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.
Replacing your water heater with a new one will help you decrease your energy or gas bill with new technology. Typically, water heaters should last between 10-15 years and as long as you perform regular maintenance on it, it should last a good amount of time.est Answer: AO Smith makes a good heater, but I'd start planning a replacement. 14 years is a pretty long time for a heater to last.