An hour after you go to sleep, a loud noise awakens you. You emerge from sleep confused and do not remember the noise. You were in which stage of sleep?

Alloys are complex metals that are combinations of elemental metals.This idea is similar to the

idea of A) the id B) the Oedipus complex C) secondaryemotions D) the MMPI

In classical conditioning, the optimal order is:

(a) unconditional stimulus - lengthy break - neutral stimulus (b) neutral stimulus - lengthy break - unconditioned stimulus (c) unconditioned stimulus - short interval - neutral stimulus (d) neutral stimulus - short interval - unconditioned stimulus