Identify from the following list which examples are controlled experiments. You make two pitchers of lemonade and only change the amount of lemonade mix you add. only change the amount of water you add. change both the amount of water and the amount of lemonade.

It s A) only change the amount of lemonade mix you add, and B). only change the amount of water you add. I just did it

vanderwaal's forces of attraction are the electrostatic intermolecular forces that exist in a molecule due to the temporary or permanent dipoles that are developed in a molecule. in , the major intermolecular forces are dipole-dipole interactions as the molecule is polar (bent structure). so the vanderwaal's forces of interaction in between molecules are the permanent dipole-dipole interactions that develop due to the dipole that exists in between the polar h - s bond. the positively charged hydrogen atom is attracted towards the negative end of the dipole that is sulfur of the adjacent molecule. therefore, these forces of attraction are relatively stronger than that of london dispersion forces that exist in non polar molecules.

tracks, burrows, eggshells, nests, tooth marks, or gastroliths