All planets move around the sun
This would be an illustration of Newton's first law of motion. Law of inertia, an object moving at constant velocity will keep moving at constant velocity until a force is acted upon it. Inertia is the tendency of an object to keep moving in a particular direction resisting to change, unless a force acts upon the object.
B is the answer...
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B. Ptolemy believed that the earth was the center of the universe
Hey there!
When light changes speed, it REFRACTS.
Your answer is going to be option C.
Hope this helps you.
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