Measurements should be reported to the nearest 1000, 100, 10, 1, 0.1, 0.01,0.001 units, etc., depending on their variability and intended use. Using your best judgment, how should the following measurements be reported?a. Deformation of a steel specimen during the tension test (mm)b. Tensile strength of steel (MPa)c. Modulus of elasticity of aluminum (MPa)d. Weight of aggregate in a sieve analysis test (grams)e. Compressive strength of portland cement concrete (MPa)f. Moisture content in a concrete masonry unit (percent)g. Asphalt content in hot-mix asphalt (percent)h. Specific gravity of woodi. Distance between New York City and Los Angeles (km)j. Dimensions of a computer microchip (mm)

The stress-strain diagram for a steel alloy having an original diameter of 0.5 in. and a gage length of 2 in. is given in the figure. If the specimen is loaded until it is stressed to 70 ksi, determine the approximate amount of elastic recovery and the increase in the gage length after it is unloaded. o (ksi) 80 70 60 50 40 30 20 10 e (in./in.) 0 04 0.08 0.12 0.16 0.20 0.24 0.28 0 0005 0.0010.0015 0.002 0.0025 0.0030.0035

2. A cube made of an alloy with dimensions of 50mmx50mm×50mm is placed into a pressure chamber and subjected to a pressure of 80 MPa. If the modulus of elasticity of the alloy is 200 GPa and Poisson's ratio is 0.30, what will be the length of each side of the cube, assuming that the material remains within the elastic region?

Measurements should be reported to the nearest 1000, 100, 10, 1, 0.1, 0.01, 0.001 units, etc., depending on their variability and intended use. Using your best judgment, how should the following measurements be reported? Deformation of a steel specimen during the tension test (in.) Tensile strength of steel (psi) Modulus of elasticity of aluminum (MPa) Weight of aggregate in a sieve analysis test (grams) Compressive strength of portland cement concrete (psi) Moisture content in a concrete masonry unit (percent) Asphalt content in hot-mix asphalt (percent) Specific gravity of wood Distance between New York City and Los Angeles (miles) Dimensions of a computer microchip (mm)

The stress-strain diagram for a metal alloy having an original diameter of 16 mm and a gauge length of 300 mm is given in the figure. Determine approximately the modulus of elasticity for the material, the load on the specimen that causes yielding, and the ultimate load the specimen will support. a (MPa) 700 600 500 400 300 200 100 € (mm/mm) 0 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.001 0.002 0.003 0,004 0,005 0.006 0,007

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A round steel alloy bar with a diameter of 19mm and a gauge length of 76mm was subjected to tension, with the results shown in Table. Using a computer spreadsheet program, plot the stress–strain relationship. From the graph, determine the Young’s modulus of the steel alloy and the deformation corresponding to a 37kN load.

A brass alloy rod having a cross sectional area of 0.24 in.2and a modulus of 16 * 106 psi is subjected to a tensile load. Plastic deformation was observed to begin at a load of 8,944 lb.a. Determine the maximum stress that can be applied without plastic deformation.b. If the maximum length to which a specimen may be stretched without causing plastic deformation is 3.28 in., what is the original specimen length?