// Workers AI · dad joke modeWhat did H0 say to H1? You're always one step ahead of me in the H-index.

Not to be confused with Ho (H followed by the letter O).

H0 (H followed by zero), H₀, or H00 may refer to:

• H0 scale, used in rail transport modelling
• Higgs boson, in physics, symbol H⁰
• Hammett acidity function, in chemistry, H₀
• Hubble constant, in cosmology, H₀
• Null hypothesis, in statistics, often denoted H₀
• HMS Comet (H00), a British and later Canadian warship
• Stye, a bacterial infection of the eyelid, ICD-10 code H00

See also

• 0H (disambiguation)
• Ho (disambiguation)