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Students design a model roller-coaster track. they place a rubber ball at the highest point on the track and let it go. the ball rolls along the track pulled only by the force of gravity. eventually, it comes to a stop. which change to the design will result in the ball moving the greatest distance?
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If the chemical properties of a substance remain unchanged and appearance or shape of a substance changes it is called a ?
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Smallest intensity of a stimulus that you can detect 50 percent of the time is
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