Numerade

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8. Which of the following is not an alarm initiating device? O a. detectorspark/ember detector Ob. projected beam Oc. water level switch Od. waterflow switch

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consider the titration of 742 mL of 2.07 M nitrous acid HNO2, Ka=4.0e-4 by 2.27 M KOH

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A stakeholder orientation of corporate social responsibility includes all of the following activities except A generating data about stakeholder groups B assessing the firm's effects on stakeholder groups C distributing stakeholder information throughout the firm D minimizing the influence of stakeholder information on the firm

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2) The processor market for desktop and laptop computers is dominated by ? Microsoft ? Intel ? IBM ? Apple

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Question 38 A Carnot heat engine receives heat at 480°C and rejects the waste heat to the environment at 30°C. The entire work output of the heat engine is used to drive a Carnot refrigerator that removes heat from the cooled space at 15°C at a rate of 400 kJ/min and rejects it to the same environment at 30°C. The temperature of the condenser in both cycles is 40°C. Determine: (a) The efficiency of the heat engine. (5 marks) (b) The coefficient of performance for the refrigerator. (5 marks) (c) The input power to the refrigerator (kW). (5 marks) (d) The rate of heat supplied to the heat engine (kW). (5 marks) (e) The total rate of heat rejection to the environment (kW). (5 marks) $\eta_{\text{(work produced)}} = \frac{W}{W_{\text{ideal}}}$ $\eta_{\text{(work required)}} = \frac{W_{\text{ideal}}}{W}$ $W_{\text{ideal}} = \Delta H - T_o \Delta S$ $\frac{Q_o}{T_o} = \Delta S$ $\eta_{\text{Carnot}} = 1 - \frac{T_c}{T_H}$ $\Delta S = \frac{Q}{T}$ $Q_H = Q_C + W_{\text{net}}$ $\text{COP} = \frac{Q_C}{W_{\text{net}}}$ $\text{COP}_{\text{Carnot}} = \frac{Q_C}{W_{\text{net}}} = \frac{1}{(T_H/T_C) - 1}$

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1) At a point, the normal and shear stresses acting on the plane inclined at 60 degrees CCW (Counter Clock Wise) from the horizontal are 9,000 psf compression and 1,500 psf, respectively. On the perpendicular plane the normal and shear stresses are 2,000 psf compression and -1,500 psf, respectively. a. Draw the Mohr's circle. b. Determine the value and direction of the principal stresses. c. What is the maximum shear stress at this point? 9000 psf 1500 psf 1500 psf 2000 psf 4000 Shear Stress (psf) 2000 0 -2000 -4000 -6000 0 2000 4000 6000 8000 10000 12000 Normal Stress (psf) [b) $\sigma_1$ = 9300 psf, $\sigma_3$ = 1700 psf; $\alpha$ = 48,4; c) $\tau_{max}$ = 3800

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(ii) (10 points) Find the point on the line $y = \frac{4}{3}x$ that is closest to the point (1,2)

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On April 1, 2015, Cyclone's Backhoe Co. purchases a trencher for $260,000. The machine is expected to last six years and have a salvage value of $26,000. Compute depreciation expense for both years ending December 2015 and 2016 assuming the company uses the straight-line method. Answer is not complete. Straight-line, partial-year depreciation Choose Numerator: Cost minus salvage 234,000/ Year Annual Depreciation 2015 2016 + Choose Denominator: Estimated useful life (years) Annual Depreciation Annual depreciation Depreciation Expense 39,000 X 6 Fraction of Year X 9/12 $ X 12/12

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The acacia ant / acacia plant interaction would be an example of which type of defense for plants? Multiple Choice direct chemical defense. physical defense. indirect chemical defense.

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(2) (6pts) Write (but do not evaluate) a four term Riemann Sum for the integral $\int_0^1 \sin(x) dx$. (3) (6pts) Find the area under the curve $y = 2e^x + 7$ from $x = 0$ to $x = 3$.

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dawn h.