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Transcript
Second Semester Physics Review 1. The frequency of oscillation f of a mass m suspended from a vertical spring is given by where k is the spring constant. Which one of the following plots would produce a straight-line graph? 2. A mass is suspended from a vertical spring. It is set into oscillation by pulling it down a short distance and then releasing it. At which one of the labeled points, during the subsequent motion, will the acceleration be zero? 3. The top graph below represents the variation of displacement with time for a particle executing SHM. Which curve in the represents the variation of velocity with time for the same particle? a 1 b 2 c 3 d 4 e none of these 1. The time for one wave to pass a point in space is called its a) frequency b) period c) wavelength d) amplitude 2. A unit for frequency is a) s-1 b) m c) s d) m-1 e) cycles/m 3. The period of an ocean wave is 5 seconds. What is the wave's frequency? a) 5 Hz b) 1.0 Hz c) 0.2 Hz d) 0.1 Hz 4. An ocean wave has a frequency of 4 hertz and a wavelength of 4.3 m. What is the wave's speed? a) 1.75 m/s b) 17.2 m/s c) 0.93 m/s d) 0.05 m/s 6. 7. 8. 9. 10. When a wave pulse on a high density string hits a boundary with a low density string it will a) partially reflect inverted and also carry on at a higher speed and longer wavelength b) partially reflect upright and also carry on at a higher speed and longer wavelength c) partially reflect upright and also carry on at a lower speed and shorter wavelength d) partially reflect inverted and also carry on at a lower speed and shorter wavelength e) not change at all 11. 12. 12. 13. 14. 15. Sound waves in air are a series of: a) high and low pressure regions c) periodic condensations and refractions b) periodic disturbances d) all of the above e) a and b 16. A bugle can be thought of as an ____________ tube. If the bugle were straightened out, it would be 265cm long. If the speed of sound is 343 m/s find the lowest frequency that is resonant in the bugle? a) 0.32 Hz b) 0.65 Hz c) 32.3 Hz d) 64.7 Hz e) 129.4 Hz 17. Sound analysis of a note played on a musical instrument show two consecutive overtones at 786 Hz and 1310 Hz. The note played is has a fundamental frequency of: a) 131 Hz b) 262 Hz c) 524 Hz d) 786 Hz e) other 18. If two sounds at 100 Hz and 1000 Hz are perceived with the same loudness: a) the 100 Hz sound must be at a higher intensity level b) the 1000 Hz sound must be at a higher intensity level c) they are both at the same intensity level 19. Compared to a magnitude 7.5 earthquake, a magnitude 8.5 earthquake carries more energy by a factor of: a) 1 b) 10 c) 30 d) 2.8x108 e) 3.5x1012 20. The property of sound called intensity is: a) proportional to the rate at which sound energy flows through an area normal to the direction of wave propagation. b) inversely proportional to the rate at which sound energy flows through an area normal to the direction of propagation. c) proportional to the period of the sound wave. d) proportional to the frequency of a sound wave. e) proportional to the amplitude of a wound wave. 21. Compared to a spherical wave at distance r from a source, a wave at 1/4 r will have an intensity: a) 4x’s more b) 16x’s more c) 4x’s less d) 16x’s less e) other answer 22. A police car siren is 1500 Hz when at rest. If the car moves away from an observer at 30 m/s, what frequency does the observer detect? a) 1644 Hz b) 1379 Hz c) 1500 Hz d) 1200 Hz e) other 23. If the police car traveling at 40 m/s chases a speeder traveling at 30 m/s, what frequency will the speeder hear? a) 1226 Hz b) 1461 Hz c) 1550 Hz d) 1847 Hz e) other 24. The shock wave produced by an aircraft moving through air is shown below. Determine the mach # of the plane. a 1 b 1.5 c 2 d 2.5 e 3 25. For the last question, the half-cone angle of the shock wave is a) 0.4110 b) 23.60 c) 35.70 d) 43.20 e) 68.20 26. How much energy does a photon of red light that has a wavelength of 640 nm contain? a) 3.2 eV b) 2.5 eV c) 1.9 eV d) 1.3 eV 27. Compared to the average speed of light in water, the average speed of light in air is: a) less b) faster c) the same 28. Dispersion of light into its many component colors in glass is due to: a) the difference in speed of each color in a vacuum b) natural resonance of glass c) the angle at which the light enters d) internal reflection within the glass 29. Diffuse reflection occurs when the elevation of the surface is: a) b) /2 c) /4 d) /8 30. The image in a plane mirror is: a) virtual , reversed b) virtual, right way c) real, reversed d) real, right way 31. If an object is placed between 2F and F in front of a concave mirror the image will be: a) bigger, inverted b) smaller, inverted c) bigger, right way d) smaller, right way e) same 32. A 4.0 cm high candle is placed 10.0 cm from a concave mirror having a focal length of 16.0 cm. What is the location of the image? a) -0.037 cm b) 0.163 cm c) –26.7 cm d) 6.15 cm e) other 33. The refractive index of diamond is 2.42. If light