Asolid rectangular simply supported timber beam 6 in wide, 24 in deep, and 12 ft long carries a concentrated load of 20,000 lb at mid-span. calculate the shear stress 6 in above and below the neutral axis. neglect the weight of the beam.

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

Steel is coated with a thin layer of ceramic to protect against corrosion. what do you expect to happen to the coating when the temperature of the steel is increased significantly? explain.

Abrake has a normal braking torque of 2.8 kip in and heat-dissipating cast-iron surfaces whose mass is 40 lbm. suppose a load is brought to rest in 8.0 s from an initial angular speed of 1600 rev/min using the normal braking torque; estimate the temperature rise of the heat dissipating surfaces.