A driver accidentally bumped a fire hydrant creating a bending moment of 715 N·m in the pipe below. The pipe has an inside diameter of 200 mm and a wall thickness of 8 mm and is pressurized to 355 kPa. Determine the largest normal stress along the length of the pipe.

A simply supported beam with dimensions of b = 18 in., h = 26 in., d = 23.5 in., and L = 23 ft supports a uniform service (unfactored) dead load of 2.1875 kips/ft including its own self weight plus a uniform service (unfactored) live load of 1.5 kips/ft. The beam is reinforced with two No. 7 Grade 60 bars. The concrete strength is 9,100 psi (normal weight). The beam has Grade 60 No. 3 stirrups. Using the effective moment of inertia, determine the immediate mid-span deflection of the beam due to the combined service loads (dead plus live).The effective moment of inertia Ie = 5,684.4 in.4.

Compute the maximum bar spacing, s, to control for cracks in a one-way slab with 1.6 in. of clear cover and f​y​ = 60 ksi.

Force P = 49 N is applied to a lever at the end of a 32-mm-diameter shaft. Force Q = 135 N is applied directly to the shaft. Determine the normal stress σy at point H. Let a = 140 mm and b = 230 mm.

The primary mechanism of action of pimecrolimus (elidel) for atopic dermatitis is:

A bacterial sample from a patient was gram stained using standard protocol.  The results of the gram stain showed pink rods and purple circles under the microscope.  If you were to streak this patient sample on nutrient agar plates to isolate colonies, which of the following, plate A or plate B, would best represent the sample?  

A simply supported beam with dimensions of b = 16 in., h = 28 in., d = 25.5 in., and L = 24 ft supports a uniform service (unfactored) dead load of 1.966667 kips/ft including its own self weight plus a uniform service (unfactored) live load of 1.3 kips/ft. The beam is reinforced with four No. 6 Grade 60 bars. The concrete strength is 8,200 psi (normal weight). The beam has Grade 60 No. 3 stirrups. Determine the effective moment of inertia, Ie.The cracked moment Mcr = 118.3 kip-ft, and the maximum applied bending moment due to the combined service loads (dead plus live) Ma = 235.2 kip-ft. The neutral axis location of the cracked beam (measured from the top of the beam) is 5.0301 in.

A rectangular beam has a cross section of b = 16 in., h = 24 in., and d = 21.5 in. It is reinforced with four No. 5 Grade 60 bars. The concrete strength is 9,400 psi (normal weight). The beam has Grade 60 No. 3 stirrups. Determine the modulus of rupture of the concrete, fr.

A rectangular beam has a cross section of b = 18 in., h = 26 in., and d = 23.5 in. It is reinforced with three No. 6 Grade 60 bars. The concrete strength is 2,800 psi (normal weight). The beam has Grade 60 No. 3 stirrups. Determine the cracked moment of inertia, Icr. The neutral axis location of the cracked beam (measured from the top of the beam) is 5.0946 in.

A rectangular beam has a cross section of b = 14 in., h = 22 in., and d = 19.5 in. It is reinforced with two No. 8 Grade 60 bars. The concrete strength is 7,000 psi (normal weight). The beam has Grade 60 No. 3 stirrups. Determine the gross moment of inertia, Ig, for the beam.