Abeam of 5.5 mev protons with a current of 10 ampere and a cross sectional area of 5 cm impinges on the hand of an operator. the mass stopping powers for a 5.5 mev proton in tissue p=1 g cm) are: scal/p=73.4 mev cmg' sq/p=0.0455 mev cm g! what is the dose rate to the skin of the hand where the beam impinges? 2.6e+10 rad hit 1.6e+7 radh 4.6e+3 rad h? 7.3e+6 radh 2.6e+4 rad 1

First answer marked as brainiest which is the correct equation describing the first law of thermodynamics? a) when the internal energy of a system changes, it equals the amount of heat added plus the work done. b) when work is done by the piston, it is equal to the heat added plus the change in internal energy of the system. c) when heat is added to the system, it is equal to the amount of work done by the piston plus the change in internal energy of the system.