Which of the following is NOT proof of a chemical change

A. Getting Hotter

B. Getting colder

C. Color change

D. Gets Cloudy

E. ALL ARE PROOF

Spend time observing or thinking about events that involve matter and energy. which events can you explain? which events can’t you explain?

The two required components for a generator are

According to an observer on earth, planet x is stationary. maria and samir depart earth on their spaceships at the same time, each flying at 0.5c. maria flies toward planet x and samir flies in the opposite direction. according to maria, her voyage to planet x takes 9 years. how many years does maria's voyage take according to samir?