Using excel, estimate the heat loss from 300 ft of 4 nom sch 40 carbon steel pipe carrying 60,000 lb/hr of hot water at 180°f for kapok insulation thicknesses of 0, 0.5, 1, 1.5, 2.0, 2.5, 3.0 in. plot class vs insulation thickness for the following conditions: (a) the pipe is above ground with air temperature as (b), but with a wind velocity of 20 mph. for this equation, use an appropriate nusselt number correlation for a cylinder in crossflow (which you can get from a heat transfer book). (b) the pipe is 10 m below ground with a ground temperature of 50 deg f. the soil has a thermal conductivity of 1.3 btu/hr-ft-r.