A patient preparing for a Pap test should be instructed not to douche for ____ hours prior to the test

Which of the following building materials absorbs heat as moisture evaporates?

A. Metal B. Gypsum C. Lath and plaster D. Reinforced concrete

Which type of study investigates existing differences to determine possible causes?

A) Experimental B) Ex post facto C) Correlational D) Quasi-experimental E) None of the above