. A light wave bends to pass through a crack underneath a door. What type of interaction is this?

In an exothermic reaction the bonding energy of the product is: less than the reactants same as the reactants greater than the reactants dependent upon the presence of a catalyst

Which element has the lowest electronegativity? calcium(ca) gallium(ga) selenium(se) bromine(br)

Why is it possible for different microorganisms to extract energy not only from carbohydrates and other biological molecules but from a large variety of substances?