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8–52 Air enters a nozzle steadily at 200 kPa and 65°C with a velocity of 35 m/s and exits at 95 kPa and 240 m/s. The heat loss from the nozzle to the surrounding medium at 17°C is estimated to be 3 kJ/kg. Determine (a) the exit temperature and (b) the exergy destroyed during this process. Answer: (a) 34.0°C, (b) 36.9 kJ/kg

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What is title IX and how does it impact you as a student?

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The hypothetical city of Hurstville is trying to decide how many city beautification projects should be approved each year. These projects involve planting gardens, commissioning murals, and building fountains. The city has two types of citizens. Type B citizens appreciate beauty more than type A citizens. There is an equal number of each type of citizen. The accompanying schedule depicts each type of citizen's marginal benefit for city beautification projects. The average cost of each project is $400. Use the information in the schedule to answer the questions. Marginal Benefit Schedule Q MBA MBB 0 400 600 1 300 500 2 200 400 3 100 300 4 0 200 5 0 100 6 0 0 What is the optimal quantity of city beautification projects? 2 3 4 1 City beautification is a public good because: it is rival in consumption and nonexcludable. it is nonrival in consumption and nonexcludable. it is nonrival in consumption and excludable. it is rival in consumption and excludable.

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3) Sally Winston is contributing $3200 each year to a Roth IRA. The IRA earns 3.8% per year. How much will she have at the end of 25 years? (2 points)

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Non-Professional critics serve as teachers to those of us without substantial backgrounds in a particular art form. True False

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Let X and Y be jointly continuous random variables with joint PDF f(x,3) = (3x13 0 < x<1, 1 0.3)

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Solve the logarithmic equation.\\ $\log_5(y+5) = \log_5(y-4) + \log_54$

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Examples: Suppose that mu , the mean height of adult males, is unknown. A random sample of 36 men yields ar{x} =68.70^(''). a) Give a point estimate for the population mean. b) Suppose that somehow the population variance is known to be 6.25 . Use the above sample data to give a 95% margin of error and confidence interval for the unknown population mean. Suppose that the sample size is changed to 64 . What are the margin of error and interval? For n=36, change the confidence level to 90%. Suppose that we want a 95% confidence interval, and we insist on an estimation error of at most (1)/(2^('')). What is the minimum sample size that will ensure this? Examples: 1.Suppose that the mean height of adult males,is unknown.A random sample of 36 men yields X=68.70". a) Give a point estimate for the population mean. b)Suppose that somehow the population variance is known to be 6.25.Use the above sample data to give a 95% margin of error and confidence interval for the unknown population mean. 2. Suppose that the sample size is changed to 64. What are the margin of error and interval? 3.For n =36, change the confidence level to 90% 4.Suppose that we want a 95% confidence interval, and we insist on an estimation error of at most 1/2". What is the minimum sample size that will ensure this?

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The x-ray beam is described as being heterogeneous. This means that the photons making up the beam: a. all have the same energy level b. travel at different speeds c. all have the same frequency d. have different energy levels Question 2: Not yet answered What is the relationship between wavelength and frequency? a. no relationship at all b. directly proportional c. inversely proportional Question 3: Not yet answered In the electromagnetic spectrum, higher frequencies are associated with wavelengths and energies: a. shorter; higher b. shorter; lower c. longer; higher d. longer; lower

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2. [-/1 Points] DETAILS Use sigma notation to write the sum. $\left[\left(\frac{5}{n}\right)^3 - \frac{5}{n}\right] \left(\frac{5}{n}\right) + \dots + \left[\left(\frac{5n}{n}\right)^3 - \frac{5}{n}\right] \left(\frac{5}{n}\right)$ $\sum_{i=1}$

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richard h.