"given a nodal delay of 84.1ms when there is no traffic on the network (i. e. usage = 0%), what is the effective delay when network usage = 39.3% ? (give answer is miliseconds, rounded to one decimal place, without units. so for an answer of 0.10423 seconds you would enter "104.2" without the qu"

Steel balls 12 mm in diameter are annealed by heating to 1150 k and then slowly cooled to 400 k in an air att 325 k and h -20 w/m2 k. assume the properties of the steel to be k- 40 w/m k, p 7800 kg/m3, and cp 600 j/kg k. a. determine whether lumped system method can be used to analyze this problem and if so why" b. determine the time required for the cooling process. c. determine the total amount of heat lost from each ball to the ambient air