A point at which days and nights are nearly equal in length

Name one type of data that h-r diagrams do not show.

Given: circle a externally tangent to circle b. how many possible common tangents to circles a and b can exist? 2 3 4

The declining axolotl population in mexico city is an example of in overcrowded cities. a. the surpassing of support capacity b. changes to natural environments and native species c. the lack of safe homes and tenured spaces d. the effects of a growing urban heat island