Mini-lecture: work re-envisioned as P(delta-V) [5-10 min]
        • Time for lab work (for collisions lab)
      • AOK (2nd & 4th periods):
        • Kinetic Theory of Matter - practice problems (involving some chemistry)
          • Demo: Mardi Gras Beads
        • Gases: Ch 19
        • Conceptual discussion of pressure of a gas (collisions of particles)
        • Ideal Gas Law
        • Work re-defined as P(delta-V)
      • HW
    • Day 3
      • BJP (3rd & 6th periods): in addition to below, Demo: Mardi Gras Beads
      • Kinetic theory of gases (average KE = 3/2kT)
      • Thermal Energy & Ideal Gas Law -- revisiting the ideal gas law from the perspective of the work-energy theorem
      • How Engines Work
      • HW


  • Week of Monday, January 25
    • Day 1
      • Continued discussion of fluids (from last week)
      • Gases vs Liquids
        • One fundamental difference is that liquids are incompressible meaning that the volume does not change. This means that you can't really increase their internal energy by doing work on a liquid. Likewise, a liquid will only do work if you put an equivalent amount of energy into it at the same time (see hydraulics below)
        • Demo: Syringes with Air & Water
      • Hydraulics & Pascal's Principle
        • The principle is that the pressure is the same everywhere in the liquid (assuming depth isn't at issue). This means you can 'leverage' force by using larger and smaller areas.
        • Hydraulic Lift problem (one car on a lift -- two cars on a lift -- more force needed?)
      • Bernoulli's Principle
        • Work-energy theorem re-written as conservation of kinetic energy density, potential energy density, and pressure
          • Demo: blowing above a piece of paper to get "lift"
          • Thrust force, lift force and drag force for an airplane
        • Conservation of flux -- the quantity velocity times area is conserved in a liquid moving through a pipe
          • pressure in a pipe -- note that larger pipes require lower velocities (to conserve flux), and so have higher pressure (by Bernoilli's principle), which is why the walls are much thicker for big pipe
      • HW
        • Work PPB Ch 18 # 9, 10, 12, 14
        • BJP's classes: collisions lab writeup due in one week
    • Day 2 Meeting Day Tuesday
    • Day 3
      • Pressure of a liquid increases with depth
        • Weight of fluid above leading to this pressure
        • Mariana Trench (deepest part of the ocean)
        • Demo: Peeing Cylinder
      • Buoyancy
        • Buoyant force is equal to the weight of the displaced fluid (gases or liquids)
        • Derivation using pressure considerations
        • Conceptual derivation (from Hewitt): if you push 100 N of water out of the way, it'll push with 100 N of force back at you
      • Work PPB Ch 18 # 2 & 10
      • HW
    • Day 4


  • Week of Monday, February 1
    • Day 1
      • EXAM 6 - Momentum, Energy & Fluids
      • HW
        • None - take a break
    • Day 2
      • Discuss Option of taking AP Physics B Exam
      • Begin Unit 7: Electrostatics
      • Activity
        • Scotch Tape
      • Lecture
        • Review 4 fundamental forces
        • introduce charge fundamentals
          • e = 1.6x10^-19
          • q = +/- N e
        • conductors & insulators
        • Demo: electroscope, charging with rabbit fur & silk, etc.
        • Demo: charged balloon attracted to wall
      • HW
    • Day 3 Kairos
      • Intro to Conservation of Energy involving Charges
      • Repulsion, attraction, & polarization
      • Lecture: electrical potential energy, voltage, U = qV, work required to move charges
        • Demo: Van de Graf generator
        • Practice problems involving electrical potential energy ("roller-coaster" type problems)
      • HW
    • Day 4 Kairos

     


  • Week of Monday, February 15
    • President's Day (Monday)
    • HAPPY MARDI GRAS!...Where in the US did Mardi Gras begin? (Hint...AOK's Hometown)
    • Day 1
    • Ash Wednesday
    • Day 2
      • Demo: Van de Graff generator - pose question (for warmup): why does it only spark when the two are close together? Explain how Van de Graff generator works; similarity to lightning
        • Breakdown electric field of air: E = 3,000,000 N/C
        • Using Work = force x distance to get E = -deltaV/deltax
        • PhET: Charges & Fields - showing that electric field is strongest where equipotential lines are closest together
      • A Force Perspective: Electric Field & Electric Force
      • HW
    • Day 3
      • Quiz 7.2 - Electrostatics
      • HW
        • 3rd & 6th periods: collisions lab final draft due Monday, March 1 (see e-mail from BJP)
        • Mastering Physics - Electrostatics - due 3/1
 
