4. An electric immersion heater normally takes 100 minutes to bring cold water in insulated container...
(+30) You have a half-filled hot tub that is cold (T-25 "C). You have two ways of heating it up: add more hot water (maximum T = 45 "C) and/or turn on the electric heater (5 kW). The total water capacity of your well-insulated hot tub is 1.0 m3, and the desired water temperature is 38"c. a. If you just use the electric heating element to heat up the existing water, without adding any new hot water: i. (+8) How...