Question

Transforme 500 j em cal

Answer 1

1j-------4,2 cal
500j----x cal 
x= 500*4,2/1
x=2100 cal

Answer 2

vamos transformar :
1Joule s----------0,2388Calorias
500Joules----------C

C = 500joules x 0,2388 calorias
.......______________________
..............................1joules

C = 119,40calorias