An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?
Answer (2)
The question requires identifying the record-keeping duration for refrigerant evacuation.
EPA regulations mandate a 3-year record-keeping period for appliances with a 5-50 pound charge.
Therefore, the answer is 3 years .
Explanation
Understanding the Problem The question asks about the required record-keeping duration for technicians evacuating refrigerant from appliances with a full charge between 5 and 50 pounds that are being disposed of. We need to identify the correct duration from the given options.
Identifying the Correct Record-Keeping Duration Based on EPA regulations, technicians evacuating refrigerant from appliances with a full charge of more than 5 pounds and less than 50 pounds that are being disposed of must keep records of the event for 3 years.
Concluding the Answer Therefore, the correct answer is B, which is 3 years.
Examples
Understanding record-keeping requirements is crucial in many fields. For example, in environmental science, tracking the disposal of hazardous materials like refrigerants ensures compliance with regulations and helps prevent environmental damage. Knowing that records must be kept for 3 years allows for proper monitoring and accountability, similar to how businesses maintain financial records for auditing purposes or healthcare providers keep patient histories for continuity of care.
Approximately 2.81 × 1 0 21 electrons flow through the device that delivers a current of 15.0 A for 30 seconds. To find this, we calculated the total charge in coulombs and then divided by the charge of a single electron. This shows the vast number of electrons involved in even small amounts of current over time.
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