Abasic observation of a star is how bright it appears. this brightness is known as the star's
a. luminosity.
b. absent magnitude.
c. apparent magnitude.
d. absolute magnitude.

(a) calculate the number of electrons in a small, electrically neutral silver pin that has a mass of 10.0 g. silver has 47 electrons per atom, and its molar mass is 107.87 g/mol. (b) imagine adding electrons to the pin until the negative charge has the very large value 1.00 mc. how many electrons are added for every 109 electrons already present