$1.$I$1.$"Calculate the surface $/$ volume of a sphere, a cube, and a right cylinder of height equal to diameter. Which has the least surface$/$volume$?$

$1\mathrm{.}12.$ A liquid under tensile stress is unstable $[9]$; a small disturbance can cause it to boil and thereby change to a stable state. Make a list of other unstable situations demonstrable in