Consider a large plane wall of thickness l 5 0.3 m, thermal conductivity k 5 2.5 w/m·k, and surface area a 5 12m2.theleftsideofthewallatx50issub jectedtoanet heat flux of q·0 5 700 w/m2 while the temperature at that sur- face is measured to be t1 5 80°c. assuming constant thermal conductivity and no heat generation in the wall, (a) express the differential equation and the boundary conditions for steady one-dimensional

Which lists the main components of darwin’s theory of evolution? a. random mutations drive evolution; the evolution of a population happens slowly; organisms have common ancestors; organisms do not change. b. natural selection drives evolution; the evolution of a population happens slowly; organisms have common ancestors; organisms change over time. c. natural selection drives evolution; the evolution of a population happens rapidly; organisms have common ancestors; organisms change over time. d. random mutations drive evolution; the evolution of a population happens rapidly; organisms have common ancestors; organisms do not change.

The long handle on a rake is a(n) a. lever b. screw c. wedge d. inclined plane

Which fact supports the conclusion that there will be fewer farm managers in the future? a) a farmer manager’s duties vary by the type of farm. b) farm technology is replacing some administrative jobs c) farm managers often need experience but not education. d) administrative duties include budgeting and training staff.