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Fatigue crack growth thresholds can be determined much more quickly using ultrasonic loading devices than with conventional servo hydraulic test machines. If the fatigue test in the previous problem were to be conducted under ultrasonic loading at a frequency of 15 000 Hz, estimate the amount of time required to determine the fatigue threshold. Discuss the advantages and disadvantages of the ultrasonic test method over those of the conventional test method.
Question about Spring, A 37kg object is placed onto a coil spring which has been compressed 43mm. The force used to compress the spring was 35KN.
Discuss scales and sludges - Write a note on internal treatment of water
Calculate the distance d from the center of the earth at which the force on a particle from the moon is equal to 1.49 times the force on the particle from the earth. The particle is restricted to the line through the center of the earth and the mo..
If variable Test(i,j) is selected so the first column represents the student number (1,2,..., 32), 2nd column represents the score of the first homework, 3rd column represents the score of the 2nd homework, etc.
The propellers of a ship are connected to an A-36 steel shaft that is 60m long and has an outer diameter of 340mm and inner diameter of 260mm
Tensile testing of human cortical bone is conducted to obtain the elastic moduli. The cross-sectional geometry of bone varies along its length, although the cross-section can be approximated as hollow and circular,
You are an environmental scientist who has been hired to assess the damge caused by an accident in which an eyeglass lens manufacturer, located on a river, released acetone directly into the water. Fortunately, only one 5.0-L bottle was released. The..
What are the five branches of transportation engineering?
Determine the elastic and plastic section modulus of the I-beam. The axis runs through the center of the beam on both x and y axis (completely symmetrical). Beam properties: h= 12inches tf= 0.5 inches bf= 6 inches tw= 0.25 inches
A trapezoidal channel with a bottom width of 4 feet and side slopes 2:1 (H:V) and a bed slope of 1 percent conveys a discharge of 50,000 gpm. Assume n = 0.025. Compute the normal depth
One mole of an ideal monoatomic gas initially at 300 K is expanded from an initial pressure of 10 atm to a final pressure of 1 atm. The molar heat capacity for constant volume for the gas is Cv = 3/2 R .
Water flows through 800 feet of 12-inch diameter iron pipe (g = 0.0018 inches) between 2 open storage tanks, whose water surface elevation difference is 16 feet. The pipe entrance is flush and square edged
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