At what year will Sagittarius be visible from the earth’s North Pole?

Arock can be broken down into different kinds of substances by physical processes. no chemical reactions are needed to separate different parts of a rock into pure substances. this is because a rock is a(n)

Based on the equation and the information in the table, what is the enthalpy of the reaction?

Use the periodic table to determine the electron configuration of dysprosium (dy) and americium (am) in noble-gas notation.