1. The problem statement, all variables and given/known data Cloud droplets begin to form on a population of condensation nuclei as the saturation ratio is gradually increased, with temperature held constant. The nuclei have the same chemical composition but a broad range of sizes. Droplets are activated with radii 0.5 μm when the supersaturation reaches 0.15%. Droplets continue to be activated as the supersaturation is raised to 1%. Solve for critical radius corresponding to a supersaturation of 1%. Also solve for the temperature. 2. Relevant equations S*=critical supersaturation S=supersaturation r*= critical radius r*= (3b/a)^(1/2) S*=1+((4a^3)/(27b))^(1/2) S=1+(a/r)-(b/r^3) 3. The attempt at a solution What ive done: S*=critical supersaturation S=supersaturation = .0015 r= .5 I plugged into S=1+(a/r)-(b/r^3) I solved for a, then plugged a into S*=1+((4a^3)/27b))^(1/2) then solved r*=(3b/a)^(1/2) The right answer .075μm and t+293K- but I cannot get this at all.