Final answer:
The nurse would locate the apical pulse in the 5th intercostal space, midclavicular line.
Step-by-step explanation:
The nurse would locate the apical pulse in the 5th intercostal space, midclavicular line. This is where the apex of the heart is located, which is the point of maximum impulse. By placing a stethoscope in this location, the nurse can assess the heart sounds and determine its rhythm and rate.