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felix rojas

felix r.

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Based on the data shown below, calculate the correlation coefficient (rounded to three decimal places) x y 5 49.96 6 47.07 7 44.48 8 43.69 9 41.4 10 39.01 11 33.72 12 33.13 13 31.24 14 25.95 15 25.96 16 22.27 17 19.18 18 14.89 19 14.3

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A student is investigating osmosis. She sets up an experiment as shown below, putting a different concentration of sucrose solution into each beaker. She put the same concentration of sucrose solution (0.2M) into each length of Visking tubing (Visking tubing refers to an artificial membrane tubing that acts as a plasma membrane.). glass tube Visking tubing containing 0.2 M sucrose solution sucrose solution A B C The student records the level of the sucrose solution in each beaker at the start of the experiment and then again after 4 hours. Here results are shown in the table below. Beaker Change in level of sucrose solution in beaker (mm) A +3 B 0 C -2 (1) Use information from the table to match which beaker (A, B or C) contained the following concentration of sucrose solution 1) 0.2M 2) 0.0M 3) 0.8M (2) Give two variables that need to be kept constant in this experiment.

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How many moles of O2 would be needed to react with 4.04 moles of CS2 in the reaction CS2 + 3 O2 ———> CO2 + 2 SO2

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Multiple Choice Question If you decide to list merchandise on eBay for someone to buy, you can best be described as what? O Sales associate O Buyer O Seller O Purchaser

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Which one of the following is subjective? Group of answer choices predictor variables input variables output variables

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The supply curve indicates which of the following? the highest price a consumer is willing to pay for a good the marginal benefit the marginal cost of a good the total benefit from a good

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Student Number: Time : 20 Minutes Question: Question: A truss subjected to a force of P = 50kN at joint C as shown in the figure. Answering the following questions: a) Determine the average normal stress developed in the 20 mm diameter bar AC. b) Determine the average shear stress developed in the 30 mm diameter pin A that is subjected to double shear.

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A material has a 50 MPa stress applied, causing Mode 1 loading on an existing center crack. What is the stress intensity at the tip of the center crack (not an edge crack) that is 3mm long. The shape factor (Y) can be considered to be 1.12.

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G1 R(s) + + + C(s) G2 G5 G6 + + G3 G4 G7

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Given the element equations derived in class for the 2-node beam element as follows: [12 6L 12 6L V1 EI 79 412 6L 212 L3 12 79 12 6L V2 6L 212 6L 412 $2 fi m1 fz m2 Consider the beam shown in Figure 1. y,v(x) 2 3 Figure 1. with E=210 GPa, I=2.10^-4 m^4, L=3m, and P=50 kN Write down the boundary conditions (known DOFs). Write down the reduced global matrix system of equations including the force vector. Solve for the unknown displacements and rotations at nodal positions. (10 pts)

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