How many joules of kinetic energy (KE) is 20 kilotons of TNT and using KE = (1.5)(1.38 x 10^-23)T where T is the temperature of the air after impact, what was (possibly) the temperature of the air surrounding the blast at Nagasaki? Again, you have to convert 20 kilotons of TNT into joules THEN use this answer on the left hand side to solve for temperature, T, in the second equation.