A body cell of 1.0×10−5-m radius absorbs 4.2×10−14 J of X-ray radiation.
Part A: If the energy needed to produce one positively charged ion is 100 eV, how many positive ions are produced in the cell?
Part B: How many ions are formed in the 3.0 × 10−6-m-radius nucleus of that cell (the place where the genetic information is stored)?



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