Question

A worker in a Mexican restaurant drops a 1 kg container of frozen chalupa sauce, that rolls off a counter and out a window, falling to the ground below.   The chalupa sauce was at its freezing temperature, and after it hits the ground, it is discovered that 8 grams have melted. The container itself is thin plastic, and we'll ignore it.
       (A)    How much heat was required?
       (B)    How fast was the container travelling just before it hit the ground?

Answer 1