Afurnace wall is to consist of a series of 7 in. of kaolin firebrick (k = 0.100 btu/hr ft∙°f), 6 in. of kaolin insulating brick (k = 0.12 btu/hr∙ft∙°f), and sufficient fireclay brick (k = 0.54 btu/hr∙ft∙°f) to reduce the heat loss to 100 btu/hr∙ft2 when the face temperatures are 1500 °f and 100 °f respectively. what thickness of fireclay brick should be used? if an effective gap of 1/8 in. can be incorporated between the fireclay brick and the insulating brick when installing the wall without impairing its structural support, what thickness of insulting brick will be required?

Amass of m 1.5 kg of steam is contained in a closed rigid container. initially the pressure and temperature of the steam are: p 1.5 mpa and t 240°c (superheated state), respectively. then the temperature drops to t2= 100°c as the result of heat transfer to the surroundings. determine: a) quality of the steam at the end of the process, b) heat transfer with the surroundings. for: p1.5 mpa and t 240°c: enthalpy of superheated vapour is 2900 kj/kg, specific volume of superheated vapour is 0. 1483 m/kg, while for t 100°c: enthalpy of saturated liquid water is 419kj/kg, specific volume of saturated liquid water is 0.001043m/kg, enthalpy of saturated vapour is 2676 kj/kg, specific volume of saturated vapour is 1.672 m/kg and pressure is 0.1 mpa.

Determine whether or not it is possible to compress air adiabatically from k to 140 kpa and 400 k. what is the entropy change during this process?

The higher the astm grain-size number, the coarser the grain is. a)-true b)-false