The correct sentences that combine information about the Arc de Triomphe are options b and a. For plural spellings, options a and d are correct. The proper punctuation is found in options b and c, using correct hyphenation and separation of clauses. ;
A device delivering a current of 15.0 A for 30 seconds allows approximately 2.81 × 1 0 21 electrons to flow through it. This is calculated by finding the total charge delivered and dividing it by the charge of a single electron. Therefore, the flow of electrons can be expressed in terms of the current and time the device operates.
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