The upper surface of a 50-cm-thick solid plate (k = 237 w/m·k) is being cooled by water with temperature of 20°c. the upper and lower surfaces of the solid plate maintained at constant temperatures of 60°c and 120°c, respectively. given: the thermal conductivity of the solid plate is given as k = 237 w/m∙k. determine the water convection heat transfer coefficient and the water temperature gradient at the upper plate surface.

Two flowing streams of argon gas are adiabatically mixed to form a single flow/stream. one stream is 1.5 kg/s at 400 kpa and 200 c while the second stream is 2kg/s at 500 kpa and 100 ? . it is stated that the exit state of the mixed single flow of argon gas is 150 c and 300 kpa. assuming there is no work output or input during the mixing process, does this process violate either the first or the second law or both? explain and state all your assumptions.

Ariver flows from north to south at 8 km/h. a boat is to cross this river from west to east at a speed of 20 km/h (speed of the boat with respect to the earth/ground). at what angle (in degrees) must the boat be pointed upstream such that it will proceed directly across the river (hint: find the speed of the boat with respect to water/river)? a 288 b. 21.8 c. 326 d. 30.2

Different types of steels contain different elements that alter the characteristics of the steel. for each of the following elements, explain what the element does when alloyed with steel.