An airplane weighing 8,000 lb has an upward acceleration of 3g when landing. Ma 24,000 Ib A W-8,000 lb A 240" HR2 .--- a) If the dimensions are as shown, what are the wheel reactions R1 and R2? b) What time is required to decelerate the airplane from a vertical velocity of 12 ft/sec? c) What is the shear and bending moment on a vertical section AA, if the weight forward of this section is 2,000 lb and has a center of gravity 40 in. from this cross section?

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Chemical and Phase Equilibrium

Phase diagrams or equilibrium phase diagrams are the graphical representations that show the phase transformations of the constituting elements with respect to the pressure, temperature, and compositions. The diagrams show the conditions that limit the different phases, namely solid, liquid, and gas. The diagram can also be utilized to verify the relations between the state variables. Most of the phase diagrams are temperature-pressure phase diagrams, with the variable parameter as the composition. Usually other variables such as solubility and pressure parameters are not indicated in the phase diagram. For a one-component system (unary phase diagram), the phase diagram is generally a function of temperature and pressure as the state variables, or temperature and volume. However, for a binary system (two-phase) having two components, the phase diagram is a function of temperature and composition as the state variables only. Coexisting of the different phases of the constituting elements is indicated in the phase diagram. A ternary phase diagram can be characterized by consisting of three phases in equilibrium.