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14 CHAPTER 1 Introduction to the Imaging Sciences REVIEW QUESTIONS-contd 8. X-ray exams of the lower abdomen and pelvis of women in reproductive years should be limited to: a. the time before menstruation. b. the 10 days prior to the onset of menstruation c. the 10 days following the onset of menstruation. d. 15 days before or after the onset of menstruation. 5. Which of the following is that radiation intensity that will produce 2.08 X 10° ion pairs in I cm of air? a. R b. Rad c. Rem d. Ci 6. What is the work done if 35 N of force is applied to move 9. What is the power used if 2000 J of work is applied for 5 seconds? a. 400 W b. 10,000 W c. 2005 W d. 1995 W a patient 0.5 m? a. 35.5J b. 34.5 J c. 17.5J d. 70J 7. The curie is an expression of 10. What is the velocity of a car if it travels 1000 meters in a. quality of radioactive material. b. intensity of radioactive material. 4 seconds? a. 1004 m/s c. absorption of radioactive material. b. 250 m/s c. 1996 m/s d. 4000 m/s d. quantity of radioactive material.

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