Explanation:
To determine the speed at which water comes out of his faucet, Francisco would need two essential pieces of information:
1. **Flow Rate (Volume per Unit of Time):** Francisco would need to know how much water (in liters, gallons, or any appropriate unit) flows out of the faucet in a given amount of time, typically measured in seconds or minutes. This is important because it tells him the quantity of water being dispensed per unit of time, which is crucial for calculating speed.
2. **Cross-Sectional Area of the Faucet Opening:** Francisco would also need to measure or determine the cross-sectional area of the faucet's opening through which the water is flowing. This is usually measured in square inches, square centimeters, or similar units. The cross-sectional area is necessary because speed is calculated as the flow rate divided by the area, i.e., speed = flow rate / cross-sectional area. A narrower opening would result in a higher speed for the same flow rate.
With these two pieces of information, Francisco can calculate the speed of the water coming out of his faucet using the formula: speed = flow rate / cross-sectional area.