Physics- Nuclear and Modern Physics Test Questions & Answers

Physics- Nuclear and Modern Physics Test Questions & Answers _______ is the term for the measurement 10-9 m. - CORRECT ANSWER- nanometer 1 2 3 4 5 6 7 8 9 10 Chemotherapy is a cancer treatment that uses drugs to kill cancer cells. However, it is problematic, because the drugs also kill every healthy cell that they contact. How could nanotechnology best be used to improve the treatment of cancer with chemotherapy? A nanometer-size carrier could be designed to bring the chemotherapy drugs only to cancer cells. A nano carbon wire could be designed that would aid in the manufacture of chemotherapy drugs. A quantum dot could be used to watch where the chemotherapy drugs go in the body. Biomaterials could be made that would allow for cell growth within the cancer cells so that they are easier to find. - CORRECT ANSWER- A nanometer-size carrier could be designed to bring the chemotherapy drugs only to cancer cells. A 60-g sample of radioactive isotope is measured after two half-lives have passed. What pair of percentages describes the sample after two half-lives? 50% unchanged and 50% stable 25% unchanged and 75% stable 12.5% unchanged and 87.5% stable 75% unchanged and 25% stable - CORRECT ANSWER- 25% unchanged and 75% stable A doctor thinks a patient has an intussusception, in which a part of the intestine slides inside itself like the parts of a collapsible telescope. Which imaging technique is the doctor most likely to use? Explain. X-ray radiography is most likely because it can make an image of a large area of the body. Sonography is most likely because it has good resolution without radiation. X-ray fluoroscopy is most likely because it can monitor the movement of material in real time. A CT scan is most likely because it can form a three-dimensional image of the intestines. - CORRECT ANSWER- Sonography is most likely because it has good resolution without radiation