Final answer:
If one input exceeds one output in a reservoir, the water level could rise, potentially requiring a dam redesign. Firms may shift production techniques if an input's cost rises. The river with two waterfalls analogy illustrates parallel resistors but has limitations.
Step-by-step explanation:
When considering a reservoir with several inputs and outputs, if one input exceeds one output, several outcomes are possible. The overall water level of the reservoir could rise if the total input exceeds the total output, potentially leading to overflow.
Alternatively, if other outputs compensate for the higher input, the water level might remain stable. In a scenario where the reservoir's area is doubled but the depth remains the same, the dam design may need to be reassessed to handle the increased water volume and potential pressure on the dam structure.
Similarly, when discussing firms and production decisions, if one input becomes relatively more expensive, firms may alter their production technology to utilize less of the expensive input or switch to substitutes.
The analogy of a river and two waterfalls to model a parallel configuration of two resistors demonstrates how electrical current divides among multiple pathways, much like water flow; however, this analogy breaks down when considering complex electrical behaviors that do not have direct natural counterparts.