The National Weather Service routinely supplies atmospheric pressure data to help pilots set their altimeters. The units the NWS uses for atmospheric pressure are inches of mercury. A barometric pressure of 30.51 inches of mercury corresponds to kPa.
A) 1.020
B) 16.01
C) 77.50
D) 103.3
E) 775

Question

Quizplus · Accepted Answer

To convert from inches of mercury to kPa, we use the conversion factor 1 inHg = 3.386 kPa. Therefore, 30.51 inHg is equal to (30.51 inHg) x (3.386 kPa/inHg) = 103.3 kPa. So the answer is D) 103.3.

The National Weather Service Routinely Supplies Atmospheric Pressure Data to Help