Final answer:
One complete cycle of 400-Hz AC power, used in military aircraft to allow for lighter equipment design, takes 0.0025 seconds.
Step-by-step explanation:
The student's question pertains to various aspects of physics, specifically in aviation and aerospace contexts. They are inquiring about the fuel flow rate for an aircraft performing a Visual Flight Rules (VFR) pattern, which is approximately 4,500 pounds per hour (PPH).
To answer the question provided regarding the 400-Hz AC power used in military aircraft, we can calculate the time for one complete cycle of this power using the formula T = 1/f, where T is the period or the time for one cycle, and f is the frequency.
For 400 Hz frequency: T = 1/f = 1/400 Hz = 0.0025 seconds. Therefore, one complete cycle of 400-Hz AC power takes 0.0025 seconds. This high-frequency power allows for designing lighter equipment, beneficial for military applications.