Discuss how does Newton's force (F) of gravitational attraction (F = G*[m1*m2]/r^2) between two water molecules (having a gravitational constant G = 6/67 *10^-11 N*m^2/kg^2 with masses m1 and m2) compare to van der waals attractive force? Assume a separation distance of r = 0.24 nm; water has a molecular mass of 18 g/mol; and van der waals attractive force is 1.6 pN, as previously calculated.