Physics, 20.10.2020 21:01 kenisonpaigebosma
Which of the following examples shows that a chemical reaction has occurred?
O A solid is formed when heat is removed from a sample of water.
A rock breaks into smaller pieces when it is struck with a hammer.
O A cup of water turns pink when a few drops of red food coloring are added.
Bubbles form when baking soda is added to vinegar and mixed.
Answers: 2
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Apulley with a mechanical advantage of 5 will require you to pull times the amount of rope. a. 1/5 b. 5 c. 10 d. 15
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Polly is pushing a box across the floor with a force of 30 n. the force of gravity is –8 n, and the normal force is 8 n. which value could describe the force of friction if polly could not move the box?
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The air that we breath is made mostly of which gaseous molecule
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Gasoline comes from petroleum, which is made from ancient living things. petroleum, therefore, contains a type of energy. a. heat b. nuclear c. biological d. chemical potential
Answers: 2
Which of the following examples shows that a chemical reaction has occurred?
O A solid is formed wh...
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