Which statement about tensile stress is true? O A.
Forces that act perpendicular to the surface and pull an object apart exert a tensile stress on the object.
OB
Forces that act perpendicular to the surface and squeeze an object exert a tensile stress on the object.
C.
Forces that act parallel to the surface exert a tensile stress on the object.
D.
Forces that decrease the length of the material exert a tensile stress on the object.

Explain the difference laminar and turbulent flow. explain it with the shear stress and the velocity profiles.

Acompressor receives the shaft work to decrease the pressure of the fluid. a)- true b)- false

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.