HVAC · Practice-Exam-1 · Problem 53

Video Synthesis

Problem: Hair exits a nozzle at 500 feet per second into a 70 degree room at atmospheric pressure.
Approach: Well the equation for the Mach number and you can look this up in the reference handbook by searching Mach number is V the velocity over C, the speed ...
Key step: We already know the velocity is 500 feet per second so that's done.
Watch out: Now I'll be honest that number tends to escape me at the most inconvenient times so I don't necessarily rely on memorizing it.
Result: Now let's get rid of some units we've got pound force going away, pound mass going away, rank in cancels, feet multiplied by feet is feet squared, it'...
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