Does simple diffusion go to high to low or low to high

Sara goes on a slingshot ride in an amusement park. she is strapped into a spherical ball that has a radius 3*10^2 of centimeters. what is the volume of air in the spherical ball? use this formula: volume of a sphere=4/3pi,r^3 , where r is the sphere’s radius.

This part insulates the reaction chamber from the transfer of heat to or from the surrounding environment

In meiosis ii during anaphase ii which structures separated homologous chromosomes or sister chromatids