1detergents oil and water to mix. detergents work because one end of the
molecule is polar and the other end is not
which end of a detergent molecule is polar? is it the hydrophilic end or the
hydrophobic end? explain your answer.
are oil molecules polar? use your answer to question 1 to you explain.

Which best explains how a heat pump can heat a room? cold air from the house is moved through pipes, where it absorbs thermal energy. warm air from outside is pushed into the house to replace the cold air. combustion warms the air when chemical energy is transferred to thermal energy. fuel is used to move a piston, which pushes warm air into the house.