a student releases a marble from the top of a ramp. the marble increases speed steadily and travels 120cm in 2.70s. what is the marbles final speed?

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In atoms, the electron carries a negative elementary or unit charge; the proton carries a positive charge. the two types of charge are equal and opposite. in an atom of matter, an electrical charge occurs whenever the number of protons in the nucleus differs from the number of electrons surrounding that nucleus.

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Answermarble and quartzite