Consider the graph below for 3 test samples A, B and C of the same metal composition which have been cold-worked, but to different extents. If you had to sort the samples by the degree of cold-working they have undergone, how would you rank them? Stress (MPa) 600 500 400 300 200 100 OF A C. A

Question 1 Consider that you have conducted an experiment of “Tensile Test" for zinc, in which the result was collected as shown in Figure 1. Discuss the experimental result. 4000 3600 2200 2800 2400 MAK 2000 R 1600 Break 1200 MAX_D B00 400 10 12 Dap (mm) 14 Figure 1

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An electric hot water heater consumes 3.1 kilowatts of electricity and converts it to heat. How long will it take the water heater to heat a 67 gallon tank of water from 10 degrees Celsius to 50 degrees Celsius? (1 kilogram of water is 0.37 gallons, 1 Calorie = 4200 J).  It may be helpful to refer back to the weekly handout for guidance on this problem. Your final answer should be in minutes (rounded to the nearest 10 minutes).

What is the melting temperature of pure Sn?  Group of answer choices 327 °C 232 °C Cannot determine from the provided information. 183 °C

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150 N 2.0m 150 N 30 Find results of forse 50 N 100 N.m 2.0m 0.67 m B 1.0m 1.0m 65 200 N 80 N

Data taken from a tensile test is given below. The curve is linear between the origin and the first point. The gauge length is 34 mm and the cross sectional area is 12.56 mm2. Determine the modulus of elasticity. Force (N) Extension (mm) 7000 0.25 8000 0.32 8500 0.56 8500 0.7 Select one: O a. none of these options O b. 75.8 GPa O c. 109.5 GPa O d. 305 GPa O e. 201.6 MPa O f. 240 MPa O g. 86.3 GPa O h. 102 GPa