Carbon tetrachloride has a drinking water standard with a Maximum Contaminant Limit (MCL) of 0.005 mg/L. Potency factor is 0.13 (mg/kg-day)-1 for oral route. Assuming a 70 kg person drinking 2 L for 70 years, what is the upper-bound cancer risk for an individual?

A. 1 in 10,000
B. 1 in 100,000
C. 2 in 10,000
D. 2 in 100,000

10 kg of co2 is initially contained at 400 kpa and 300 k. the gas constant for carbon dioxide is 189 j/lkg k) and has a specific heat ratio, k, of 1.289. isentropic expansion then occurs until the pressure is 200 kpa. a) determine the initial volume of co2 in m. b) determine the final temperature in k. c) determine the work done by the system during the expansion kl.