Vector Fields in Maple. A vector field is described by a function that takes each point of the plane to a vector. > with(linalg): > F := (x,y) -> [-y,x]; We can evaluate this function at a point by plugging in values for x and y , just like we do with functions whose values are scalars.
The survey of U.S. parents finds that out of children participating in Fall and Winter sports, just 60 percent are wearing mouth guards. Taking a closer look at mouth guard usage for some higher-impact sports, the survey shows that for football, just 32 percent of parents report their child wears a mouth guard, for field hockey, just 14 percent. Lacrosse and ice hockey both fall at 11 percent, alongside volleyball. The complete list can be found here.
1 Two-percent milk was reported as the type of milk usually consumed by 45.4% of children and adolescents. 2  Adolescents aged 12â19 years reported low-fat milk as their usual milk type more often than younger children aged 2â5 years.mong children who reported milk consumption, 20.2% reported low-fat milk, 45.4% reported two-percent milk, and almost one-third (32.4%) reported whole milk as the type of milk usually consumed (Figure 2).