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michelle moya

michelle m.

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Find the exact value of the real number y if it exists. y = arctan 0 Select the correct choice and fill in any answer boxes A. y = arctan 0 = (Simplify your answer. Type an exact answer, u the expression.)

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What is the specific heat of lead if it takes 97.4 J to raise the temperature of a 75.4 g block by 10.5 ∘C ? Express your answer with the appropriate units.

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Which two ions have the same electron configuration in the ground state? Se$^{2+}$ & I$^-$ Fe$^{2+}$ & Fe$^{3+}$ Rb$^+$ & Cs$^+$ Ba$^{2+}$ & I$^-$ None of these

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21 Select all of the following antibodies found in the blood of a person with blood type O.

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If a, b, and c are real numbers, the distributive property states that a(b + c) =

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5. Use the Max/Min Inequality to approximate the value of $\int_{\frac{\pi}{4}}^{\frac{\pi}{3}} \tan x \, dx$ (4 Points)

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Question: For the BJT amplifier circuit given in Figure 1, it has $V_{EE} = V_{CC} = 15$ V, $R_1 = 550 \Omega$, $R_1 = R_2 = 200 \text{ k}\Omega$, $R_E = 100 \text{ k}\Omega$, $R_C = 10 \text{ k}\Omega$, $R_{E1} = 50 \text{ k}\Omega$ and $R_{E2} = 150 \text{ k}\Omega$. Assume the transistor is with $V_{BE} = 0.7$ V, $V_A = 60$V, and $\beta = 100$, and the capacitors have infinite value. In your answers to the following parts, please express all fractional voltage and current values in mV and mA respectively up to two decimal places in your calculation. (d) Calculate the DC power dissipation of each component of the circuit. (e) Verify if the total DC power dissipated by the circuit computed in (d) is equal to the total power delivered by -$V_{EE}$ and $V_{CC}$. (1) Without changing the transistor, suggest two effective ways to increase the voltage gain of this amplifier circuit. Please indicate the direction of change (increase or decrease) if your suggestions involve changes in component values.

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f. (2 points) Your boss wants to keep costs low, and it would cost $3.2 million to release a movie on an additional 200 screens. Assuming your estimates are trustworthy, should your boss spring for the extra screens? g. (2 points) The movie is scheduled for release in September, and it would cost $1 million to speed up production enough to allow a July release without hurting quality. Assuming your estimates are trustworthy, is it worth the rush?

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Question 5: Consider a solid in an environment where we can control its temperature $T$, the pressure $P$ and where we can impose an electric field $E$ across it. a) How many independent response functions can be defined for this system. Write down expressions for them (giving them different Greek letter names). Make sure that your definitions are independent of the size of the system. b) Assume that the solid at constant $T$ and $P$ and in a zero electric field is suddenly placed in an electric field having magnitude $E_1$. Derive an expression for the change in internal energy of the solid after it has reached a new equilibrium state at the same $T$ and $P$, but in an electric field of $E_1$. Write this expression in terms of measurable state variables and response functions.

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$h(t) = \int_{-\infty}^{\infty} k S^*(f) e^{-j2\pi fT} e^{j2\pi f t} df$ $= \int_{-\infty}^{\infty} k S(-f) e^{-j2\pi fT} e^{j2\pi f t} df$ why? $h(t) = \begin{cases} kS(T-t) & 0 \le t \le T \\ 0 & otherwise \end{cases}$

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