Consider the eigenvalue problemφ′′(x) +λφ= 0. Determine the eigenvaluesλandthe corresponding eigenfunctionsφifφsatisfies the following boundary conditions. Consider all three casesλ= 0,λ >0 andλ <0 and assume that the eigenvalues are real.

Select all the correct answers. which changes will increase the rate of reaction during combustion? decreasing the area of contact between the reactants adding more oxygen to the reaction removing heat from the reaction changing the reactants from solid form to powdered form lowering the exposure of the reactants to air