Physics Final Review

1. Physics Final Review

2. In the absence of air resistance, how would the acceleration of a 250g cell phone and the acceleration of a 25g pebble differ if the objects were dropped from the same height? • a. They would not differ; they would be the same. • b. The rock would accelerate twice as fast as the book. • c. The book would accelerate twice as fast as the rock. • d. The book would accelerate ten times as fast as the rock.

3. When an object is in free fall, the only force acting on it is • a. inertia. • b. gravity. • c. friction. • d. terminal velocity.

4. . What is potential energy? • a. Motion • b. Stored energy • c. Energy yet to be made • d. Energy that has already been used

5. What is kinetic energy? • a. Motion • b. Stored energy • c. Energy yet to be made • d. Energy that has already been used

6. In photosynthesis, which of the following types of energy is used to make new substances? • a. sound energy • b. thermal energy • c. light energy • d. nuclear energy

7. Your body uses the chemical energy in food to make which of the following types of energy? • a. kinetic energy • b. potential energy • c. light energy • d. sound energy

8. A hair dryer changes electrical energy into which of the following types of energy? • a. light energy • b. thermal energy • c. nuclear energy • d. chemical energy

9. After an energy conversion, you end up with the same total amount of energy as the original amount of potential energy. Which of the following laws explains this rule? • a. law of energy changes • b. law of power and energy • c. law of conservation of energy • d. law of potential energy

10. You turn on a lamp and the light bulb becomes warm. Which of the following energy conversions causes this heating • of the light bulb? • a. thermal energy to electrical energy • b. electrical energy to thermal energy • c. light energy to thermal energy • d. electrical energy to light energy

11. When a pitcher throws a softball to a catcher, while the pitcher is holding the ball it has _____ energy, while the • motion of the ball toward the catcher is _____ energy. • a. stored mechanical, mechanical • b. chemical, mechanical • c. electrical, thermal • d. mechanical, chemical

12. When you “shock” yourself by touching a door knob, electrons are transferred to the doorknob. What is this type of • energy transfer? • a. chemical • b. electrical • c. gravitational • d. Nuclear

13. Electrical current will pass most easily through: • a. an insulator. • b. a conductor. • c. a semiconductor.

14. Which of the following statements best describes the difference between series and parallel circuits? • a. Series circuits are battery circuits and parallel circuits are generator circuits. • b. Series circuits have a single path and parallel circuits have two or more paths. • c. Series circuits are used in computers and parallel circuits are used in homes.

15. A closed circuit: • a. is off. • b. is on. • c. has a break in it.

16. Positive electric charges: • a. attract both positive charges and negative charges. • b. repel positive charges and attract negative charges. • c. attract positive charges and repel negative charges.

17. If two light bulbs are in series and you unscrew one of them, the other light bulb will • a. become brighter. • b. become dimmer. • c. turn off. • d. be short circuited.

18. Potential difference is measured in • a. amperes. • b. volts. • c. coulombs. • d. joules.

19. . The rate at which charges move through a conductor is called • a. voltage. • b. resistance. • c. current. • d. electrical potential energy.

20. Which of the following is not a type of electromagnetic wave? • A. sound • B. red light • C. gamma radiation • D. radio waves

21. The material that a wave travels through is called the • A. amplitude • B. medium • C. rarefaction • D. compression

22. As the frequency of a spring wave is increased, the _____________ • A. velocity decreases • B. velocity increases • C. wavelength decreases • D. wavelength increases

23. As you produce a wave on a spring, which of the following quantities are you NOT able to change? • A. amplitude • B. frequency • C. velocity • D. wavelength

24. All waves except ______ waves must travel through a medium. • A. sound • B. light • C. water • D. compressional

25. By counting the number of crests that pass in a given amount of time, a person can calculate the • A. wavelength • B. amplitude • C. velocity • D. frequency

26. When the particles of the medium are displaced parallel to the direction of the propagation of the wave, it is called a ___________. • a. Water wave • b. Ultrasonic wave • c. Transverse wave • d. Longitudinal wave

27. Which of the following is the definition of amplitude a. The maximum displacement from the rest position. b. The total distance traveled by the wave in one full cycle. c. The energy reflected by a fixed medium. d. The lowest frequency that produces a standing wave.

28. What is a transverse wave? • a. The rate with which the amplitude of the wave pulsates. • b. The disturbance of the particles is in the same direction as the movement of the wave. • c. A wave of alternating lower and higher pressure. • d. The particles of the medium that are displaced perpendicular to the direction of the wave.

29. Sound waves are ___________ waves. • A. Transverse • B. ocean • C. salt • D. longitudinal

30. Sound waves from a radio generally travel in which medium? • a. air • b. earth • c. light • d. solid

31. If a transverse wave is moving from right to left, the individual particles in the medium are moving • a. right to left. • b. left to right. • c. up and down. • d. None of the above

32. Waves are often caused by • a. potential energy. • b. mechanical energy. • c. colliding objects. • d. vibrating objects.

33. Use the above graph to answer the following two questions. • 51. On the graph two cycles after B is letter • a. F • b. J • c. D • d. G

34. 52. On the above one-half cycle before D is letter • a. I • b. F • c. K • d. E

35. 53. Which letter in the graph represents the amplitude? • a. A • b. C • c. B • d. D

36. Which letter in the graph represents the wavelength? • a. A • b. C • c. B • d. D

37. Which of the following is a frequency humans cannot hear? • a. 40 Hz • b. 19,000 Hz • c. 1,200 Hz • d. 21,000 Hz

38. When sound travels through air, the air particles ______. • a. vibrate parallel to the direction of wave propagation • b. vibrate but not in any fixed direction • c. vibrate perpendicular to the direction of wave propagation • d. do not vibrate

39. The relation between wave velocity 'v', frequency 'f ', and wavelength 'ג' is ______. • a. v=f/ ג • b. v=f ג • c. v=ג/f • d. v=1/f ג

40. Which of the following is not a characteristic of a musical sound? • Pitch • Wavelength • Quality • Loudness

41. Sound waves do not travel through • solids • liquids • gases • vacuum

42. The speed of sound in medium depends upon • amplitude • frequency • wavelength • properties of the medium

43. Sound waves from a radio generally travel in which medium? • A.air • C.light • B.earth • D.water

44. . Our eyes can detect light only within a range of _____ called visible light. • A.frequencies • C.mediums • B.speeds • D.Periods

45. The speed of a sound wave • A.depends on wavelength. • C.depends on amplitude. • B.depends on the medium. • D.None of the above

46. Longitudinal waves travel quickly in a _____ because the molecules are closely packed and physically bonded together. • A.liquid • C.solid • B.gas • D.None of the above

47. The differences in color in visible light, such as those in a rainbow, are caused by differences in • A.amplitude. • C.medium. • B.speed. • D.frequency.

48. Light waves • A.require a medium. • C.cannot travel through liquids. • B.cannot travel through solids. • D.are electromagnetic waves.

49. Light waves are • A.transverse waves. • C.rotating waves. • B.longitudinal waves. • D.circular waves.

50. The color of light is determined by the _____ of the light waves. • A.medium • C.frequency • B.speed • D.amplitude