Answer Happy

I need help with 3-6 please!
Dose calculation and radiation safety ✔✔3456| Constants and Conversion Factors I for 137 Cs=0.33 Rm²/Ci hr C=0.00873 J/kg R Mass attenuation coefficient of water = 0.0326 cm²/g Mass attenuation coefficient of air = 0.0293 cm²/g Attenuation coefficient of lead = 1.23 cm¹ For x-rays, 1Gy= 1Sv 1) What is the total exposure at a point 1 m from a 100 mCi source of 137 Cs after 2 hours? 0.065 R Submit 2) Assuming a person is made entirely of water, what is the dose to the person at the same distance from the source as above? 0.00065 Gy Submit You currently have 16 submissions for this question. Only 20 submission are allowed. You can make 4 more submissions for this question. 3) If this person was shielded by 2 cm of lead at a distance of 2m from the source, what will the new dose to the person be? 2.53e-4 Gy Submit Help 4) If the person is a member of the public and was exposed continuously to the dose in Question 3, how long will it take before this person reaches his yearly limit? Annual limit of exposure for the public is 1mSv. For x-rays 1 Gy=1 Sv. hours Submit Help 5) What is the time needed to reach the limit if there is no lead? hours Submit 6) What is the time needed if there is lead, but a much stronger source of 5Ci? hours Submit Dose calculation and radiation safety