Numerade

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Thomas Edison contributed greatly to radiology by: Question 4Select one: a. discovering radium b. discovering the use of calcium tungstate c. discovering radioactivity d. developing the valve tube

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Sketch a graph of $ f $ and use it to make a conjecture about the values of $ f(a) $, $ \qquad $ \[ \mathrm{x} \rightarrow \mathrm{a}^{-} \] $ \lim f(x) $, and $ \lim f(x) $, or state if they do not exist. \[ \begin{array}{l} x \rightarrow a^{+} \quad x \rightarrow a \\ f(x)=\frac{x^{2}-25}{x+5}, a=-5 \end{array} \] Sketch a graph of $ f $ Choose the correct graph below. A. B. C. D. Make a conjecture about the value of $ f(-5) $. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. A. The value of $ f(-5)= $ $ \square $ - (Type an integer or a decimal.) B. The value of $ f(-5) $ does not exist.

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Conventional explosive devices include All EXCEPT ◻ A) grenades B) missiles C) bombs D) IED's

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During the financial crisis of 2007-2009, the Fed deviated from the Taylor rule in two significant ways. From June 2007 to April 2008, the Fed deviated from the Taylor rule by _____; after the fall of 2008, the Fed deviated from the rule by _____ a. raising interest rates above the Taylor rule; cutting interest rates below the Taylor rule b. raising nominal interest rates; cutting nominal interest rates c. allowing inflation to rise; allowing interest rates to rise d. cutting interest rates below the Taylor rule; not cutting interest rates because they were at a zero bound

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Q39 The reaction below shows the reaction that occurs when TNT ($C_7H_5N_3O_6$) is used to demolish an old building. How many grams of carbon (C) will be produced when 5.00 moles of hydrogen ($H_2$) are also produced? (C4; ES15) Reaction: 2 $C_7H_5N_3O_6$ (s) $\rightarrow$ 12 CO (g) + 5 $H_2$ (g) + 3 $N_2$ (g) + 2 C (s) Given: Molar Masses = $C_7H_5N_3O_6$ (TNT) = 227.15; CO = 28.01; $H_2$ = 2.02; $N_2$ = 28.02; C = 12.01 * (1 Point)

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Healthcare-associated Pneumocystis jiroveci, S. pyogenes, Mycoplasma, Multiple antibiotics, Fungal, S. pneumoniae, Protozoan, Surgical intervention, polymicrobial infections, Bacterial, Legionella sp., "walking pneumonia", Viral, SARS, Pneumonia, Histoplasma capsulatum caused by Transmitted through aspiration in patients, Prevention through proper patient positioning treatment.

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E. coli is grown aerobically to produce the enzymes Î²-lactamase and catechol 2,3-dioxygenase. The cells are immobilized in spherical beads of carrageenan gel. The effective diffusivity of oxygen is 1.4x10^-9 m^2/s. Oxygen uptake is zero-order with an intrinsic rate constant of 10^-3 mol/s/m^3 of particle. The concentration of oxygen at the surface of the catalyst is 8x10^-3 kg/m^3. Assume negligible cell growth. (a) What is the maximum particle diameter for aerobic conditions throughout the catalyst particles? (10 points) (b) For particles half the diameter calculated in (a), what is the observable Thiele modulus? (5 points) (c) The density of cells in the gel is reduced by a factor of five. If the specific activity of the cells is independent of cell loading, what is the maximum particle size for aerobic conditions? (5 points)

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Demand Forecast A company has the following demand forecast next year, expressed in six bimonthly (2-month) periods in this table: Forecast Demand Period (Standard Units of Work) 1 400 2 380 3 470 4 530 5 610 6 500 The following costing data have been obtained: • Each employee works 160 regular working hours per month • Each unit requires 20 standard hours to produce • The labour costs are $6 per normal hour and $9 per overtime hour • It costs $3 per month to hold an item in inventory Notes: Use the following rules in rounding off the number of employees: If the decimal is 0.5 or more, round up, e.g. round 32.6 to 37 If the decimal is less than 0.5, round down if the number of employees is decreasing, i.e. lower than the previous period. If the decimal is less than 0.5, round up if the number of employees is increasing, i.e. higher than the previous period. Question 3 The company wants to determine the cost of meeting the demand by using a mixed strategy which involves changes in the number of employees and the use of overtime work. To keep from adding too many temporary employees during the peak demand period, the company will use overtime equal to up to 25 percent of the regular-time hours available. The company has 22 employees at the end of the current year (i.e. at the beginning of period 1 of the following year which is being planned), and wants to end period 6 of the planning year with the same number of employees, i.e. 22 employees. It costs $400 to hire and $500 to lay off an employee. The company begins the planning year with no inventory. If at least 50% of a new employee's regular-time capacity could be utilized during the current period as well as the next period, it will add an employee, otherwise overtime will be used. The company will continue to add employees as required until the maximum employment level as dictated by the constraint of using overtime subject to a maximum of 25 percent of regular-time hours during the peak period, i.e. period 5. Once the maximum employment level is reached, overtime will be used and no more employees are added. a) Find the employment level for each bimonthly period. b) Find the total payroll-related costs for the year. c) What cost per unit results from these payroll-related costs? (Ans. $126 per unit)

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Question 4 For the three-leg converter supplying a three-phase load (Y-connected) as in figure below, the load phase voltages ($v_{1}^Y$, $v_{2}^Y$, and $v_{3}^Y$) can be written as a function of the state of the switches $q_1$, $q_2$ and $q_3$, as following $v_{1}^Y = [rac{2}{3}q_1 - rac{1}{3}q_2 - rac{1}{3}q_3]V_{dc}$; $v_{2}^Y = [-rac{1}{3}q_1 + rac{2}{3}q_2 - rac{1}{3}q_3]V_{dc}$; $v_{3}^Y = [-rac{1}{3}q_1 - rac{1}{3}q_2 + rac{2}{3}q_3]V_{dc}$ Write the voltages $v_{11}$, $v_{12}$ and $v_{13}$ as a function of the states of the switches for a three- phase load connected in delta.

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Problem 1 (10 Points) Write down your detailed design philosophy (i.e. road map) for the selection of a synchronous belt drive.

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vincent h.