We must rewrite the Newton's <span>Second</span> Law:
Applying in the question:
Answer: C. Electron degeneracy pressure depends on the speeds of electrons, which approach the speed of light as a white dwarf's mass approaches the 1.4-solar-mass limit.
Explanation:
Formula for calculating [Average Atomic Mass] of Pb (Lead):AAM of [element] = (Mass of isotope) * (Relative abundance) and you can repeat the "(Mass of isotope) * (Relative abundance)" part for each isotope! Therefore...AAM of Pb=(203.97302)(0.014)+(205.97444)(0.241)+(206.97587)(0.221)+(207.97663)(0.524)AAM of Pb = 207.21688371 amu [OR] 207.2 amu on most periodic tables.