Q: Which law means that the simplest of competing theories is most likely to be correct? Read this paragraph and choose the correct option from the provided answers: The formation of scientific theories is generally guided by the law of parsimony. According to this law, the simplest of competing theories is most likely to be correct. Choices: - Newton's law - Law of Conservation - Murphy's Law - law of parsimony A:
law of parsimony

Q: Many transition metals and their compounds are used as what? Read this paragraph and choose the correct option from the provided answers: Many transition metals and their compounds are used as catalysts. Given MnO 2, FeCl3, Pt, and Ni, which would you select for each purpose and why?. Choices: - insulators - bases - sealants - catalysts A:
catalysts

Q: What force is greater on rougher surfaces than smooth surfaces? Read this paragraph and choose the correct option from the provided answers: Rougher surfaces have more friction between them than smoother surfaces. That's why we put sand on icy sidewalks and roads. The blades of skates are much smoother than the soles of shoes. That's why you can't slide as far across ice with shoes as you can with skates (see Figure below ). The rougher surface of shoes causes more friction and slows you down. Heavier objects also have more friction because they press together with greater force. Did you ever try to push boxes or furniture across the floor? It's harder to overcome friction between heavier objects and the floor than it is between lighter objects and the floor. Choices: - tension - acceleration - gravity - friction A:
friction