Ahollow sphere of diameter 3 in. is filled with air at 200 atm, 60°f. the shell of the sphere has a mass of 0.2 lbm and is of negligible thickness. if the sphere is submerged in water at 60° f, determine the magnitude of the net vertical force, in lbf. is the force acting upward or downward? assume the air can be modeled as in ideal gas.

Adouble-strand no. 60 roller chain is used to transmit power between a 13-tooth driving sprocket rotating at 300 rev/min and a 52-tooth driven sprocket. a) what is the allowable horsepower of this drive? b) estimate the center-to-center distance if the chain length is 82 pitches. c) estimate the torque and bending force on the driving shaft by the chain if the actual horsepower transmitted is 30 percent less than the corrected (allowable) power.

Thermal stresses are developed in a metal when its a) initial temperature is changed b) final temperature is changed c) density is changed d) thermal deformation is prevented e) expansion is prevented f) contraction is prevented

Draw the engineering stress-strain curve for (a) bcc; (b) fcc metals and mark important points.