The composite bar consists of a 20-mm-diameter A-36 steel segment AB and 50-mm-diameter red brass C83400 end segments DA and CB. The bars are placed between two walls when the temperature is 12 °C and all bars heated up to 18 °C Determine the displacement of A with respect to B due to the applied load and the thermal load. Steel Brass E = 200 GPa ag = 12(10-6)/°C abr= 21(10¬6)/°C Epr = 100 GPa %3D

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An electric hot water heater consumes 3.1 kilowatts of electricity and converts it to heat. How long will it take the water heater to heat a 67 gallon tank of water from 10 degrees Celsius to 50 degrees Celsius? (1 kilogram of water is 0.37 gallons, 1 Calorie = 4200 J).  It may be helpful to refer back to the weekly handout for guidance on this problem. Your final answer should be in minutes (rounded to the nearest 10 minutes).