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QUESTION 4 [14 Marks] Aronow and Kronzon (1991) identifies coronary factors among men and women in a long- term health care facility. Of the 215 subjects who were black, 58 had diabetes mellitus. Of the 1140 white subjects, 217 had diabetes mellitus. Construct a 90% confidence interval for the difference between the two populations.

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Find an equation of the plane. the plane through the point (7, -2, -6) and parallel to the plane z = 3x - 4y 3x + 4y - z = 35

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Problem 2. Using the following data, what is the total quantity of heat, in kJ, is required to convert 1.27 moles of compound X from -15.1 $^\circ$C to steam at 148.9 $^\circ$C? $T_{melting}$ = 3.7 $^\circ$C $T_{boiling}$ = 105.2 $^\circ$C molar mass = 32.042 $\frac{g}{mol}$ $\Delta H_{fus}$ = 321 $\frac{J}{g}$ $\Delta H_{vap}$ = 2105 $\frac{J}{g}$ $C_{solid}$ = 1.55 $\frac{J}{g\cdot ^\circ C}$ $C_{liquid}$ = 3.36 $\frac{J}{g\cdot ^\circ C}$ $C_{gas}$ = 1.25 $\frac{J}{g\cdot ^\circ C}$

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1. The genetic basis of all life is: RNA Protein DNA The cell Lipids

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The typical diameter of an alveolus is 0.3mm. The surface tension of water is about 70 dyne cm^(-1). The dyne is the unit of force in the cgs system: 1gcms^(-2). It is converted to N by multiplying by 10^(-3)kgg^(-1) imes 10^(-2)mcm^(-1)=10^(-5)kgg^(-1)mcm^(-1). a. What is the pressure within this alveolus assuming no surfactant at mechanical equilibrium? Give the answer in Pascals (Nm^(-2)) and in mmHg. b. Surfactant lowers the surface tension to about 28dynecm^(-1). What would the pressure be in an alveolus with a diameter of 0.3mm ? c. Expanding the lungs increases the size of the alveoli and increases the surface area. How much work is necessary to expand the alveoli in a normal tidal volume of 0.5L when the FRC (functional residual capacity) is 2.3L and assuming there is surfactant? (Hint: calculate work either as PdV or ydA; use the change in volume given to calculate dV or dA given that the rest diameter of alveoli is 0.3mm and that there are N of them.) d. During normal tidal breathing the airflow is about 0.5Ls^(-1) and the pressure driving airflow is about 1mmHg. Calculate the overall airway resistance. Now estimate the energy required to overcome this calculated airway resistance. 1. The typical diameter of an alveolus is 0.3 mm. The surface tension of water is about 70 dyne cm-1 The dyne is the unit of force in the cgs system: 1 g cm s-2. It is converted to N by multiplying by 10-3 kgg-1x 10-2m cm-1=10-5 kg g-1m cm-1. a. What is the pressure within this alveolus assuming no surfactant at mechanical equilibrium? Give the answer in Pascals(N m-2 and in mmHg. b. Surfactant lowers the surface tension to about 28 dyne cm-1.What would the pressure be in an alveolus with a diameter of 0.3 mm? c. Expanding the lungs increases the size of the alveoli and increases the surface area. How much work is necessary to expand the alveoli in a normal tidal volume of 0.5 L when the FRc (functional residual capacity) is 2.3 L and assuming there is surfactant?(Hint: calculate work either as PdV or ydA;use the change in volume given to calculate dV or dA given that the rest diameter of alveoli is 0.3 mm and that there are N of them.) d. During normal tidal breathing the airflow is about 0.5 L s-1 and the pressure driving airflow is about 1 mmHg. Calculate the overall airway resistance. Now estimate the energy required to overcome this calculated airway resistance

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If a toxin prevented sodium channels from opening, how would that affect the generation of a nerve impulse?

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Use the Alternating Series Test on the series.\\ $\sum_{n=1}^\infty (-1)^{n+1} (\frac{n}{10})^n$

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R$_1$ 100 k? R$_f$ 10 k? R$_2$ 50 k? V$_OUT$ R$_3$ 25 k? R$_4$ 12.5 k? Figure 3 Refer to Figure 3. Assume all inputs are +3.0 V. The output will be A. +1.5 V B. -1.5 V C. +4.5 V D. -4.5 V

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1. What is the main function of the large intestine? ? A. Absorption of water ? B. Digestion of fats and proteins ?? C. Absorption of nutrients ? D. Recycling of digestive enzymes ?

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EXAMPLE 3.6 Determine suitable shaft diameter if $S_y = 150$ MPa using the theories of von Misses. Take $FS = 2.$

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