A student plans to investigate how different factors affect the rotation rate of a hand-made motor when connected to a battery. The student will test a different variable in each investigation: the voltage of the battery (V), the number of loops used in the wire coil, and the number of magnets used below the loops. The first table shows details and predictions for investigation 1.

some think that theories become laws, but theories and laws have separate and distinct roles in the scientific method. a law is a description of an observed phenomenon in the natural world that hold true every time it is tested. it doesn't explain why something is true; it just states that it is true.

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the independent variable, or the one that is intentionally manipulated is the speed.

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