Numerade

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For a least-squares regression line $\hat{y} = b_0 + b_1x$, the residual for the point $(x, y)$ is ____. O $x-y$ O $y-x$ O $\hat{y}-y$ O $y-\hat{y}$

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Predict the sign of ΔS for each of the following processes, which occur at constant temperature. I.The volume of 2.0 moles of O2(g) increases from 44 L to 52 L. II.The pressure of 2.0 moles of O2(g) increases from 1.0 atm to 1.2 atm. Question 7Answer a. I: ΔS = positive; II: ΔS = positive b. I: ΔS = negative; II: ΔS = negative c. I: ΔS = positive; II: ΔS = negative d. I: ΔS = negative; II: ΔS = positive

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f-2.5.-15

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in unit vector notation what is the sum a + b if a = (4.0m)i + (3.0m)k

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Convert 34% to a decimal. Round your answer to 2 decimal places.

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Refer to Exhibit 20-2. The market for good X is initially in equilibrium at $5. The government then places a per-unit tax on good X as shown by the shift of S1 to S2. What is an expression for the tax revenue raised?

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Price Level P1 0 AD? AD? AS Q? Q? Q? Real Domestic Output In the accompanying figure, if AD? shifts to AD?, the full multiplier effect would be an increase in real GDP from Multiple Choice Q? to more than Q?. Q? to Q?.

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1) Based on the following thermochemical equation, 2 HF (g) ? H$_2$ (g) + F$_2$ (g) ?H = +536 kJ what is the enthalpy change for the reaction indicated below? 2 H$_2$(g) + 2 F$_2$ (g) ? 4 HF (g) ?H = kJ 2) Two thermochemical equations are listed below. P$_4$ (s) + 3 O$_2$ (g) ? P$_4$O$_6$ (s) ?H = -1641.5 kJ P$_4$ (s) + 5 O$_2$ (g) ? P$_4$O$_{10}$ (s) ?H = -2940.1 kJ Based on this information, what is the enthalpy change for the following reaction? P$_4$O$_6$ (s) + 2 O$_2$ (g) ? P$_4$O$_{10}$ (s) ?H = kJ

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QUESTION 6 Evaluate the integral. $\int_{-7}^{-4} \int_{1}^{2} 3x \,dy \,dx$ a. $\frac{27}{2}$ b. $-\frac{9}{2}$ c. $\frac{27}{2}$ d. $-\frac{99}{2}$

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3. Comprehensive Questions (total 40 points, each question 20 points) 1) A seismic instrument like the one shown in Figure 1 is to be used to measure a periodic vibration having an amplitude of 0.5 cm and a frequency of 628 rad/s. To do: (a) Specify an appropriate combination of natural frequency and damping ratio such that the dynamic error in the output is less than 5%. (b) Specify spring constant and damping coefficient that would yield these values of natural frequency and damping ratio? (c) Calculate the phase lag for the output signal. (d) if the input frequency were changed to natural frequency? calculate the phase lag.

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jake a.