Consider a concentric tube heat exchanger with an area of 50 m2operating under the following conditions:Hot fluidCold fluidHeat capacity rate, KW/K63Inlet temperature, oC6030Outlettemperature, oC-54(a) Determine the outlet temperature of the hot fluid.(3points)(b) Is the heat exchanger operating in counter flow or parallel flow, or can't you tell from the available information

Afour cylinder four-stroke in-line engine has a stroke of 160mm, connecting rod length of 150mm, a reciprocating mass of 3kg and its firing order is 1-3-4-2. the spacing between cylinders is 100mm. i. show that the engine is in balance with regard to the primary inertia forces and primary 3. a and secondary inertia couples. li determine the out of balance secondary inertia force ii. propose ways of balancing this out of balance force and discuss the challenges that will arise

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.

Thermal stresses are developed in a metal when its a) initial temperature is changed b) final temperature is changed c) density is changed d) thermal deformation is prevented e) expansion is prevented f) contraction is prevented