We engineers love our equations. Imagine asking an engineer a question, and they hold up a finger gesturing for you to wait quietly while they punch numbers into their calculator. You can hear the calculator buttons clicking as quickly as someone typing on a keyboard. After an anticipatory pause, they look up at you and give you some astronomical figure that makes your eyebrows go up involuntarily, at the same time thinking. “This person really knows their stuff!”
Or do they? What is even better is when we invoke the name of an equation or principal that barely applies to the situation at hand. It was just an opportunity to throw it out there as if we were casting a spell: “Psychrometric Chart” or “Ideal Gas Law”.