Respostas

2014-07-15T11:45:03-03:00
A) 1 cal --- 4,18 J
8368/4,18 = 2001,9 cal

b) 12540/4,18 = 3000 cal = 3kcal

c) 5,2kcal = 5 200 cal*4,18 = 21 736 J