N epoxy matrix is reinforced with 40 E-glass fibers to produce a 2--diameter composite that is to withstand a load of 25,000 that is applied parallel to the fiber length. Calculate the stress acting on each fiber. The elastic modulus for the epoxy is 2.7610 and that for the E-glass is 72.410 . (Enter your answer to three significant figures.)

Asolid cylinder is concentric with a straight pipe. the cylinder is 0.5 m long and has an outside diameter of 8 cm. the pipe has an inside diameter of 8.5 cm. the annulus between the cylinder ad the pipe contains stationary oil. the oil has a specific gravity of 0.92 and a kinematic viscosity of 5.57 x 10-4 m2/s. most nearly, what is the force needed to move the cylinder along the pipe at a constant velocity of 1 m/s?