| Answers to Check Your Understanding |

CHAPTER 1
CYU 1: | b and d
CYU 2: |

a. | 11 m
b. | 5 m

CYU 3: |

a. | Ax is −, Ay is +
b. | Bx is +, By is −
c. | Rx is + , Ry is +

CYU 4: | a

CHAPTER 2
CYU 1: | His average velocity is 2.7 m/s, due east. His average speed is 8.0 m/s.
CYU 2: | c
CYU 3: | 1.73
CYU 4: | b

CHAPTER 3
CYU 1: | b
CYU 2: | c
CYU 3: | a and c
CYU 4: |

1. | +70 m/s
2. | +30 m/s
3. | +40 m/s
4. | −60 m/s

CHAPTER 4
CYU 1: | c
CYU 2: | d
CYU 3: | 43°
CYU 4: | a
CYU 5: | a

CHAPTER 5
CYU 1: |

a. | The velocity is due south, and the acceleration is due west.
b. | The velocity is due west, and the acceleration is due north.

CYU 2: |

a. | 4r
b. | 4r

CYU 3: | less than
CYU 4: |

a. | less than
b. | equal to

CHAPTER 6
CYU 1: | b
CYU 2: | false
CYU 3: | b and d
CYU 4: | c

CHAPTER 7
CYU 1: | b
CYU 2: | a
CYU 3: | d
CYU 4: | above the halfway point

CHAPTER 8
CYU 1: | B, C, A
CYU 2: | 1.0 rev/s
CYU 3: | 0.30 m
CYU 4: | 8.0 m/s2

CHAPTER 9
CYU 1: | 0°, 45°, 90°
CYU 2: |

a. | C
b. | A
c. | B

CYU 3: | A, B, C
CYU 4: |

a. | Both have the same translational speed.
b. | Both have the same translational speed.

CHAPTER 10
CYU 1: | 180 N/m
CYU 2: | II
CYU 3: | b, c, a
CYU 4: | The rod with the square cross section is longer.

CHAPTER 11
CYU 1: | increase, decrease, remain constant
CYU 2: | c
CYU 3: | d
CYU 4: | e

CHAPTER 12
CYU 1: | 178 °X
CYU 2: | b and d
CYU 3: | c, b, d, a
CYU 4: | c, a, b

CHAPTER 13
CYU 1: | c
CYU 2: | b

CHAPTER 14
CYU 1: | 66.4%
CYU 2: | Xenon has the greatest and argon the smallest temperature.
CYU 3: |
CYU 4: | c, a, b

CHAPTER 15
CYU 1: | d
CYU 2: | b
CYU 3: | c
CYU 4: | d

CHAPTER 16
CYU 1: | a
CYU 2: | CO and N2
CYU 3: |

a. |
b. | 2

CYU 4: |

a. | The truck driver is driving faster.
b. | minus sign in both places

CHAPTER 17
CYU 1: |

a. | 0 cm
b. | −2 cm
c. | +2 cm

CYU 2: | 387 Hz
CYU 3: |

a. | 4
b. | 3
c. | node
d. | 110 Hz

CYU 4: |

a. | antinode
b. | node
c. |
d. | lowered

CHAPTER 18
CYU 1: | b and e
CYU 2: | c, a, b
CYU 3: |

a. | corner C
b. | negative
c. | greater

CYU 4: | The fluxes in (a) and (b) are the same.

CHAPTER 19
CYU 1: |

a. | Yes.
b. | No.
c. | Yes.
d. | Yes.

CYU 2: | b, c, a and d (a tie)
CYU 3: |

a. | +2.0 V
b. | 0 V
c. | +2.0 V

CYU 4: |

a. | decreases
b. | increases
c. | increases
d. | increases

CHAPTER 20
CYU 1: | B, D, and E
CYU 2: | c
CYU 3: | 3R, , and
CYU 4: | I1 + I3 = I2 3.0 V + 7.0 V + I3R3 = I1R1 5.0 V = I3R3 + 7.0 V + I2R2
CYU 5: | 0.80 s

CHAPTER 21
CYU 1: | d
CYU 2: | 1, 3, 2
CYU 3: | B and D (a tie), A, C
CYU 4: | A, D, C, B

CHAPTER 22
CYU 1: | d
CYU 2: | a
CYU 3: | The field points away from you and is decreasing, or the field points toward you and is increasing.
CYU 4: | the one-turn coil
CYU 5: | b and d

CHAPTER 23
CYU 1: | The ratio increases by a factor of 3.
CYU 2: |

a. | inductor
b. | resistor

CYU 3: | less than
CYU 4: |

a. | remains the same
b. | decreases

CHAPTER 24
CYU 1: | e
CYU 2: | d
CYU 3: | B, A, C
CYU 4: | unpolarized—c polarized—b

CHAPTER 25
CYU 1: | 55°
CYU 2: | finside = +0.30 m foutside = −0.30 m
CYU 3: | The magnitudes of the image distance and the image height both become larger.
CYU 4: | A, D, and E

CHAPTER 26
CYU 1: | B
CYU 2: | c
CYU 3: | A
CYU 4: | converging lens,
CYU 5: | 0.042 rad

CHAPTER 27
CYU 1: |

a. | constructive
b. | destructive
c. | destructive

CYU 2: |

a. | d1 and
b. | d2 and λ1

CYU 3: |

a. | A and C
b. | B

CYU 4: |

a. | broaden
b. | contract

CYU 5: |

a. | the maximum that is closer to the central maximum
b. | away from the central maximum

CHAPTER 28
CYU 1: | d
CYU 2: | b
CYU 3: | greatest—c smallest—b
CYU 4: | c

CHAPTER 29
CYU 1: | a
CYU 2: | less than
CYU 3: | b

CHAPTER 30
CYU 1: | d
CYU 2: |

a. | Yes.
b. | No.

CYU 3: | 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6
CYU 4: | c

CHAPTER 31
CYU 1: | c, d
CYU 2: | c
CYU 3: | d
CYU 4: | b

CHAPTER 32
CYU 1: | neutrons, particles, rays
CYU 2: | c
CYU 3: | d
CYU 4: | b and d

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