Your group is a radiology department in a hospital. Two patients in your waiting room are arguing about who “got more radiation” in their cancer treatments. Patient A received 2.0 Gy of radiation, while Patient B received 1.0 Gy. Patient A is claiming that he had twice as much energy delivered to his body based on these numbers. Upon further investigation, it is determined that Patient A received radiation from fast neutrons, RBE 10, affecting 22 g of tissue. Patient B received alpha particles, RBE 18, affecting 30 g of tissue. (a) Who “got more radiation” in terms of biological effectiveness for radiation damage and (b) by what factor?
Black Gold Ltd is a Japan-based multinational company engaged in the production of thermal power. This electricity is purchased by many manufacturing companies in Japan. Black Gold started its operations in 2004. In order to cut down cost of raw material (coal), the company has also invested in coal fields in South Africa. The extract from Black Gold’s financial statements is provided. Currently, Black Gold is considering purchase of a coal mine in Indonesia. For this project, the company needs a loan of $5 billion. The project will run for 20 years. End-value of the project (scrap value) is zero
March 22, 2015
1:06 pm
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