  • Week of Monday, February 22
    • Day 1 Junior Retreat
      • Introduce electric current I = delta-q/delta-t
        • Simple problems: how many electrons pass this point, etc.
      • Microscopic model of copper wires
        • valence electrons, electrons and "holes" (copper has one extra valence electron)
        • why metals are equipotentials, and how you can get flow through wires despite this (compare to a flat tube)
        • generating current with a power supply
      • Demo: Lemon Battery - corresponding chemical reactions
        • Measuring current and voltage with galvanometers
        • Try to get a lemon for Day 2 for you and your partner.
      • HW
    • Day 2 Junior Retreat
      • PhET Simulation: Magnets and Electromagnets
      • Lab Activity
        • Lemon batteries - hopefully you brought a lemon?
          • Build a lemon battery and show us it works by hooking several up in series and lighting an LED!
        • Magnets - tracing out magnetic fields with a compass
          • Use small compasses to figure out the direction of the magnetic field vector at any point. Then, move the compass around to get a feeling for the 3-D field
        • Demo: Kicking-wire
          • Switch the power supply around -- what happens? Why?
        • Hand-crank generators & light bulb experimentation
          • Hook one up to a light bulb
          • Hook one up to nothing
          • Hook one up to another hand-crank generator!
        • Black & white television & magnets (warning: do NOT do this with color televisions)
          • Play around -- what do you think is going on?
        • Demo: Hand-built electric motor (with magnet wire)
          • We'll have one running - your job is to hypothesize about what's going on!
        • Demo: Jacob's Ladder
          • You know the breakdown electric field for air is 3 million N/C ... so can you figure out how much voltage there must be between the two vertical wires? Knowing that the wall plug is at 120 V, what is the job of the transformer?
          • Why does the current arc rise? The answer is pretty simple...
      • HW
        • Mastering Physics - Electrostatics - due 3/1
        • Retreatants: read the Lemon Battery handout, catch up on all the homework, and get a friend to walk you through the Lab Activity from Day 2
    • Day 3
      • Introduce Magnetism
        • Calculating & Sketching Magnetic Field around a current-carrying wire
        • Right Hand Rule (RHR) #1
        • Superposition of Magnetic Field around two wires
        • PhET: Magnet & Compass
      • HW
    • Day 4
      • Lorentz / Magnetic Force on a single charge
        • Calculating the magnetic force felt by a charge moving through a field made by a wire
        • Right Hand Rule (RHR) #2
      • How magnets work -- how they stick to metals, etc. Iron/nickel/cobalt vs. other metals
      • HW

 


  • Week of Monday, March 1
    • Day 1
      • EXAM 7 - Electrostatics
      • HW
    • Day 2
      • Demo: hand-held Tesla coil and electron beam - deflecting beam with magnet
      • Lorentz Force on a wire immersed in a magnetic field
        • Attraction and repulsion of wires due to magnetism - like currents ATTRACT, opposite currents REPEL, strangely enough! Note that the language is backward from positive/negative charges
      • How galvanometers (current meters and voltmeters) work
      • Practice problems
      • HW
    • Day 3
    • Day 4

 

  • Week of Monday, March 8
    • Monday, Tuesday, & Wednesday
      • Midterms
        • Step 4 for Unit 6 (Conservation Laws, Fluids, etc. -- not electrostatics or magnetism)
          • 2nd period on Monday
          • 3rd & 6th periods on Tuesday
          • 4th period on Wednesday
    • Thursday
      • Faculty Inservice
    • Friday
      • Quarter Break

BJP's shared items in Google Reader


  • Week of Monday, March 15
    • Monday is a holiday
    • Day 1
      • Magnetic Induction - conceptual
      • Motors and generators -- using magnetic forces to "generate" voltages and vice-versa (motors and generators as inverse processes)
      • PhET: Faraday's Electromagnetic Lab
      • Demo: turning a coil in the Earth's magnetic field to generate electricity
      • Demo: toroid with sparking copper wire
      • Time permitting: begin building an Electric Motor!
      • HW
        • Mastering Physics - Magnetism - due Thursday 8:30 am (approx. 30 min in length)
        • Work Practice Exam on Magnetism from the PPB Ch 14 - skip any questions about induced current or voltage, induction, Faraday's Laws, or Lenz's Laws
    • Day 2
      • Demo: ring and/or rebar launcher
      • Build/finish Electric Motor
      • Build a Speaker!
      • HW
    • Day 3
      • 3rd & 6th Periods
        • Exam 8.2 - Magnetism - note that this will not include any mathematical material on induction, so the practice exams from past years might look strange -- just a heads-up
      • 2nd & 4th Periods
        • Build a Speaker!
        • Return to Circuits
          • PhET Circuit Construction Kit
          • Ohm's Law I = V/R
          • Power, P = I V -- how it is derived from U = qV
            • 1 kiloWatt-hour = 3.6 MJ
            • Cost of Power: 1 kW-hr ~13 cents in San Francisco
            • Demo: Power Meter & Hair Dryer
      • HW

 

