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rocio diaz

rocio d.

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1. Based on common bonding patterns, identify the expected charges on the circled atoms in the structures below (nonbonding electrons are not shown) 2. Which of the following molecules are constitutional isomers? Circle all that apply

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A jet airliner flies at 300 mph for the first half hour and last half hour of a flight. The rest of the time it flies at 600 mph. How long does it take fly a distance of 2700 miles? time of flight = hours

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The purpose of trade or professional journals is to inform practitioners in a specific field detailed information about research studies and theoretical issues related to their work. True or false? Pick the correct answer O True O False

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Negative values of the price elasticity of demand of a good can be attributed to:

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2. Maxwell's equations for electromagnetism in free space can be written as follows: (i) ? · B = 0 (ii) ? · E = 0 (iii) ? × E + ?B/?t = 0 (iv) ? × B - (1/c²) ?E/?t = 0 (a) The vector potential A is defined by B = ? × A and the scalar field ? by E = -?? - ?A/?t. Show that these relations are consistent with Maxwell's equations (i.e., that they satisfy Eqs. (i) and (iii)). (b) By choosing the Lorentz gauge (v) ? · A + (1/c²) ??/?t = 0, show that ? satisfies the wave equation (vi) ?²? - (1/c²) ?²?/?t² = 0 Hint: Substitute for E into (ii) and differentiate (v) with respect to time to eliminate A. (c) Show that the vector potential A also satisfies the wave equation. Hint: Substitute A and ? into the expressions for B and E in (iv). Then use the gradient of (v) to simplify the resulting expression.

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Water at 15°C ($\rho$ = 999.1 kg/m³ and $\mu$ = 1.138 × 10?³ kg/m-s) is flowing steadily in a 33-m-long and 6-cm-diameter horizontal pipe made of stainless steel at a rate of 10 L/s. Determine the pressure drop, the head loss, and the pumping power requirement to overcome this pressure drop. The roughness of stainless steel is 0.002 mm. 10 L/s 6 cm L The pressure drop is kPa. The head loss is 24.2 m. The pumping power requirement is 1.912 kW.

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Find $v_1$ and $v_2$? $\begin{bmatrix} \frac{3}{2} & \frac{1}{4} \\ \frac{3}{2} & \frac{3}{4} \end{bmatrix} \begin{bmatrix} v_1 \\ v_2 \end{bmatrix} = \begin{bmatrix} -29 \\ -27 \end{bmatrix}$

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For an ideal gas with constant specific heats, use Gibbs' equation to show that: Consider air in state 1 with static pressure and temperature of 2000 kPa and 2500 K, respectively, moving with a velocity Vi = 100 m/s. The air expands in a nozzle (no shaft power) adiabatically but irreversibly to state 2 with a pressure p2 = 50 kPa in a process that corresponds to an isentropic expansion. In your calculations, choose Tref = 300 K, Pref = 100 kPa, and sre(Tref, Pref) = 0 for air (y = 1.40, R = 287 J/kg-K). Calculate Mi and the stagnation properties pol, To1. (a) (b) Calculate T2, V2, M2, s2 - s1, and p2. (c) Use a plotting program to plot a T-s diagram showing the constant pressure lines P1, P2. Mark states 01, 1, 02, 2 on your plot. Use the irreversible process description to derive a relation between T and s for the expansion and plot the process 1 -> 2 on your T-s diagram. (d)

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Create a vector that holds integers. Write a loop that takes in integers from the user and inputs them into the vector. This loop will continue until the user enters 0 or a negative number. This feature demonstrates how vectors have unlimited size. Inside the loop, print out the return value of the size function to display how the vector is increasing in size. After terminating your loop, your vector is now populated. Write a second loop to print out the values of your vector. Part 2 Alter your code from part 1 and declare a vector of integers of size 5. Add more elements to the end of the vector. Write a second loop to print out your vector. (Use the range-based for loop)

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A company has an EBIT of $4,750 in perpetuity. The un levered cost of capital is 16.46%, and there are 27,230 common shares outstanding. The company is considering issuing $10,410 in new bonds at par to add financial leverage. The proceeds of the debt issue will be used to repurchase equity. The YTM of the new debt is 11.52% and the tax rate is 35%. What is the weighted average cost of capital after the restructuring? a) 13.44 b) 13.78 c) 14.13 d) 14.47 e)14.82

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