You can tell whether people are nearsighted or farsighted by looking at the size of their eyes through their glasses. when a person's eyes seem magnified, is the person nearsighted or farsighted?

On a spring day, a middle-latitude city (about 40? north latitude) has a surface (sea-level) temperature of 10 ? c. if vertical soundings reveal a nearly constant environmental lapse rate of 6.5 ? c per kilometer and a temperature at the tropopause of –55 ? c, what is the height of the tropopause?