The density of air ρ (Greek: rho) (air density) is the mass per unit volume of Earth's atmosphere.
In mathematics and abstract algebra, group theory studies the algebraic structures known as groups.
In the National Football League (NFL), the lowest official passer rating that a quarterback (QB) can achieve is 0.0.
In aerospace engineering, the maximum dynamic pressure, often referred to as maximum Q or max Q, is the point at which aerodynamic stress on a vehicle in atmospheric flight is maximized.
Q0 may refer to.