a 0.3-m-diameter, 5-mm-thick horizontal copper disk is heated from below at a rate of 70 kw. the top of the disk is polished, and exposed to a water bath at atmospheric pressure. determine the maximum disk temperature when nucleate boiling is occurring. in an effort to reduce the temperature of the copper disk, a 1- mm-thick nickel coating is applied to the top of the disk, which in turn reduces the value of cs,f . calculate the maximum temperature of the coated disk. does the coating reduce the maximum copper temperature? neglect any contact resistance between the copper substrate and the nickel coating