Consider a single crystal of some hypothetical metal that has the bcc crystal structure and is oriented such that a tensile stress is applied along a [121] direction. if slip occurs on a (101) plane and in a direction, compute the stress at which the crystal yields if its critical resolved shear stress is 3.0 mpa.

Fluids at rest possess no flow energy. a)- true b)- false

Water in a partially filled large tank is to be supplied to the roof top, which is 8 m above the water level in the tank, through a 2.2-cm-internal-diameter pipe by maintaining a constant air pressure of 300 kpa (gage) in the tank. if the head loss in the piping is 2 m of water, determine the discharge rate of the supply of water to the roof top in liters per second.

Shafts are machine elements that are used to a) carry axial loads b) direct shear loads c) transmit power d) rotate at constant speed e) none of the above circular and square shafts subjected to the same torque under the same circum behave a) the same way b) almost the same way