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).
The average human body is estimated to be about 60 to 70 percent water. The percentage may be as high as 75% in infants, decreasing to 57-60% in adults. This does not include water that is part of hydrated chemical compounds in the body, which can only be removed chemically or by heat drying. Human skeletons represent about 30 to 40% of body weight, and when desiccated can weigh half that.