The slotted arm OA rotates about a fixed axis through O. At the instant under consideration, θ = 20°, θ˙ = 50 deg/s, and θ¨ = 21 deg/s2. Determine the magnited of the force F applied by arm OA and the magnitude of the force N applied by the sides of the slot to the 0.4-kg slider B. Neglect all friction, and let L = 0.42 m. The motion occurs in a vertical plane

How to increase the thermal officiency of an ideal simple rankino cycle? among these methods, which one is the best and why?

With increases in magnification, which of the following occur? a. the field of view decreases. b. the ambient illumination decreases. c. the larger parts can be measured. d. the eyepiece must be raised.

On solidification from a melt, the polymer polyethylene forms a semi-crystalline spherulite structure. (i) sketch an individual spherulite and label the amorphous and crystalline regions. (ii) draw a schematic to show the changes in specific volume with temperature during cooling from the melt, comparing it to the theoretical extremes of fully crystalline and fully amorphous (indicate tm and tg)