How to find the phase shift (the horizontal shift) of a couple of trig functions Graphing Sine and Cosine with Phase (Horizontal) Shifts, Example 2. In this video, I graph a trigonometric function by graphing the original and then applying the phase shift.
Take the electric hot-water heater recovery times and divide them in half to get the recovery time for a gas unit. Water coming into a 50-gallon tank at 40 degrees takes just 53 1/2 minutes to reach 120 degrees. For 60-degree water entering the tank, calculate about 40 minutes needed for the water to reach the 120-degree temperature. For 70-degree water, it would take 33 minutes.
Prolonging Water Heater Life. Proper water heater maintenance can increase your water heaterâs efficiency and prolong its service life. Set your water heater temperature to 120 degrees Fahrenheit. If you plan to be away, turn the water heater off or the thermostat down to its lowest setting.