enters a diamond slab at 23 O to the normal what is its angle (relative to the normal) in the diamond? a) 9.29O b) 0.105O c) 6.03O d) 0.95O e) other answer 34. In her bedroom, Mia has a fiber optic light that glows as hundreds of fiber optic cables are lit from below. If each fiber optic cable has an index of refraction of 1.48, at what critical angle must light enter the cable in order for total internal reflection to occur? a) 0.67O b) 1.48O c) 21.3O d) 42.5O e) other angle 35. To correct their vision, far-sighted people must use a) convex lenses b) concave lenses c) prisms d) reflectors 36. An object is 10.4 cm tall, and 4.8 cm in front of a diverging lens. The image is 4 cm from the lens. How tall is the image? a) 12.5 cm b) 8.7 cm c) 5.4 cm d) 1.8 cm 37. If the frequency of light incident on a single slit is increased the distance between the fringes will: a) be greater because of more diffraction from the slit b) be greater because of less diffraction from the slit c) be less because of more diffraction from the slit d) be less because of less diffraction from the slit 38. Who came up with the idea of electric charge? a) Coulomb b) Volta c) Ampere d) Faraday 39. 40. e) Ohm f) Franklin 41. An uncharged sphere on a glass rod is placed near a negatively charged Van de Graaf generator. A student then quickly touches the sphere for a second. After the sphere is moved away from generator what charge remains on it? a) positive b) negative c) neutral 42. A +6C charge is placed 2cm from a - 4C charge. The force on the - 4C charged particle due to the +6C particle is: a) 0.108 N b) 0.054 N c) 10.8 N d) 540 N 43. A small positively charged object near a positively charged sphere is moved one third as far away. The electric force on the small object: a) b) c) d) e) 44. 45. increases by a factor of 3 increases by a factor of 9 decreases by a factor of 3 decreases by a factor of 9 stays the same 46. 47. At what distance from a point charge of 8.0C would the electric potential be 4.2x104 V? a) 0.58 m b) 0.76 m c) 1.7 m d) 2.9 m e) other 48. A charge of 12 C passes through an electroplating apparatus in 2 min. What is the average current? a) 0.1 A 49. b) 6 A c) 24 A d) 0.2 A 50. 51. A 150 W light bulb running on 110 V draws how much current? a) 0.73 A b) 1.4 A c) 2.0 A d) 15 A 52. How much does it cost to operate a 25 W soldering iron for 8 hrs, if energy costs $0.08/kWhr? a) $1.50 53. b) $0.25 c) $0.16 d) $0.016 54. A 3 resistor is connected in parallel with a 6 resistor. This combination is connected in series with a 4 resistor. The resistors are connected to a 12V battery. How much power is dissipated in the 4 resistor? a) 5.3 W b) 12 W c) 2.7 W d) 16 W e) other 55. Who came up with the theory that led to the development of the electric motor? a) Faraday b) Henry c) Edison d) Tesla e) Oersted 56. What direction is the current carrying wire deflected when positioned in the magnetic field as shown? XXXX XXXX a) into the page XXXX XXXX b) out of the page XXXX XXXX c) left XXXX XXXX d) right XXXX XXXX e) up f) down 57. 58. 59. A household transformer is used to take 120 V down to 6 V. What is the ratio of turns on the primary to turns on the secondary? a) 20:1 60. b) 1:20 c) can’t tell with information given 61. 62. 63. 64. 65. 66. 67. 68. 69. 70. 71. 72. The initial activity of a radioactive sample is 120 Bq. If after 24 h the activity is measured to be 15 Bq, the half-life of the sample is.. a) 4 h b) 6 h c) 8h d) 10 h e) other 73. 74. The mass of a gold nucleus (19779 Au) is 196.924 u. How much mass is lost when the individual nucleons come together to make the gold nucleus? (mp = 1.007276 u, mp = 1.008665 u) a) 1.67 u b) 2.34 u c) 3.42 u d) 5.18 u e) other 75. In the last question what is the binding energy per nucleon for gold-197? (1u = 931.5 MeV) a) 1.05 MeV b) 5.34 MeV c) 7.91 MeV d) 8.76 MeV e) other 76. Ernest Rutherford, in 1909 studied the transmutation of nitrogen, whereby an alpha particle colliding with a nitrogen nucleus produces this element and hydrogen (a proton) as shown below. 14 7N + 4 2 ? + 1 1 P What is the unknown element produced? a) 19 10 Ne b) 17 8 O c) 12 6 C d) 16 8 O e) other 77. 78. In a PWR, water acts as both the coolant and the moderator. Water is a good moderator because.. a) b) c) d) e) it can absorb fast neutrons efficiently it has a high specific heat capacity it has a surplus of neutrons each hydrogen atom in a water molecule have about the same mass as a neutron water molecules are much more massive than neutrons Accelerated Physics Second Semester Review Answers SHM 1. B 1. B 2. A 3. C 4. B 5. B 6. B 7. A 8. A 9. C 10. B 11. C 12. D 13. A 14. B 15. E 16. C 17. B 18. A 19. C 20. A 21. B 22. B 23. C 24. D 25. B 26. C 27. B 28. B 29. D 30. A 31. A 32. C 33. A 34. D 35. A 36. B 37. D 38. F 39. C 2. C 3. C 40. 41. 42. 43. 44. 45. 46. 47. 48. 49. 50. 51. 52. 53. 54. 55. 56. 57. 58. 59. 60. 61. 62. 63. 64. 65. 66. 67. 68. 69. 70. 71. 72. 73. 74. 75. 76. 77. 78. B A D B C D A C A A B B D C A E C B B A A B B C C A B C B D C D C D A C B C D