The transfer of energy by heat flow through a substance is accomplished by conduction convection radiation all of the above

Which class of molecules functions as chemical signals? hormones water carbohydrates proteins

The bond energy for the van der waals bond between two helium atoms is 7.9×10−4ev. assuming that the average kinetic energy of a helium atom is (3/2)kbt, at what temperature is the average kinetic energy equal to the bond energy between two helium atoms

The element that has the greatest electronegativity is