Astronomers use the color of stars to determine how hot they are and their brightness to estimate how far away they are. <em>(D)</em>
A state in which an atom has more energy than it does at its ground state.
Hopes this helps!
<span>rusting takes a long time, and rusting is a chemical change</span>
This is an excellent question that i do not have the answer to.
Answer:
This happens in two ways. If an object is at rest and an unbalanced force pushes or pulls the object, it will move. Unbalanced forces can also change the speed or direction of an object that is already in motion.
Explanation:
