The frame is used to support a load of sand that weighs 70 lb. the sand hangs from a cable that passes around a frictionless pulley (radius = 0.5 ft) at d and is anchored to the wall. the structure is rigidly attached to the wall at c, and pinned connections exist at joints a, b, d, and e. determine the forces at a and the force(s) in link be.

An ideal otto cycle with air as the working fluid has a compression ratio of 8. the minimum and maximum temperatures in the cycle are 300 k and 1340 k. use constant specific heats at room temperature to determine (a) the amount of heat transferred to the air during the heat- addition kj/kg, (b) the thermal efficiency, and (c) the thermal efficiency of a carnot cycle ope limits. process, in rating between the same temperature

Amixture of slurry and mud is to be pumped through a horizontal pipe of diameter 500 mm. the fluid behaves as a bingham plastic with a yield stress of 30 pa and viscosity 0.04 pa.s. describe the effects of the shear stress through a transverse section of the pipe by plotting the variation in shear stress and velocity profile: (i) just before the slurry starts to move (ii) as the slurry flows when the pressure gradient is double that in part (i)

The proportional limit is always greater than the yield strength for a material. a)-trune b)- false