The vector product of vectors A and B has magnitude 32.0 m2 and is in the (+z)-direction. Vector A has magnitude 8.0 m and is in the (-x)-direction. Vector B has no (x)-component. What is the direction angle θ of vector B measured from the (+y)-direction to the (+z) direction?

Consider a spherical container of inner radius , outer radius r2, and thermal conductivity k. express the boundary condition on the inner surface of the container for steady one-dimensional conduction for the following cases: (a) specified temperature of 50°c, (b) specified heat flux of 30 w/m2 toward the center, (c) convection to a medium at t with a heat transfer coefficient of h