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Imagine that you push on a large rock. at what point does your effort change the rockβs mechanical energy?
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Which statement is true about a catalyst? a: a catalyst decreases the rate of the reaction. b. a catalyst is consumed during a chemical reaction. c. a catalyst lowers the activation energy of a reaction. d. a catalyst increases the reactant concentration during a reaction.
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Which of the following is NOT one of the three layers that terrestrial worlds have?
Core
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