You put this rod under scanning electron microscope and you found a crack on the surface. You would like to determine the maximum allowable surface crack length by assuming that the applied tensile strength was a critical stress. Determine the maximum allowable surface crack length if the surface energy is 0.5 J/m2

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