1. An electric boiler (cylindrical 2 m long, 1.5 m diameter) is used to heat water from 5 to 50 C at a rate of 15 kg/h. The surface of the boiler is at 40 C while the air temperature is 20 C. If the boiler operates at steady state, radiative heat transfer is negligible, the heat transfer coefficient is 5 W/m2-K, and the heat capacity of water is 4200 J/kg-K, how much power is required to operate the boiler? (15 pts) q"cony _L=2 m D=1.5 m m=15 kg/h, T=5C m=15 kg/h, T=50C Powerin