1.A wood board with a 2in. by 4in. cross section is subjected to a tensile load of 100 lb. Determine the average normal stress and average shear stress developed in the wood fibers that are oriented at 30 degrees with the axis of the board.
2.A rigid tank contains 5kg of water at 20 degrees Celsius. A gage on the tank reads 200kPa. Determine a) the volume of the tank, b) How much would the pressure in the tank increase if the temperature were increased to 50 degrees Celsius. c) A piston reduces (isentropically) the volume of the tank of half its initialvalue. How much id the pressure in the tank expected to increase? ( assume initial temp. 20 degrees)