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Question 19 of 20: Select the best answer for the question. 19. Which of the following conductors can you install when using the pressure terminals on a receptacle? O A. No. 12 solid aluminum O B. No. 10 solid copper O C. No. 12 solid copper O D. No. 14 solid aluminum

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SUMMARY FOR. You learned to write simple if statements, if-else chains, and if-elif-else chains FOR PYHTON

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A 2D gels allow you to measure the amount of protein that is being expressed in a sample true or false

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2. (a) For a body moving in a straight line with constant acceleration $a$, initial displacement $s(0) = s_0$, and initial velocity $v(0) = v_0$, derive the following expressions for the dependency of the velocity and displacement with time $t$: (i) $v(t)$ (ii) $s(t)$ (iii) Sketch the graphs of the functions $v(t)$ and $s(t)$ for the case $s_0 > 0$, $v_0 > 0$, $a < 0$. (b) A car, moving with constant acceleration, passes successively two road segments, each 12m long. Find the acceleration of the car $a$ and the speed $v_0$ at the beginning of the first segment if the car passed the first road segment in time $t_1 = 1s$ and the second in $t_2 = 2s$. 3. (a) Derive an expression for the displacement vector $\mathbf{r}(t)$ of a projectile launched from the origin at an angle $\alpha$ to the horizontal with an initial speed $v_0$. Take the horizontal and vertical unit vectors to be $\mathbf{i}$ and $\mathbf{k}$ respectively. Derive expressions for the following: (i) Velocity vector $\mathbf{v}(t)$. (ii) Displacement vector $\mathbf{r}(t)$ of the projectile. (iii) The trajectory $z(x)$ of the projectile in terms of the horizontal ($x$) and vertical ($z$) components of the displacement. (iv) The maximal horizontal range $x_{max}$ of the trajectory before the projectile hits the ground ($z = 0$) again. (b) A signal flare is fired from a flare gun with initial speed $v_0$ at an angle of $45^\circ$ to the horizon. The flare starts to burn from the launch, burns for 5s and stops burning at the highest point of its trajectory. What is the value of the initial speed $v_0$? Ignore the air resistance to the flare's motion. 4. (a) Briefly explain the concept of the work in the context of mechanics. Give the expression for the work in the case of a constant force acting on a particle. What units are used to measure work? (b) The position $\mathbf{r}$ of a particle at time $t$ is given by the rule $\mathbf{r}(t) = 0.5\sin(2t)\mathbf{i} + 2\mathbf{j}$. Find the value of the velocity $\mathbf{v}$ at the initial time $t = 0$. (c) A homogeneous stick AB, the ends of which can slide without friction along the horizontal plane OA and the vertical wall OB, is held in equilibrium by the tension of the string OC (see figure). The stick is inclined to the horizontal plane at an angle $\alpha$ and the string at an angle $\beta$. (i) Find the tension of the string $T$ when the overall mass of the stick is $m$. Additional help: The length $l_1 = |BC|$ and $l_2 = |AC|$ can be expressed using the length of the string $l$, as follows $l_1 = l \frac{\cos\beta}{\cos\alpha}$, $l_2 = l \frac{\sin\beta}{\sin\alpha}$ (ii) For which relations between $\alpha$ and $\beta$ is $T > 0$?

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$300,000 Initial Investment, expected life = 8 yrs, salvage value = $20,000, revenues and expenses are given below: 1) Payback Period \textit{(remember to disclude non-cash depreciation expense)}?, is this within the required limit of 5 years? 2) Simple Rate of Return? is this within the required 12%? Given: Revenues Initial Investment: 300,000 $ 200,000 Less operating expenses: Commissions to amusement houses $ 100,000 Insurance 7,000 Depreciation 35,000 Maintenance 18,000 160,000 Net operating income $ 40,000 1) Payback Period: Acceptable? 2) Simple Rate of Return: Acceptable? On Own

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Find an antiderivative $F(x)$ with $F'(x) = 9x^4 + 18x + 3$ and \newline $F(0) = 5.$ \newline $F(x) = $

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Advertising expense $1,100 Commissions expense $3,000 Delivery expense $1,500 Insurance expense $1,000 Opening inventory $6,000 Purchases $37,000 Purchase returns and allowances $3,100 Rent expense $2,900 Salaries expense $4,000 Sales (gross) $79,000 Sales returns and allowances $1,000 Transportation-in $2,300 The merchandise inventory at June 30, 2019 amounted to $8,000. Required: 1. Prepare a classified income statement. Assume all expenses not related to cost of goods sold are selling expenses. 2. Compute gross profit percentage.

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Problem 2 (6 pts.) A phosphate buffer, made of $H_2PO_4$ and $HPO_4^{2-}$, operates in the internal fluids of all cells. Also, phosphate buffer is commonly used in soft drinks to help control the pH. What is the pH of a soft drink in which the major buffer ingredients are 5.5 g of $NaH_2PO_4$ and 7.0 g of $Na_2HPO_4$ per 275 mL of solution? (2 pts.) Write the equation for the reaction that occurs when a few drops of KOH are added to the buffer.

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F. The table below lists the passenger status of people sailing on maiden voyage of the RMS Titanic, and whether or not they survived. Survived Did Not Survive Total Passenger - 1st Class 202 122 324 Passenger - 298 695 993 2nd or 3rd Class Crew 212 679 891 Total 712 1496 2208 Let A be "was a first class passenger", B be "was a second or third class passenger", C be "was a crew member", and S be "survived the voyage". 19. Calculate each of the probabilities from #18. Express answers as either exact fractions or as decimals with at least four places. a. $P(S)$: 0.3225 b. $P(\overline{S})$: 0.6775 c. $P(A)$: 0.1467 d. $P(\overline{A})$: 0.8533 e. $P(B \text{ or } C)$: f. $P(B \text{ and } C)$: g. $P(A \text{ and } S)$: h. $P(A \text{ or } S)$: i. $P(S | A)$: j. $P(A | S)$: k. $P(S | \overline{A})$: l. $P(\overline{A} | S)$:

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Use the References to access important values if needed for this question. MnO$_2$ + Cr(OH)$_3$ + OH$^-$ $\rightarrow$ MnO$_4^-$ + Cr + 2H$_2$O In the above redox reaction, use oxidation numbers to identify the element oxidized, the element reduced, the oxidizing agent and the reducing agent. Name of the element oxidized: Name of the element reduced: Formula of the oxidizing agent: Formula of the reducing agent: Submit Answer Try Another Version 4 item attempts remaining

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