Stars A and B have the same absolute brightness and are the same temperature, but when you look in the sky, Star A looks dimmer. Why is this?
Star Ais closer than Star
B
Star A is farther away than Stars
с
Stars A and B are the same distance
None of the above

i think its 100.

hope this !

може ли да зареждате повече информация, моля

chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. these processes are called chemical reactions and, in general, are not reversible except by further chemical reactions. some reactions produce heat and are called exothermic reactions and others may require heat to enable the reaction to occur, which are called endothermic reactions. understanding chemical changes is a major part of the science of chemistry.