A star's death method is determined by its mass. A star with a mass under 4.2 times the mass of the Sun (called the Chandrasekhar limit after the University of Michigan astronomer who first determined it) will wind up a white dwarf and ultimately burn out as a heavy but small, dense object.
<span>More massive stars will become white dwarfs, neutron stars, novas, supernovas, black holes, depending on a variety of factors, including mass and the presence of a close stellar binary companion</span>
Ahy trained historians of Japan in the Western world was too small to
sustain such an enterprise. Although that number has grown, the
general editors have thought it best to draw on Japanese specialists for
contributions in areas where they retain a clear authority. In such
cases the act of translation itself involves a form of editorial cooperation
that requires the skills of a trained historian whose name deserves
acknowledgment.
Answer:
The kings time rulibg consisted of the king ignoring America and their prosperity
Answer:
The use of the abacus was expanded and refined.
Explanation:
The abacus was invented during the Yuan Dynasty which lasted between 1206AD till 1368AD and then it was expanded and refined by the Ming Dynasty (1368AD-1644AD).
There have been archaeological proof of this as the writings of Tao Zongyi describes in his book that the new servants, unlike the older and more experienced ones were "just like abacus heads" and that they would not move unless they were made to move. This bears credence to the fact that the abacus was already widely used then.
An abacus was used to count numbers.
