Physics, Heat Transfer Fluid, Atmospheric Physics.
0.3 * 100 W * 21,600 seconds == 648,000 Joules. Note, that I still didn’t get it to boil. In the microwave oven, in 2 minutes (== 120 seconds), I used 1200 W, i.e., 1200 J/sec to get my water boiling. Again, 1200 W * 120 sec == 144,000 Joules and did get it to boil. The microwave will use