College Physics Unit 7 Modern Physics Presentations This project is 50% of your Final Exam for Second Semester Mrs. Ashley Name ______________________________________ #1 Modern Physics Assignment: Due May 26 Grant Please prepare a lesson to teach pages 726-737 including exercise C Be sure to explain the equation 26-1a and 26-1b and 26-2 Here is the Problem you are to have students do: #1. What will be the mean lifetime of a muon as measured in the laboratory if it is traveling at v = 0.60 c = 1.80 X 10-6 m/s with respect to the laboratory? Its mean lifetime at rest is 2.20 s = 2.20 X 10-6 s. How far does a muon travel in the laboratory on average, before decaying? #2 Modern Physics Assignment: Due May 26 Ryan Please prepare a lesson to teach pages 737 (Space travel) - 741 (whole page) Be sure to explain 26-3a and 26-3b; #2. Escape velocity from the Earth is 40,000 km/m. What would be the percent decrease in length of a 95.2 meter long spacecraft traveling at that speed? #3 Modern Physics Assignment: Due May 26 Molly Please prepare a lesson to teach pages 742-747 Be sure to explain: 26-4 and 26-5; 26-6a'; 26-6b; 26-7a and 26-7b and 26-8 #3. Calculate the kinetic energy and momentum of a proton traveling 2.60 X 108 m/s #4 Modern Physics Assignment: Due May 26 Brad Please prepare a lesson to teach pages 754-758 (stop at 27-3) Be sure to explain 27-2 and 27-3 #4. How hot is a metal being welded if it radiates most strongly at 440 nm? #5 Modern Physics Assignment: Due May 28 Gianna Please prepare a lesson to teach pages 758 (start at 27-3)-763 (stop at 27-5) Be sure to explain 27-4; 27-5a; 27-5b; 27-6 #5. What is the maximum kinetic energy of electrons ejected from barium (Wo =2.48 eV) when illuminated by white light, = 400 to 750 nm? #6 Modern Physics Assignment: Due May 28 Christina Please prepare a lesson to teach pages 763 (start at 27-5)-766 (stop at 27-8) Be sure to explain: 27-7 #6. An electron and a positron each moving at 1.0 X 105 m/s collision head on, disappear, and produce two photons, each with the same energy and momentum moving in opposite directions. What is the energy and momentum of each photon? #7 Modern Physics Assignment: Due May 28 Kevin Please prepare a lesson to teach pages 766 (start at 27-8)-773 (stop at 27-12) Be sure to explain: 27-8; 27-9 #7. An Electron has a de Broglie wavelength = 5.0 X 10-10 m. What is its momentum? What is its speed? What voltage was needed to accelerate it to this speed? #8 Modern Physics Assignment: Due May 29 Joe Please prepare a lesson to teach pages 773 (start at 27-12)-779. Be sure to explain: 27-10; 27-11; 27-12; 27-14; 27-15b #8. How much energy is needed to ionize a hydrogen atom in the n = 2 state? #9 Modern Physics Assignment: Due May 29 J.T. Please prepare a lesson to teach pages 786-793. Be sure to explain:28-1; 28-2; #9. An electron remains in an excited state of an atom for typically 10-8 s. What is the minimum uncertainty in the energy of the state (in eV)? #10 Modern Physics Assignment: Due May 29 Mike Please prepare a lesson to teach pages 794-802 (stop at 28-10). Be sure to explain: 28-3; 28-4 #10. Suppose a certain hydrogen atom has I = 4. What are the possible values for n, m1, m2 ?