1. ( 2 pts) What is the activity of 1 milligram of pure C11 ? Hint: you will need to find the decay constant, , or the half-life of C11. Half-life and decay constant are related by: =t1/2ln(2) 2. (2 pts) Assume a person receives a 0.04Gy(4rad) absorbed dose from a 6MeV photon beam and a 0.01Gy(1rad ) absorbed dose from a 190MeV proton beam. What is the dose equivalent for this exposure? [Note: I believe there is an error in Table 26-3 in the Anna reading. Per the NRC (https://www.nrc.gov/reading-rm/doc-collections/cfr/parto20/part0201004.html)]: 3. (1 pt) A radon test in a basement of the house you just bought is 170Bq/m3. What is this test result equal to in pCi/L? Do you need to implement controls to reduce exposure