''eta'' is the greek letter ''H, η'' - pronounced : ητα (in the greek alphabet)
one of the three similar 'e's : η, ι, ει - all of them heard as 'e'
The Greek letter for efficiency is "η" which is pronounced as "eta".
theta
The answer is the small greek letter eta: η See: http://en.wikipedia.org/wiki/Eta
The Greek letter that is between zeta (Ζ, ζ) and theta (Θ, θ) is eta (Η, η). In the Greek alphabet, eta comes after zeta and before theta.
Epsilon Eta
Eta Rho Tau Phi Chi Psi
eta + eta =beta
Eta (pronounced "EE-tah") and written as "H".
Theta is the ninth letter of the Greek alphabet the eighth is Eta
ETA (somethint to do with the H in greek)
The seventh letter of the greek alphabet is eta In modern Greek its η,Η (Eta) In ancient Greek it was ζ,Ζ (Zeta). That is because the ancient 6, which was the ''στ,ΣΤ'' is no longer used.
Θ [ theta]is the eighth letter of the Greek alphabet.