Find the convection coefficient (h) associated with airflow over the surface of a thick, stainless steel casting, thermocouples are inserted into the casting at distances of 10 mm and 20mm from the surface along a hypothetical line normal to the surface. the steel has a thermal conductivity of 15 w/m-k. the thermocouples measure temperatures of 500 and 40°c in the steel when the air temperature is 100°c.

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