  • Week of Monday, March 22
    • Day 1 Junior Retreat
      • 2nd & 4th Periods
        • Exam 8 - Magnetism
      • 3rd & 6th Periods
        • Return to Circuits
          • Circuit kits
          • PhET Circuit Construction Kit
          • Ohm's Law I = V/R
          • Power, P = I V -- how it is derived from U = qV
            • 1 kiloWatt-hour = 3.6 MJ
            • Cost of Power: 1 kW-hr ~13 cents in San Francisco
            • Demo: Power Meter & Hair Dryer
      • HW
    • Day 2 Junior Retreat
    • Day 3 Kairos
      • Warmup: circuits kits
      • Complex Circuits
      • Begin this Circuits Worksheet 2 
        • (Here's a Key but there's a mistake in #1 circuit B ammeter 2, the current should be 1.5 A, not 1.8 A).
        • If you have trouble come to a HW party or use the public folders...this stuff takes practice but isn't too bad once you understand the rules
      • HW
    • Day 4 Kairos
      • Warmup: circuits kits
      • Work on Electric Circuits project
        • Work Project 1 in the Electric Circuits project; if you finish early, move on to Project 6 (BUT DO NOT TURN ON POWER until your teacher has checked the placement of your ammeter!!!!!)
        • Remember not to destroy the ammeters: they must ALWAYS be in series with a resistor!!!
        • You can continue to work this project on your own time throughout the 4th quarter
      • HW
  • Week of Monday, March 29
    • Day 1
      • Quiz 9.1 - Circuits
      • HW
        • None
    • Day 2
      • Special Activity: Educational philosophies
      • HW
        • None - have an enjoyable and relaxing break
        • If you are taking the AP Physics B Exam - use this break to review material from last semester

 

Spring Break (Thursday Apr 1 - Sun Apr 11)

  • Week of Monday, April 12
    • Day 1 (Activity Schedule)
    • Day 2 (Activity Schedule)
      • Circuit kits
      • Review Electric Circuits
      • HW
        • Study for Exam
    • Day 3 (Activity Schedule)
      • EXAM 9 - Circuits
      • HW
        • TBA
    • Day 4 Special Schedule TBA
    • Day 5 Special Schedule TBA

  • Week of Monday, April 19
    • Day 1
      • Begin Light & Optics
      • HW
        • TBA
    • Day 2 (Meeting Day Tuesday)
      • TBA
      • HW
        • TBA
    • Day 3 Kairos
      • TBA
      • HW
        • TBA
    • Day 4 Kairos & (Prayer Service Thursday)
      • TBA
      • HW
        • TBA

  • Week of Monday, April 26
    • Day 1 Junior Retreat
      • TBA
      • HW
        • TBA
    • Day 2 Junior Retreat
      • TBA
      • HW
        • TBA
    • Day 3 BJP Ignatian evening Wednesday
      • TBA
      • HW
        • TBA
    • Day 4
      • TBA
      • HW
        • TBA

  • Week of Monday, May 3 - BJP Student Center proctor
    • Day 1 AP Exams Monday - US Gov & Politics
      • Begin Waves & Sound
      • HW
        • TBA
    • Day 2 AP Exams Tuesday - Computer Science, Spanish, Statistics
      • TBA
      • HW
        • TBA
    • Day 3 AP Exams Wednesday - Calculus
      • TBA
      • HW
        • TBA
    • Day 4 AP Exams Thursday - English Lit & Comp / Friday - US History
      • TBA
      • HW
        • TBA

  • Week of Monday, May 10 - BJP Student Center proctor
    • Day 1 AP Exams Monday - Biology, Physics
      • TBA
      • HW
        • TBA
    • Day 2 AP Exams Tuesday - Chemistry, Psychology
      • TBA
      • HW
        • TBA
    • Day 3 AP Exams Wednesday - English Lang & Comp
      • TBA
      • HW
        • TBA
    • Day 4 AP Exams Thursday - World History / Friday
      • TBA
      • HW
        • TBA

  • Week of Monday, May 17 - BJP Student Center proctor
    • Day 1
      • TBA
      • HW
        • TBA
    • Day 2
      • TBA
      • HW
        • TBA
    • Day 3
      • TBA
      • HW
        • TBA
    • Short Day 5
      • TBA
      • HW
        • TBA
    • Faculty Inservice (Friday)
    • BJP - proctor senior prom (Saturday)

  • Week of Monday, May 24 - BJP Student Center proctor
    • Day 1 (Activity Schedule) - Senior class holiday
      • TBA
      • HW
        • TBA
    • Day 2 (Activity Schedule)
      • TBA
      • HW
        • TBA
    • Day 3 (Activity Schedule)
      • TBA
      • HW
        • TBA
    • Transition Liturgy (Thursday)
    • Awards Assembly (Friday)

  • Week of Monday, May 31
    • Memorial Day (Monday)
    • Final Exams (Tuesday)
    • Final Exams (Wednesday)
    • Final Exams (Thursday)
    • Baccalaureate Mass (Thursday evening)
    • Graduation (Saturday)

 

 

 



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