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In experiment I you noted that: (i) Chlorine is a gas, bromine is a liquid and iodine is a solid at 300K (ii) Sodium chloride ionizes in water but bromine and iodine do not (iii) Sugar dissolves in water (iv) Iodine is soluble in hexane but sodium chloride is not (v) Bonding is essentially ionic if $\Delta x$ is greater than 2.0 If you compare the properties of $M_2(s)$ (where M is a non metal element) and the properties of NaCl (s), which of the following statements is not true? The Na-Cl bond and the Na-M bond are ionic The M-M bond is covalent The melting point of $M_2$ should be higher than that of ICl The ionization potential of Na should be lower than that of M Na in compounds is less electronegative than M

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Bacteria can enter and colonise the host by which of the following mechanisms. Pick one answer. Question 24Select one: a. All of these mechanism can be used by pathogenic bacteria to enter and colonise the host b. Hijacking a dendritic cell at the mucosal epithelial cell surface to enter the submucosa c. Entering the host via a vector d. Actively invading a host cell

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G H 1 J K L M N dom listing price square feet 17979 mean $385,198 2,490 r 0.891904 4895 meadium $342,200 1,984 r squared 0.709509 55228 std dev 173779 1357 slope 114.23 10642 intercept -100741 90788 25879 8147 54836 $4018 1,200,000 $7096 1,000,000 Scatterplot listing prices vs. square feet y = 114.23x + 100741 R2=0.7955 16198 51933 2439 32661 listing price 800,000 600,000 400,000 9159 200,000 38819 1,000 2,000 3,000 4,000 5,000 6,000 7,000 12186 3305 square feet 37173 91728 Scatterplot listing prices vs. square feet 55667 Linear (Scatterplot listing prices vs. square feet) 70°F Mostly cloudy

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Name:Score: /20Math 244 Written Homework 5Two Average AnalysisInstructions: In this homework, you will get the chance to see Statistics in action. We will create and examine a real life data set. When writing up this homework, keep in mind that I want both calculated values and the explanations for how you got them. Being able to communicate your logic is a crucial part of problem solving. You may find it useful to work with others on this assignment. Thats okay and encouraged. Got questions? Feel free to post on the Course Discussion Board.Important: Please complete the assignment in the space provided. This can be down by printing it out and writing in the space or using technology to write in the space. Once you are done, please upload a single PDF of your work.Data Collection (Cost of College):Overview: In this activity, we will compare the difference in in-state and out ofstate tuition.What you need: A computer with internet access.Setup: Be prepared to visit college websites to determine the cost.Directions:1. Pick ten undergraduate universities of your choice. Feel free to pick more if you would like.2. Determine the average cost per credit for in-state and out of state tuition for each of your ten selected universities.Data: Place your data here:1. Determine if this is matched-pair or two-independent means. Then, calculate all relevant averages, standard deviations, and sample sizes.2. We wish to test if out of state college is more expensive on average. State the corre- sponding null and alternative hypotheses.3. Check the assumptions needed to perform the above hypothesis test. We will proceed regardless, but its important to understand when we should and shouldnt stop.4. What model, including the values for the center, degree of freedom, and standard devi- ation, should we use for analyzing the data?5. Based off your data from the Data Collection stage, calculate the p-value associated to the test and state the conclusion.6. Create a 95% confidence interval for the average difference in cost for in-state and out of state tuition per credit.7. This activity should have used the matched-pair model. What would need to change in the setup if this was two-independent averages instead?

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A high budget deficit tends to place ______ pressure on interest rates; the Fed's tightening of the money supply tends to place ______ pressure on interest rates. a. downward; downward b. upward; downward c. upward; upward d. downward; upward

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Genetic variation _______________. ? must be present in a population before natural selection can act upon the population. ? arises in response to changes in the environment. ? tends to be reduced when diploid organisms reproduce via sexual reproduction. ? is created by the direct action of natural selection.

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5. Michigan is considering raising the speed limit on I-94 to 75 mph. Assume that his change will lead to the loss of an additional three lives per year. Also assume that the average person lost was 30 years old and had 36 years of work left working at $70,000 per year; that would be this year and the next 35 years. (For convenience we will assume that these earnings are constant in real terms over the years.) Using the discounted future earnings approach determine the cost of lives lost per year if we should raise this speed limit. Assume the discount rate equals 3%.

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(b) Answer the questions that follow based on the information below. 1 k$\Omega$ V? 10 k$\Omega$ 5 k$\Omega$ +15 V Table 1: Op-amp specifications V? 10 k$\Omega$ + Input offset voltage ($V_{OS}$) = 6 mV (max) Input bias current ($I_B$) = 0.5 µA (max) Input offset current ($I_{OS}$) = 0.2 µA (max) -15 V Figure 6 (i) Identify the amplifier circuit in Figure 6. Assuming the op-amp is ideal determine an expression for the output voltage $V_o$ in terms of the input voltages $V_1$ & $V_2$. You do not need to use first principles. [4] (ii) If a real op-amp with the specifications given in Table 1 is used in this circuit, determine the maximum output error voltage. [4]

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PSEUDO CODE X BYTE Y BYTE Z BYTE X:= 205$_{10}$ 205 Y:= 225$_{10}$ 205 225 Z:= X + Y 205 225 174 I 7. Fill in all cells that have numbers.. + PSEUDO CODE X DWORD Y DWORD Z DWORD X:= 05FFAD10$_{16}$ 05FFAD10 Y:= 7FFEDE89$_{16}$ 05FFAD10 7FFEDE89 Z:= X - Y 05FFAD10 7FFEDE89 79FF3155 8. Fill in all cells that have numbers,

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3. Two identical blocks (Block 1 and Block 2) have a mass of 30 kg each and have been manufactured with a top surface slope of 25°. By flipping Block 1 upside-down the two blocks can sit one-on-top- of-the-other as shown below. This problem has 2 scenarios: (a) For Scenario A, draw the complete free body diagram of Block 2 and establish the smallest value of $\mu_{12}$, the coefficient of friction for the surface between Block 1 and Block 2, so that Block 1 does not slide on Block 2. (b) For Scenario B, assume that $\mu_{12} = 0.5$ and that that coefficient of friction between Block 2 and the ground, $\mu_{2G} = 0.4$. Determine the smallest value of T to make Block 2 slide. Scenario A Scenario B Block 1 Block 1 25° Block 2 T Block 2

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