30.65 Ground beef may be irradiated with high-energy electrons from a linear acc

Question

30.65 Ground beef may be irradiated with high-energy electrons from a linear accelerator to kill pathogens. In a standard treatment, 1.7kg of beef receives 4.3 kGy of radiation in 42s . Part A How much energy is deposited in the beef? Part B What is the average rate (in W) of energy deposition in the beef? Part C Estimate the temperature increase of the beef due to this procedure. The specific heat of beef is approximately 0.74 of that of water. 30.64 About 12% of your body mass is carbon; some of this is radioactive 14^C, a beta-emitter. If you absorb 100% of the 49 keV energy of each 14^C decay, what dose equivalent in Sv do you receive each year from the 14^C in your body? (inlcude units) 30.65 Ground beef may be irradiated with high-energy electrons from a linear accelerator to kill pathogens. In a standard treatment, 1.7kg of beef receives 4.3 kGy of radiation in 42s . Part A How much energy is deposited in the beef? Part B What is the average rate (in W) of energy deposition in the beef? Part C Estimate the temperature increase of the beef due to this procedure. The specific heat of beef is approximately 0.74 of that of water. 30.64 About 12% of your body mass is carbon; some of this is radioactive 14^C, a beta-emitter. If you absorb 100% of the 49 keV energy of each 14^C decay, what dose equivalent in Sv do you receive each year from the 14^C in your body? (inlcude units) Part A How much energy is deposited in the beef? Part B What is the average rate (in W) of energy deposition in the beef? Part C Estimate the temperature increase of the beef due to this procedure. The specific heat of beef is approximately 0.74 of that of water. 30.64 About 12% of your body mass is carbon; some of this is radioactive 14^C, a beta-emitter. If you absorb 100% of the 49 keV energy of each 14^C decay, what dose equivalent in Sv do you receive each year from the 14^C in your body? (inlcude units) Part B What is the average rate (in W) of energy deposition in the beef? Part C Estimate the temperature increase of the beef due to this procedure. The specific heat of beef is approximately 0.74 of that of water. 30.64 About 12% of your body mass is carbon; some of this is radioactive 14^C, a beta-emitter. If you absorb 100% of the 49 keV energy of each 14^C decay, what dose equivalent in Sv do you receive each year from the 14^C in your body? (inlcude units) Part C Estimate the temperature increase of the beef due to this procedure. The specific heat of beef is approximately 0.74 of that of water. 30.64 About 12% of your body mass is carbon; some of this is radioactive 14^C, a beta-emitter. If you absorb 100% of the 49 keV energy of each 14^C decay, what dose equivalent in Sv do you receive each year from the 14^C in your body? (inlcude units) About 12% of your body mass is carbon; some of this is radioactive 14^C, a beta-emitter. If you absorb 100% of the 49 keV energy of each 14^C decay, what dose equivalent in Sv do you receive each year from the 14^C in your body? (inlcude units)

Explanation / Answer

4.3 kGy radiataion means 4.3 kJ / kg
So, We have 1.7 kg beef...
A) Hence energy deposited = 7.31 kJ

B) Average rate of energy deposition = 7310 J / 42 s = 174.04 W

C) Q = mc *dT
So, dT = 7310 / 1.7 * 0.74 * 4186 = 1.388 degrees

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