Numerade

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4. (15 points) The activity coefficient of Zn in Zn-Cd alloys at 450 °C is $\ln \gamma_{Zn} = 0.875X_{Cd}^2 - 0.30X_{Cd}^3$. (a) Please use G-D eqn to derive the corresponding $\ln \gamma_{Cd}$ in $X_{Zn}$. (5 points) (b) Use (a) and the regular solution model ($\alpha RT = \Omega$) to find the $\alpha$. Use the calculated $\alpha$ to tell 1. This is a positive or negative deviation alloy system. 2. Zn or Cd having a higher melting temperature. (5 points) (c) Use $\alpha_{Zn}$ and $\alpha_{Cd}$ in (b) as the (unitless) bond energies for pure Zn and Cd to find the bond energy of $\alpha_{Zn-Cd}$ at the condition of Zn:Cd=1:1 and the coordination z=2. (5 points)

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Calculate the change in entropy that occurs in the system when 1.05 mol of acetone (C3H6OC3H6O) condenses from a gas to a liquid at its normal boiling point (56.1 ∘C∘C). The heat of vaporization is 29.1 kJ/mol.

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3. At a certain point in space a particle of charge $+q$ experiences NO net force. Based on this we can DEFINITELY conclude that: The algebraic sum of other charges nearby must be zero. There cannot be any other charges near $+q$. If there are other charges near $+q$, they must have opposite sign to $+q$. None of these statements is definitely true.

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2.7 Look at the scenario below, where Alice sends an email to Bob. Alice's mail server Bob's mail server Alice's agent Bob's agent Key: Message queue User mailbox Figure 2.15 Alice sends a message to Bob For the questions below, assume both Bob's and Alice's user agents use the IMAP protocol. 1. At point 2 in the diagram, what protocol is being used? 2. At point 4 in the diagram, what protocol is being used? 3. At point 6 in the diagram, what protocol is being used? 4. Does SMTP use TCP or UDP? 5. Is SMTP a 'push' or 'pull' protocol? 6. Is IMAP a 'push' or 'pull' protocol? 7. What port does SMTP use? 8. What port does IMAP use?

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Using the definition of the derivative, find $f'(x)$. Then find $f'(1)$, $f'(2)$, and $f'(3)$ when the derivative exists.\ f(x) = -x^2 + 5x - 5\ f'(x)=\ (Type an expression using x as the variable.)

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2. A reciprocating single-acting pump has a cylinder of 125mm bore and 300mm stroke and draws water from a sum whose water level is 1m below the axis of the pump. The suction pipe is 2m long and has a diameter of 50mm. Calculate the speed in R.P.M at which separation occurs if this takes place when the absolute pressure in the cylinder falls to 2.4m of water. Atmospheric pressure is equivalent to 10.3m of water. Assume simple harmonic motion of the piston. What is the maximum theoretical discharge in liters/min of this pump?

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Hw02-1.5-Limits: Problem 5 Problem Value: 1 point(s). Problem Score: 0%. Attempts Remaining: Help Entering Answers | Similar Example Video (1 point) Let $f(x) = \begin{cases} 20 & \text{if } x < -10 \\ -x + 10 & \text{if } -10 \le x < 6 \\ 0 & \text{if } x = 6 \\ 10 & \text{if } x > 6 \end{cases}$ Sketch the graph of this function and find following limits if they exist. $\lim_{x \to -10^-} f(x) =$ $\lim_{x \to -10^+} f(x) =$ $\lim_{x \to -10} f(x) =$ $\lim_{x \to 6^-} f(x) =$ $\lim_{x \to 6^+} f(x) =$ $\lim_{x \to 6} f(x) =$ Help Entering Answers Preview My Answers Submit Answers Show me another

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Define the Diplopia and describe its manifestation by the patient. What is observed by the physician?

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Given sinA=(3)/(sqrt(58)) and that angle A is in Quadrant I, find the exact value of secA in simplest radical form using a rational denominator.

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Ammeter Voltmeter 4 ? 12 V 2 A i v

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