Resembles a sideways among us character, it even has the oxygen tank, but in many fonts it does not look as good as other ways to type Crewmate, such as ඞ. It looks great in arial font, however.
The glyph is made from a variant of the Greek letter Rho and the Cyrillic letter Zemlya (Ze) with a hook.
It is the fluid pressure equation. P stands for the pressure, ρ stands for the density of the fluid medium, g is the acceleration due to gravity (9.81ms^-2 on Earth) and h is the height of the measured pressure's distance from the surface of the fluid itself.
HKCEE physics paper: Peter filled a tube measuring 3m tall with water to the brim. Find the pressure at the middle of the water tube. (Density of water at r.t.p= 997kgm^-3)
By P=ρgh
P=(997)(9.81)(1.5)
P=14700 Pa (3 sig fig)