1. There is a common misconception that the pits and lands in optical discs represent zeros and ones. Research the function performed by the pits and lands in CD, DVD, and Blu-ray discs and explain how they are interpreted. Recordable discs do not use pits and lands. Research these discs and describe how they convey zeros and ones. Be sure to thoroughly cite the sources of your research.

The magnitude of the amount of energy released by burning a fuel source, measured in energy per unit mass, is called its fuel value. note that the fuel value is the negative of the isobaric specific heat of combustion for the fuel. if all the energy obtained from burning 1.23 pounds of butane with a fuel value of 10.85 kcal/g is used to heat 128.0 kg of water at an initial temperature of 18.3 °c, what is the final temperature? note that 1 lb = 453.6 g.