Numerade

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Which parts of Luc De Meester's 1996 studies provided evidence that phototactic behavior of Daphnia is phenotypically plastic? A. He tested their phototactic behavior in water that fish had lived in and in water that had never contained fish, and the Daphnia acted differently in the different types of water. B. He tested Daphnia hatching from resting eggs from the bottom of one pond that came from different time periods, and found that they differed in their phototaxis. C. He tested Daphnia from two different ponds and found a difference in their phototactic behavior. D. The Daphnia from the pond with fish predation showed a lot less positive phototaxis so they could avoid predation.

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what is the lewis structure for a hydrogen flouride molecule (HF)?

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$7900 is invested for two years at a rate of 6% per year, compounding annually.

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How does an induction motor create motion? Why is that relevant to an MRT? 2. What is the purpose of a generator? How is direct current created?

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This naturalist compared elephant fossils to the skeletons of living elephants from Africa and India, which helped establish that many fossils were remains of extinct species. This naturalist discovered spectacular fossils of marine reptiles and other strange animals, which supported the idea that species do become extinct.

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16. Suppose the price elasticity of demand for heating oil is 0.2 in the short run and 0.7 in the long run. If the price of heating oil rises from $1.80 to $2.20 per gallon, what happens to the quantity of heating oil demanded in the short run? In the long run? (Use the midpoint method in your calculations.) Why might this elasticity depend on the time horizon?

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The heat capacity of solid lead oxide is given by $C_{p,m} = 44.35 + 1.47 \times 10^{-3} \frac{T}{K}$ in units of J$\cdot$K$^{-1}\cdot$mol$^{-1}$ Part A Calculate the change in enthalpy of 2.25 mol of PbO(s) if it is cooled from 767 K to 279 K at constant pressure. Express your answer with the appropriate units. $\Delta H = $ Value Units

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Q11: A balanced three-phase Y-connected load has an impedance of 12+j9 ohm per phase. The load is connected to a three-phase supply line having a line-to-line voltage of 208 V, as shown in the figure. Assume we use $\vec{V_{AB}}$ as the reference phasor. (a) Calculate the phase voltage $\vec{V_A}$, $\vec{V_B}$, $\vec{V_C}$ (b) Calculate the phase current $\vec{I_A}$, $\vec{I_B}$, $\vec{I_C}$ (c) Calculate the average power (real power) associated with each phase (d) Calculate the total average power delivered to the load

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For each of the rotational mechanical system, just write the equation of motion in the time domain.

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2. An amplifier with a gain of 2.0 is shown. The input signal is $v_{in}(t) = (5V)sin((60\pi)t + 28^\circ)$. The source voltage is 8.0 V. What is most nearly the output voltage at $t = 0.025 s$? (A) -8.8 V (B) -8.0 V (C) -4.4 V (D) 8.0 V

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adam w.