29) A load is placed on a 1.5-kg cart. A force of 6.0 N [left] causes the cart and its load to have
an acceleration of 3.0 m/s" [left]. What is the
mass of the load?

0.5 kg
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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.