Numerade

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A researcher observes dietary habits in a group of elderly participants over a five-year period without changing their behavior. Determine whether the study is an observational study, an experiment, or a meta-analysis.

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In the given equation x2−34x+c=0, c is a constant. The equation has no real solutions if c>n.

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Which of the following statements is not true about the sinuses? Gas exchange occurs in the sinuses Sinuses are located in the skull and around the nose Sinuses help to lighten the weight of the skull Sinuses are air-filled cavities

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3. You are given the matrices: $$D = \begin{bmatrix} 2 & 2 & 1 \\ 1 & 3 & 0 \end{bmatrix}$$ $$e = \begin{bmatrix} -2 \\ 4 \\ 7 \end{bmatrix}$$ $$f = \begin{bmatrix} -1 \\ 9 \end{bmatrix}$$ $$G = \begin{bmatrix} 5 & -1 \\ 2 & 3 \\ 0 & 7 \end{bmatrix}$$ (i) What are the dimensions of D, e, f and G? (ii) Calculate De (matrix-vector multiplication); what is the dimension of De? (iii) Calculate $$f^T D$$ (vector-matrix multiplication); what is the dimension of $$f^T D$$? (iv) Calculate DG (matrix-matrix multiplication); what is the dimension of DG? (v) Calculate $$f^T De$$ (vector-matrix-vector multiplication); what is the dimension of $$f^T De$$?

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Make sure that your writing is legible, or else, please type your answers. Please include each normalization step with its justification and/or relevant dependencies as well as the resulting relational schema for each normal form (1NF, 2NF, 3NF). For each relational schema, make sure to clearly indicate PK and FKs (if any). 1. (10 points) Convert the un-normalized table below to 3NF. Assume that the DeptID and CustID are both needed to uniquely identify the date and nature of the complaint about the department. DeptID Dept. Location Mgr. Mgr. Tel CustID Cust. Date of Nature of Name Name ID Extn. Name Complaint Complaint 11232 Soap Cincinnati Mary S11 7711 P10451 Robert 1/12/2012 Poor Service Division Samuel Drumtree 11232 Soap Cincinnati Mary S11 7711 P10480 Steven 1/14/2012 Discourteous Division Samuel Parks

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Farms and ranches generally have a high rate of return on farm assets. O True False

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Question 6 (Mandatory) (10 points) In this lab, we see that a) since mechanical energy is not conserved, all the potential energy is lost to the environment b) since mechanical energy is conserved, all the potential energy at the top of the track, is converted to kinetic energy at the bottom of the track c) since mechanical energy is conserved, all the kinetic energy is converted to thermal energy d) since mechanical energy is not conserved, the speed of the skater is not related to the kinetic energy

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Determine the reaction forces, the magnitudes and the types of axial forces (T or C), given the following Warren truss. Each member length is 3m. Apply the method of sections.

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A 1/2 bridge Wheatstone circuit configuration (see figure for reference) has two strain gauges with resistance $R_g = 170 \Omega$ and gauge factor $S_g = 2.4$. Both gauges are active, but are located in opposite sides of a beam that experiences the same levels of strain on both sides, but of different sign, when loaded. The circuit is powered with a voltage $V_s = 8$ Volts. And the inactive resistors have resistance $R_2 = R_3 = 220 \Omega$. What is the strain level when the output voltage $V_0 = 0.052$ Volts? Neglect the effects of transverse sensitivity.

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QUESTION 1 Which loops cannot have an equation written directly? 6 V +1 6 k? 6 k? 6 k? 5 mA I2 6 k? I1 I0

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