Numerade

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Multiple Choice Question Nickolas Cottrell (1968) compared the performance of participants on well-practiced tasks in front of either a standard audience or a blindfolded audience. The blinded audience O did not enhance performance O tripled performance O doubled performance

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Nitrifying bacteria..... oxidize nitrite ($NO_2^-$) into nitrate ($NO_3^-$) form ammonium ($NH_4^+$) from nitrogen gas ($N_2$) and hydrogen ($H_2$). reduce nitrate ($NO_3^-$) to form nitrogen gas ($N_2$). remove amine groups from amino acids so that amino acids can be used in central catabolism. oxidize ammonium ($NH_4^+$) into nitric acid ($HNO_3$).

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Which of the following information must not be given out when responding to a request for credit information on a patient? the highest amount that the account ever reached how long the patient has had an account your opinion about the patient's ability to pay you may give any information that is requested the current balance on the patient's account

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Consider a concentric tube heat exchanger where both fluids are subject to sensible heat transfer. Based on the data available for each of the five scenarios below, select the option(s), where the log mean temperature difference approach can be used to determine the heat exchanger UA value (U·A): a) b) c) d) e) Thi, Tho, To, mh, me, Cph, Gpo Thi, Tho, Ti, Too, mh, Cph Thi, Tho, Toi, mh, Cph Thi, Ti, mn, mo, Cph, Cp.c

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Use the change-of-base theorem to find the logarithm.\\ $\log_4 5$ \\ $\log_4 5 = $\\ (Simplify your answer. Do not round until the final answer. Then round to four decimal places as needed.)

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Suppose you are integrating over the region $R$ shown above, which is the region bounded by $y = x^2$ and $y = 2x$. Integrating first with respect to $x$, then with respect to $y$, can be represented with drawing horizontal rectangles on your region. Doing this, you can see that ___ $\leq x \leq$ ___ , and ___ $\leq y \leq$ ___. Integrating first with respect to $y$, then with respect to $x$, can be represented with vertical rectangles on your region. Doing this, you can see that ___ $\leq y \leq$ ___ , and ___ $\leq x \leq$ ___.

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Question 2 Not yet answered Marked out of 1 Flag question \lim_{x \to 3} \frac{\sqrt{x^2 - 9}}{x + 3} = Select one: a. 6 b. $-\infty$ c. 0 d. does not exist

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DC Voltage Measurement The circuit in Figure 1 shows the voltage of a power supply ($V_s$) being measured with an ideal multimeter. In this circuit, the \"device under test\" (DUT) is the resistor $R_s$. Assume a DC power supply of 1.5 V. $V_s$ $R_s$ HI O Ideal Meter $V_s$ = ideal DUT voltage $R_s$ = DUT source resistance LO O Figure 1. Ideal voltmeter circuit configuration for measuring an unknown resistance, $R_s$. 2) For the circuit shown in Fig 1, what is current I? We live in the real world, where ideal voltmeters do not exist. In order to get a voltage reading, a current must flow through the meter, albeit an extremely small one. We account for this by introducing an input impedance, $R_i$, into the circuit model, as shown in Figure 2. $R_s$ HI O $V_s$ $R_i$ Ideal Meter $V_s$ = ideal DUT voltage $R_s$ = DUT source resistance $R_i$ = multimeter input resistance (10 M$\Omega$ or >10 G$\Omega$) 100 x $R_s$ $\rightarrow$LO O Error (%) = $R_s$ + $R_i$ Figure 2. Realistic voltmeter circuit configuration. 3) Use the spec sheet in appendix 2 to find the multimeter's input impedance in voltmeter mode. 3.1) Multimeter input impedance $R_i$= 3.2) For the circuit shown in Figure 2, what is current I?

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Question-3 (Figure-2) A pair of thyristors connected in inverse-parallel, as shown in Fig.2, is used to supply adjustable current to a restive load of R = 20 $\Omega$. If the supply voltage is $v_s = 240 \sin\omega t$ and the thyristors are each triggered at an angle $\alpha$ after their respective anode voltage zeros. For a value of $\alpha = 60^\circ$, For this circuit choose the following correct answers: The r.m.s value of the load output voltage VL is : (3 Points) 312.76 V 217.16 V 152.21 V 98.34 V

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Problem 3 (25 points): The state of plane stress at a point on the surface of the train represented on the element oriented as shown in figure. Using the Morh's circle to determine: a) the stress on all face of aa/bb planes, aa plan is 90 degree with bb plan b) Determine the principal stress c) Determine the maximum shear stress Sketch all above on the properly oriented elements

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clayton k.