| Select the best answer for the question. |
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1. Which of the following statements about engine configurations is true? |
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In: Mechanical Engineering
Which of the following(s) affects the composition of the optimal risky portfolio?
I. Expected returns of assets
II. Standard deviations of assets
III. Risk-aversion
IV. Correlation among assets
V. Risk-free rate
| A. |
I, II, III, and IV |
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| B. |
I, II, and III |
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| C. |
I, II, IV, and V |
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| D. |
I, IV, and V |
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| E. |
I, II, and IV |
In: Finance
In: Accounting
A voltaic cell is constructed that uses the following reaction and operates at 298 K. Zn(s) + Ni2+(aq) Zn2+(aq) + Ni(s) (a)
What is the emf of this cell under standard conditions?______ V
(b) What is the emf of this cell when [Ni2+] = 2.24 M and [Zn2+] = 0.112 M?_____ V
(c) What is the emf of the cell when [Ni2+] = 0.298 M and [Zn2+] = 0.925 M?____ V
In: Chemistry
A concentration cell based on the following half reaction at 312 k ag+ + e- --------> ag srp = 0.80 v has initial concentrations of 1.25 m ag+, 0.221 m ag+, and a potential of 0.04865 v at these conditions. after 8.3 hours, the new potential of the cell is found to be 0.01323 v. what is the concentration of ag+ at the cathode at this new potential? Please explain all the steps used to find the answer.
In: Chemistry
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Solution |
Voltage |
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Tin sulfate |
-0.010 |
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Aluminum sulfate |
-0.20 |
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Ferrous Sulfate |
-0.60 |
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Zinc sulfate |
-1.01 |
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Cell Type |
Experimental Potential, V |
Theoretical Potential, V |
Percent Error |
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Copper-Tin |
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Copper Aluminum |
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Copper-Iron |
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Copper-Zinc |
Standard copper potential = 0.339 V
% Error = [100 – (Theoretical/Experimental)] x 100
Please help me complete the table above.
In: Chemistry
Suppose that a parallel-plate capacitor has circular plates with
radius R = 28 mm and a plate separation of 5.5 mm. Suppose
also that a sinusoidal potential difference with a maximum value of
140 V and a frequency of 77 Hz is applied across the plates; that
is,
V = (140 V) sin[2π(77 Hz)t].
Find Bmax(R), the maximum value of the
induced magnetic field that occurs at r = R.
In: Physics
Many different ways have been proposed to make batteries. One cell is set up with copper and lead electrodes in contact with CuSO4(aq) and Pb(NO3)2 (aq), respectively. If the Pb2+ and Cu2+ concentrations are each 1.0 M, what is the overall cell potential?
Pb2+ + 2e- ---> Pb E = -0.22 V
Cu2+ + 2e- ----> Cu E = +0.34 V
answer: 0.56 V. how?
In: Chemistry
Some enzymes are inhibited by high concentratins of their own substrates. (a) show that when substrate inhibition is important the reaction rate v is given by
v= Vmax/ ( 1+km/[S}o + [S]o/K1
Where Ka is the equilibrium constant for dissociation of the inhibited enzyme substrate complex. (b) What effect does the substrate inhibition have on a plot of 1/v against 1/[S]o?
In: Chemistry
A room with 2.7-m-high ceilings has a metal plate on the floor with V = 0V and a separate metal plate on the ceiling. A 1.5 g glass ball charged to 5.0 nC is shot straight up at 4.7 m/s .
How high does the ball go if the ceiling voltage is 2.9×106 V ?
How high does the ball go if the ceiling voltage is −2.9×106 V ?
In: Physics