Final answer:
The maximum cord length for a 240V window A/C unit is determined by various factors including current draw, voltage drop, wire gauge, and electrical codes, which are not provided here. The information relates to electrical properties like current density and drift velocity, but not directly to cord length calculation.
Step-by-step explanation:
The question pertains to the electrical specifications and requirements for a 240V window A/C unit. To determine the maximum cord length, one must consider factors such as the current draw of the appliance, voltage drop, wire gauge, and safety standards. Information provided suggests a focus on current density and drift velocity which are both related to the Electrical Physics topic. However, the maximum cord length must be derived from electrical code regulations, which aren't provided in the background information. When using an extension cord with appliances, it's crucial to ensure it's robust enough to carry the appliance's current without causing significant voltage drops or overheating, as it could happen with the outside refrigerator connected with an inexpensive long cord, causing it to malfunction.