Question 9 of 10 A team of engineers has decided to design a new shoe for people suffering
from a painful foot condition. What should the engineers do during the
planning stage of their project?
A. Look at the trial's results to see how the design can be improved.
O B. Estimate how much potential consumers would be willing to pay
for this new shoe.
C. Have patients wear the new shoe in an experimental trial to see if
symptoms improve.
D. Build a variety of shoe models.

your answers are a,b,,e and f

i hope this

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.