Even a new, minimum efficiency air conditioner or furnace can be a significant jump in efficiency. The old furnace in your basement may only be originally rated at 60% to 70% AFUE. In order to comply with national regulations, furnaces manufactured today have to be rated at a minimum of 80% AFUE.
dipole - a pair of equal and opposite electric charges or magnetic poles separated by a small distance. couple - (physics) something joined by two equal and opposite forces that act along parallel lines. electric dipole, electric doublet - a dipole with equal and opposite electric charges.
VERY weak Dipole-dipole forces-present only in polar molecules (permanent dipoles) Polar molecules have a partially negative charge on one end and a partiall negative charge on the other end.t is the attraction between the atoms in the molecule because of charge differences. for example MgSO4 london dispersion forces are the same as dipole dipole but are much weaker and only occur between diatomic molecules. (any element with itself).