Dynamics (and Thermo)

[Aerith's Knight]

I get snappy when people are condescending, that's all.

The atmospheric pressure was 101kpa, the gage pressure was 100kpa. Gage is pushing up, atmosphere is pushing down, their sum is 1kpa, isn't it? Otherwise it would be 201 which seems even less likely.

For gases, pressure is sometimes measured not as an absolute pressure, but relative to atmospheric pressure; such measurements are called gauge pressure (also sometimes spelled gage pressure). An example of this is the air pressure in an automobile tire, which might be said to be "220 kPa/32psi", but is actually 220 kPa/32 psi above atmospheric pressure. Since atmospheric pressure at sea level is about 100 kPa/14.7 psi, the absolute pressure in the tire is therefore about 320 kPa/46.7 psi.

Why don't you give that a good read.

And I wasn't even being condescending, just happy to finally be the first one to help someone. I just read something wrong(you get like that when you're in a hurry but still want to help someone), forgive me for being human.

But if it's this bothersome to you, I will refrain from it in the future, I don't need the grief.