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sarah romero

sarah r.

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Which hypothesis best explains the east-west gradient of type-B blood frequencies found in modern European populations? Childe's hypothesis Lucifer's demonic suffusion hypothesis Two of these explain this genetic gradient equally well. Cavalli-Sforza's demic diffusion hypothesis

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18. For the reaction N$_2$O$_4$(g) $\rightleftharpoons$ 2 NO$_2$(g), $\Delta H^\circ$ = +57.2 kJ/mol and K = 0.113 at 25 °C, what is the value of A. K at 0 °C (report your answer using scientific notation) B. At what temperature will K = 1.00?

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What are greedy Jobs ? What is their role job discrimination for mothers?

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A fiscal policy that reduces taxes or increases government spending will cause a(n) A decrease in real GDP and a decrease in the price level. B increase in real GDP and an increase in the price level. C increase in real GDP and a decrease in the price level. D decrease in real GDP and an increase in the price level.

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In a contestable market the Herfindahl-Hirschman Index is ________ and the market behaves as if it is ________. high; a monopoly low; a monopoly high; perfectly competitive low; perfectly competitive zero; perfectly competitive

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On the following graph, the economy is producing at point A (grey star symbol), which corresponds to the intersection of the AD? and SRAS? curves. The Federal Reserve ("the Fed") is considering whether to intervene in an effort to bring the economy back to its potential. PRICE LEVEL LRAS SRAS? 165 160 155 150 145 140 135 130 125 10 12 14 16 18 20 22 24 26 REAL GDP (Trillions of dollars) No Intervention If Fed Intervenes SRAS? AD? AD? In this economy, the Natural Real GDP is Since Real GDP is currently $22 trillion (as shown by point A), this level of output means there is currently of

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The most obvious assumption of the Lotka-Volterra Model, which is slightly problematic is: It assumes there are no niche differences between species It assumes that intraspecific and interspecific competition are the same It assumes that competitors are predators It assumes that competitors are herbivores

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cross the 3 A current source (polarity: + on left side). Solve for the same voltage and compare with your hand calculat mu need a ground connection - put ground at the bottom node. e power supplied by the 3 A source and compare Spice and hand c (using the DC sweep command), where $I_s$ replaces the 2 A cur same polarity) and varies from -40 to 40 amps. For what range sorbing power? Why - what is going on to cause this? it of Fig. 4.66 shown below. $7\Omega$ $+$ $9V$ $0.2i_x$ $+$ $7\Omega$ $1\Omega$ $+$ $4\Omega$ $0.1v_a$ $4\Omega$

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Chapter 10: Phase Transformations Consider an isothermal transformation diagram for an iron-carbon alloy (eutectoid composition). Describe a time-temperature path that might be used to obtain a microstructure consisting of 50% fine pearlite, 25% bainite, and 25% martensite. For each stage of the path, please state a general rate of cooling, approximate temperature, and hold time, as applicable (e.g., cool rapidly to -°C, hold for - seconds, ...). Attention for check: For an iron-carbon phase diagram, one could refer to one of the following: Fig. 9.24 from the textbook (e.g. 7th to 10th edition) Textbook Callister, William D. & Rethwisch, David G. (2018). Materials Science and Engineering: An Introduction, 10th Edition Hoboken, NJ: Wiley.

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1. For the following RLC circuit, the load is represented as L1 and R2 (in parallel). C1 R1 40 100 L1 R2 200 V1 220 Vrms 60 Hz (a) Calculate load impedance $Z_L$ phasor (you need to provide amplitude and angle): (b) Calculate total circuit impedance $Z_T$ phasor: (c) Calculate total line current $I_T$ phasor that first ammeter (XMM1) indicates. (d) Calculate the voltage across the load. (e) Calculate power values total active (P, Watts), reactive (Q, VAr) and apparent (S, VA). Indicate power factor $pf = cos\phi$ ? (Ind or Cap?)

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