A labor-hour contract is a variation of the time-and-materials contract, differing only in that materials are not supplied by the contractor. See 12.207(b), 16.601(c), and 16.601(d) for application and limitations, for time-and-materials contracts that also apply to labor-hour contracts.
Appraising the brain's energy budget. In the average adult human, the brain represents about 2% of the body weight. Remarkably, despite its relatively small size, the brain accounts for about 20% of the oxygen and, hence, calories consumed by the body (1). This high rate of metabolism is remarkably constant despite widely varying mental and motoric activity (2).
Women are believed to have more essential body fat than men because of childbearing and hormonal functions. In general, the total body fat percentage (essential plus storage fat) is between 12% and 15% for young men and between 25% and 28% for young women {Lohman, 1993 #4151} (see also table 13.1). Average percentages body fat for the general population and for various athletes are presented in table 13.2. Please keep in mind that these are only rough estimates. The term athletic in this context refers to sports where low body fat is an advantage.