Alaboratory furnace wall is constructed of 0.2 m thick fireclay brick having a thermal conductivity of 1.82 w/m-k. the wall is covered on the outer surface with insulation of thermal conductivity of 0.095 w/m-k. the furnace inner brick surface is at 950 k and the outer surface of the insulation material is at 300 k. the maximum allowable heat transfer rate through the wall of the furnace is 830 w/m^2. determine how thick in cm the insulation material must be.

When using the ohmmeter function of a digital multimeter, the leads are placed in what position relative to the component being tested? a. parallel b. control c. series d. line

An electrical motor raises a 50kg load at a construct velencity .calculate the power of the motor, if it takes 40sec to raise the load through a height of 24m(take g =9.8n/g)

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