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- 58. A retired partner from a large brokerage firm hasone million dollars available to invest in particularstocks or bonds. Each investment’s annual rate ofreturn depends on the state of the economy in thecoming year. The file P09_58.xlsx contains thedistribution of returns for these stocks and bonds asa function of the economy’s state in the coming year.As this file indicates, the returns from stocks andbonds in a fair economy are listed as X and Y. Thisinvestor wants to allocate her one million dollars tomaximize her expected value of the portfolio oneyear from now.a. If X 5 Y 5 15%, find the optimal investment strategy for this investor. (Hint: You could try a decisiontree approach, but it would involve a massive tree.It is much easier to find an algebraic expression forthe expected final value of the investment whena percentage p is put in stocks and the remainingpercentage is put in bonds.)b. For which values of X (where 10% , X , 20%)and Y (where 12.5% , Y , 17.5%), if any,…10:55 > t.myexams.unisa.ac.za MENU E Frag question A. 5.0 x 108 ft³ B. 6.0 x 108 ft³ C. 8.6 x 108 ft³ D. 2.1 x 108 ft³ E. 4.8 x 108 ft³ ||| Vol) 4G LTE2 T The largest building in the world by volume is the Boeing 747 plant in Everett, Washington. It measures approximately 650 m long, 710 yards wide, and 110 ft high. What is its volume in cubic feet? O 47 71% < myExamsWhat is the average kinetic energy of a proton in the center of the sun, where the temperature is 2.0 x 107 K? Express your answer with the appropriate units. Eavg Submit Part B μА Value Request Answer [www] Units ? What is the rms speed of a proton in the center of the sun, where the temperature is 2.0 x 107 K? answer with the appropriate units.
- Q) PLEASE ANSWER THIS QUESTION IN DETAILED, CONVINCING MANNER: Suggest one possible source of error that would cause the experimental values for the specific heat to be less than the actual values.The heat engine shown in the figure uses 2.0 mol of a monatomic gas as the working substance. (Figure 1) Figure p (kPa) 600 400 200 0 0 0.025 0.050 V (m³) 1 of 1 Part A Determine T₁, T2, and T3. Enter your answers numerically separated by commas. Express your answer using two significant figures. T₁, T2, T3 = 600,1800,1200 K Submit Previous Answers Correct Part BTwo rooms, each a cube 4 m per side, share a 12-cm thick brick wall. Because of a number of 100-W lightbulbs in one room, the air is at 30 deg C, while in the other room it is at 10 deg C. How many of the 100-W bulbs are needed to maintain the temperature difference across the wall? kbrick = 0.84 W/m.K Round your answer to 2 decimal places.
- A triple-point cell such as the one shown in Figure 19.20 (page 571) is constructed and calibrated at sea level. It is then shipped to Denver, which is 1 mi above sea level. Can the researchers in the Denver lab use the triple-point cell just as in a laboratory at sea level, or will special adjustments be needed? Explain.a) Estimate the average spacing between the molecules of 1 mol of an ideal gas at a pressure of 1atm and a temperature of 300 K. b) 1 mol of liquid water occupies a volume of 18 cm. Estimate the spacing between molecules. c) Use your result from part (a) to estimate the diameter of a water molecule. d) Estimate the factor by which water expands when it boilsWater vapor at a pressure 0f 2X10 N/m2 0nd a dempirature of as0°c is 0.32 x106 N/m2.following expanded to a yoessune of ec.For the low P.V1.25 this expanston determine: a. Pinal vapor condnion b. Syecipie haat transpan c. Changis in tntroyy SIDU
- Presents the diagram of the problem, necessary formulas, clearance and numerical solution: A poorly designed electronic device has two screws attached to different parts of the device that almost touch each other inside. steel bolts and brass are at different electrical potentials and if they touch, a short circuit will develop will damage the device. The initial separation between the ends of the screws is 5 μm to 27 ◦C. At what temperature will the screws touch? Assume that the distance between the walls of the device is not affected by temperature change and the coefficient coefficients of linear expansion αlaton = 19x10−6 ◦C −1 and αsteel = 11x10−6 ◦C −1Iculate the coefficient of linear thermal expansion. Locate a table of linear thermal expansion ficients online or in your textbook and compare your experimental results to the accepted value using percent error. CALCULATIONS: 1. Calculate Δ-Thot-Trm Record the result in the Table 1. Use the Conversion Table at the end of this manual, or the one on the top of the expansion base, to convert your thermistor resistance measurements, Ryn and Rnot,into temperature measurements, Trm and Thot Record your results in the table. sing the equation AL = α 2, T, calculate α for copper, steel, and aluminum mrnfid=74 Τα(Experimental)x1051 Table 1 MaterialL R TR(m) LT R(hot) . T(Room)TT(hot)! ΔΤ (m) Ohm(2) (m)Ohm(2) c 15 666 112 8 3 15 3.1 53 10. Rod #1 2.76 x (o Rod #2 Rod #3 |.n5 | 66. I 18.3 | 8.29 | 35 | 88 Coefficient of Linear Expansion of: 3. 216x10' Rod #1 Rod #2 Rod #3- Table 2 Material | Composition | α(Theoretical)x105 | α(Experim Rod #1 | tin Rod #2 Rod #3 ental)x105 | Percent Difference %…A copper-constantan thermocouple generates a voltage of 4.75 x 10-3 volts when the temperature of the hot junction is 110 °C and the reference junction is kept at 0 °C. If the voltage is proportional to the difference in temperature between the junctions, what is the temperature in degrees Celsius of the hot junction when the voltage is 2.45 x 10-³ volts? Number i eTextbook and Media GO Tutorial Units ✪
