1.The isotope Tc", which has a hali-ife of 6.0 h, is used in medical diagnosis procedures such as bone scans. If a sample has an activity of 32 mCi when initially prepared, what is its activity 9 h later when it is used? OA 2er0, since more than 2 halt-ives have elapsed OB. less han 16 ma but more than 8 ma OC 16 mo OD less than 8 ma 2.What turned out to be a flaw in Galilean relativity corrected by special relativity? A. It was inconsistent with the result that the speed of light is the same in all inertial reference frames. B. It broke down, providing inaccurate predictions, at very small distances. C. the presence of the speed of light, c, in the equations for electromagnetism| D. the dual particle/wave nature of light 3.What fraction of a radioactive sample has decayed after two half-lives have elapsed? A. 1/8 В. 3/4 C. 7/8 D. none 4.Planck conceived of what he considered a mathematical trick which happened to predict the correct results for black body radiation. What assumptions were at the base of his "trick?" O A The energy of an oscllator is dependent upon the index of refraction of the material it i located in. Also, black body problems are best treated as quantum problems. OB The energy of an oscllator can only have discrete values, and thus allows the use of dassical physics. The energy of an osalator is dependent upon the index of refraction of the material it islocated in. Also, oscilators emit or absorb energy when making a transition from one quantum state to another. The energy of an oscilator can anly have discrete values. Also, oscilators emit or absorb energy when making a transtion from one energy state to another. OD.

1.The isotope Tc", which has a hali-ife of 6.0 h, is used in medical diagnosis procedures such as bone scans. If a sample has an activity of 32 mCi when initially prepared, what is its activity 9 h later when it is used? OA 2er0, since more than 2 halt-ives have elapsed OB. less han 16 ma but more than 8 ma OC 16 mo OD less than 8 ma 2.What turned out to be a flaw in Galilean relativity corrected by special relativity? A. It was inconsistent with the result that the speed of light is the same in all inertial reference frames. B. It broke down, providing inaccurate predictions, at very small distances. C. the presence of the speed of light, c, in the equations for electromagnetism| D. the dual particle/wave nature of light 3.What fraction of a radioactive sample has decayed after two half-lives have elapsed? A. 1/8 В. 3/4 C. 7/8 D. none 4.Planck conceived of what he considered a mathematical trick which happened to predict the correct results for black body radiation. What assumptions were at the base of his "trick?" O A The energy of an oscllator is dependent upon the index of refraction of the material it i located in. Also, black body problems are best treated as quantum problems. OB The energy of an oscllator can only have discrete values, and thus allows the use of dassical physics. The energy of an osalator is dependent upon the index of refraction of the material it islocated in. Also, oscilators emit or absorb energy when making a transition from one quantum state to another. The energy of an oscilator can anly have discrete values. Also, oscilators emit or absorb energy when making a transtion from one energy state to another. OD.