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.
But replacing a water heater is not extremely hard, and if you follow this tutorial you'll be back in hot water in no time. Well, plan on a good 4 to 6 hours anyway. Selecting Your New Water Heater. When selecting your new water heater it's easiest to keep the same fuel type, whether gas or electric. That is the assumption made in this tutorial, that you'll keep the same fuel type as the water heater you're replacing.