Which numerical setup can be used to calculate the
heat energy required to completely melt 100. grams of
H2O(s) at 0°C?

under a microscope, cancer cells may look very different from normal cells. they often have different sizes and some may be larger than normal while others are smaller. cancer cells are often abnormally shaped and the control centre of the cell (the nucleus) may have an abnormal appearance.

i think? ?

it's c (engineer's do their work with mechanical stuff not on any living being)