1- How many joules would it take to melt all the ice on earth?

No idea It takes 334 kilojoules to melt a kilogram of ice -- or about 7,500 joules to melt an ice cube (1.5" x 1" x 1"). How much ice exists on the planet?

In addition, ice has a density of 0.917 g/cm^3, so it takes about 343 j to melt a cubic centimeter of ice; multiply this by the number of cubic centimeters per cubic meter, etc and you get 9.6 x 10^23 joules of energy needed to melt all of the ice on Greenland (Greenland has about 2.8 million cubic kilometers of ice).


The Earth receives about 5.5 x 10^24 joules of energy from the Sun every year, so divide that by 365.