A few years ago Robert noticed a few gray hairs. A little frustrated, he was able to isolate and pluck them out one by one; howe
ver, recently his gray hairs have become overwhelming in number and he has more gray hairs than brunette. Which of the following best describes the development of time period Robert is in? a. early adulthood
b. young adulthood
c. mid-adulthood
d. late adulthood
This stage of life when gray hairs become overwhelming in number and he has more gray hairs than brunette( brown hair) is called middle adulthood. Middle adulthood spans from 20 to 40 years of life which may be defined differently for different culture and country.
Robert is in his late mid adulthood somewhere near 40 at this age hair generally grow grey.
The Sun is a main-sequence star, and thus generates its energy by nuclear fusion of hydrogen nuclei into helium. In its core, the Sun fuses 620 million metric tons of hydrogen each second. The nuclear binding energy curve.
