physics..HELP??? please

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in physics terms what does vacuum mean?? i thought they meant a vacuum sweeper?? huh? The question is " The same object is dropped in a vacuum and then in air. Whaich of the parameters( distance,velocity,acceleration) vary and which remain constant during succeding seconds of time
A. in a vacuum
B. in air when terminal velocity from air resistance has been reached?

  • physics..HELP??? please -

    a vacuum has no air in jt

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