Reflex angle because straight is 180 and right is 90 and acute is less than 90
The correct is B, the ball in her hands has potential energy. When it falls, the potential energy changes to kinetic energy.
Answer:
They are so small that they barely make up any of the mass of the atom, and they are so miniscule that during Rutherford 's Gold foil experiment ,they didn't even react with the alpha particles. They circle the nucleus on a ring. shown through Rutherford Atomic Model
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