In the experiment food was burned and the heat released was used to change the temperature of the water. The change in temperature of water was recorded. What makes it possible to calculate the amount of energy in food?

Since a female is both xx chromosome and the male passes down the x chromosome, than the offspring would be female since a female is xx.

Silicon is cut into tiny pieces for computer chipslead is melted to form pelletsliquid water freezes to form ice

Are you asking about a street map usage  if so here is your answer  a street map for a very limited area could simply be a bit map or a .jpg image.  but a more general map would probably store the streets as vectors.  but you shouldn't assume that there is one way to do it