A 11,460-year-old archeological specimen has a 14C activity of 6.5×10−2 Bq. What is the carbon mass of the specimen? Express your answer with the appropriate units. ( possible in grams)   Part B .  A 7.0×10−2 kg tumor is treated with a high-energy proton beam. If the equivalent dose delivered to the tumor is 1900 rem, how much energy did the tumor absorb? Express your answer with the appropriate units. ( in J)

Determine the nucleus density (in kg/m3) of the following four isotopes.4He (m = 4.00260325415 u)  = 2.307e17 kg/m^321Ne (m = 20.99384668 u)  = ______ (CANNOT BE 2.99328e17 kg/m^3)186Tl (m = 185.97833 u)  = ________ (CANNOT BE 2.9946e13 kg/m^3)231Pa (m = 231.035884 u)= _____  (CANNOT BE 3.624e-13 kg/m^3)

The isotope of Curium 242Cm has a half-life of 160 days and emits alpha particles with an energy 6.1 MeV. What is the initial power emitted by a sample of 242 Cm with a starting number of No = 10¹8 atoms? Select one: a. 49 mW. O b. 15.6 W. O c. O d. 308 kW. 2.7 W.

The isotope of Curium 242Cm has a half-life of 160 days and emits alpha particles with an energy 6.1MEV. What is the power emitted by a sample of 242Cm with a starting number of No = 1018 atoms after 80 days? Select one: a. 1.46 mW. b. 34.6 mW. c. 975 μΝ. d. 13.8 mW.