Question regarding the paper "Coronal Holes" by Steve Cranmer, in "Encyclopedia of Astronomy and Astrophysics", 2000, in press. p.4: Parker wind: 1) Assume the atmosphere in a coronal hole is ~ 1MK, and collisionless from the base. Explain why there is a solar wind in this case. 2) Now assume the plasma is Maxwellian all the way through infinity (patently untrue), the gas law applies, and T = 1 MK all the way through. Calculate the pressure at infinity for a static atmosphere. Why must there be a solar wind? 3) Write down the stationary solar wind equations, and solve for the "solar breeze" (subsonic throughout, Chapman, 1950's). Can this be a valid solution? p.5, second equation. 1) Show that the equality applies for waves and turbulence. 2) What is the relation between v and m for a plasma in thermal equilibrium (T_e = T_i = T_p)? p.6, second equation 1) Derive this result from a cartoon (no hard math required). 2) What is the implicit assumption on the line source?