Question

Consider a system of nonrelativistic electrons in a white dwarf star at a

temperature of 109 K. Very roughly, what would be their density if the system

is degenerate? How does this compare with typical electron densities in

ordinary matter of about 1030 electrons/m3?

Answer 1

In plane surveying, the area of a tract of land is taken as its projection upon a horizontal plane. However, of much larger tracts of land such as a country or a continent are taken as the

 

projection of the tract upon the earth's spheroidal surface at mean sea level

For large area projection is done upon the earth's spheroidal surface at MSL