Difference between revisions of "Giancoli Physics (5th ed) Chapter 30"

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(37. The decay constant of a given nucleus is 5.4 x 10<sup>-3</sup> s<sup>-1</sup>. What is its half-life)
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===44. 55-Cs-124 has a half life of 30.8 s. (a) if we have 7.8 micrograms initially, how many nuclei are present?  (b) How many are present 2.0 min later? (c) What is the activity after this time? (d) After how much time will the activity drop to less than 1 per second?===
 
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Revision as of 13:33, 1 March 2009

Contents

Problems

1. Question

3727 MeV/c2

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2. Question

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3. Question

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4. Question

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5. Question

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6. Question

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7. Question

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8. Question

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9. Question

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10. Question

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11. Question

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12. Question

2.22 MeV

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13. Question

7.48 MeV

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14. Question

32.0 MeV
5.33 MeV

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15. Question

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16. Question

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17. Question

(a) 12.1 MeV
(b) 15.7 MeV
repulsive electric force

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18. Question

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19. Question

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20. Question

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21. Question

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22. Question

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23. Question

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24. Question

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25. Question

228/90Th
228.02883 u

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26. Question

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27. Question

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28. Question

6.12 MeV
0.27 meV

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29. Question

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30. Question

5.41 mEv

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31. Question

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32. Question

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33. Question

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34. Question

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35. Question

3.0 h

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36. Question

4.91 x 10-18 s-1

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37. The decay constant of a given nucleus is 5.4 x 10-3 s-1. What is its half-life

T1/2 = ln(2)/lambda = ln(2)/5.4 x 10-3 = 128.4 sec, or 2.1 minutes.

2.1 min

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38. Question

1.6 x 109 decays/s

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39. Question

0.0625

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40. Question

5.60 x 1019 nuclei

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41. Question

(a) 0.0625
(b) 0.0442

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42. Question

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43. Question

(a) 2.44 X 1012 decays/s
(b) 2.43 X 1012 decays/s
(c) 4.48 X 105 decays/s

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44. 55-Cs-124 has a half life of 30.8 s. (a) if we have 7.8 micrograms initially, how many nuclei are present? (b) How many are present 2.0 min later? (c) What is the activity after this time? (d) After how much time will the activity drop to less than 1 per second?

Solution goes here

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45. Question

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46. Question

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47. Question

(a) 1.38 x 10-13 s-1
(b) 5.387 x 108 decays/min

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48. Question

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49. Question

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50. Question

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51. Question

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52. Question

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53. Question

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54. Question

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55. Question

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56. Question

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57. Question

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58. Question

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59. Question

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60. Question

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61. Question

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62. Question

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63. Question

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64. Question

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65. Question

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66. Question

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67. Question

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68. Question

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69. Question

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70. Question

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71. Question

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72. Question

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73. Question

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74. Question

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75. Question

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76. Question

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77. Question

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78. Question

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79. Question

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80. Question

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81. Question

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82. Question

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83. Question

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84. Question

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85. Question

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86. Question

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87. Question

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88. Question

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89. Question

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90. Question

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91. Question

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92. Question

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93. Question

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94. Question

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95. Question

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96. Question

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97. Question

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98. Question

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99. Question

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100. Question

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