The phrase "one on a side" means that two individuals are working on their respective sides of an object, such as a wall. It indicates that they are collaborating from opposite sides. Thus, when related to the provided options, it suggests that the speaker and the neighbor are repairing the wall from opposite sides. ;
A current of 15.0 A flowing for 30 seconds results in a charge of 450.0 C. This corresponds to approximately 2.81 x 10^21 electrons flowing through the electric device. This calculation is based on the relationship between current, charge, and the charge of an electron.
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