Which statements must be true? Check all that apply. A'A = C'C C'Q = QC Line P T⊥ A'A C'C ⊥ B'B A'A || B'B m∠TRB = 90°

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Summarize the work of famous environmental scientists of the past.

Which statement best describes gravity? it is the force that repels only very small objects. it is the force that acts between objects with zero mass. it is the force that sometimes acts only on very large objects. it is the force that acts between any two objects in the universe.