Teaching Modern Physics - QuarkNet - Fermilab

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The History of the Electron Worksheet - Key Conceptual <strong>Physics</strong> Directions: Please answer each question using a complete sentence. 1. Describe a cathode ray. Look for the word “electron” or phrase “stream of charged particles.” 2. A fast moving electron enters a magnetic field. Describe what happens to the electron during this interaction. Use the words: magnetic field, perpendicular, path and force. As the electron moves perpendicular to the constant magnetic field direction, a constant magnetic force causes the electron’s path to bend. 3. Explain Millikan’s oil drop experiment. Use at least three sentences and include the words: charge, force, gravity, electric. Charged oil drops are made to fall due to the force of gravity within a variable electric field. The force of gravity that varies with the mass of the oil drop is made to fall within an electric field. If the electric force acting on an oil drop is made to equal the gravitational force on the oil drop, then the charge mass ratio can be determined. 4. In an early set of experiments (1911), Millikan observed that the following measured charges, among others, appeared at different times on a single drop of oil. Each of these drops of oil had a different mass. What value of elementary charge can be deduced from these data? a. 6.563 x 10 -19 C b. 11.5 x 10 -19 C c. 13.13 x 10 -19 C d. 22.89 x 10 -19 C e. 26.13 x 10 -19 C Divide each by 2 and 1.6x10 -19 C should emerge. What does this elementary charge represent? The charge on an electron 5. Draw a force diagram of an electron falling in the Millikan experiment. Electric force vector up should equal gravitational force vector down. 31
6. What forces were applied on the cathode ray in J. J. Thompson’s experiment? Electric force, magnetic force, (gravitational force very weak) Draw a force diagram for the electron in Thompson’s experiment when the electron is traveling in a straight path. Electric force on electron equal and opposite to magnetic force on electron 32
Page 1 and 2: Materials for Teaching Modern Physi
Page 3 and 4: Which activities did you use in you
Page 5 and 6: Materials for Teaching Modern Physi
Page 7 and 8: QuarkNet is a nationwide program th
Page 9 and 10: Radioactivity PowerPoint Presentati
Page 11 and 12: Problems & Worksheets * This activi
Page 13 and 14: The Cloud Chamber: In the Nobel Pri
Page 15 and 16: Instructions for teacher to give to
Page 18 and 19: Teacher’s Key Constant Velocity P
Page 20: Sample Problem: Free Fall and Proje
Page 23 and 24: 3. Cindy drops a cherry pit out the
Page 25 and 26: 2. Running at 2 m/s, Chris, the 50-
Page 27 and 28: 3. A 55-kg swimmer is standing on a
Page 29 and 30: Analysis to prove that momentum was
Page 32 and 33: Teacher’s Key Circular Motion Pro
Page 34 and 35: Student Worksheet Constant Accelera
Page 36 and 37: Teacher’s Key Constant Accelerati
Page 38: The Electron 1. What is the value o
Page 41 and 42: 5. A negatively charged oil drop we
Page 46 and 47: Student Worksheet Motion of Charged
Page 48: Particle Quiz 2 Answer each questio
Page 51 and 52: . What is the direction of the magn
Page 53 and 54: High V The Three Experiments in One
Page 55 and 56: For path B… The cathode ray inter
Page 57 and 58: In his experiment, Millikan tried t
Page 60 and 61: Notes on the Electron PowerPoint Pr
Page 62 and 63: Student Worksheet Index of Refracti
Page 64 and 65: Teacher’s Key Index of Refraction
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Page 68 and 69: Student Worksheet WARP SPEED Step 1
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Page 74: Teacher’s Notes The Half-Life of
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4a. Can a person, in principle, tra
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4. In a high-energy collision betwe
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Modern Physics The Ultraviolet Cata
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By the way, the y-axis of these gra
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5. OK, so that’s real data from r
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. Sketch a graph of this equation:
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4. Calculate the wavelength of the
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5. An air rifle is used to shoot 1-
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4. The work function for potassium
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6. Describe the quantum-mechanical
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Draw Geiger, Marsden, and Rutherfor
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Explain why Balmer/Rydbergh’s for
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10. Describe how particle physics a
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Particle Acceleration (Principles)
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Electric Field and Acceleration +
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Multistage Accelerators (LINAC) 1 2
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Particle Accelerators Why were they
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Cyclotrons are constructed as two
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QUIZ ON PARTICLE ACCELERATORS 1. De
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There are 12 elementary particles t
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6. What magnetic field intensity is
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And finally, we need to remember sp
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Z Boson Mass Reconstruction for DØ
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1 Z Boson Mass Reconstruction for D
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1 Z Boson Mass Reconstruction for D
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3D Z Boson Mass Reconstruction Answ
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7. J. J. Thompson applied a net for
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d.) energy / a silicon detector and
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1) A 2) E 3) E 4) B 5) B 6) B 7) C
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16. What are the three particles th
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16. What are the three particles th
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Anticharm ( c ) Antimatter Quark Ch
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Gluon Gauge boson Force carrier: St
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3. -1 charge 4. Positron 4. Antimuo
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Standard Model Review - Answer Key
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5. Now draw the p vectors of p + an
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5. Now draw the p vectors of p + an
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Newton’s Universal Law of Gravita
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II. Intended Activities and Approxi
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All questions from project written
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periodicals and newsletters. The co
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Fermilab’s Accelerators This is a
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A Game for Building a Detector http
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us. An alternate “radiation” so
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Day 4: 1. Question of the Day: A ha
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Teacher Resources: 1. Standard Mode
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Teaching Modern Physics - QuarkNet - Fermilab

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