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Stolb23 [73]
3 years ago
5

Suppose we would like to predict the duration of an eruption of the Old Faithful geyser in Yellowstone National Park based on th

e waiting time before an eruption. Fit a simple linear model in R that accomplishes this task. Store the results in a variable called faithful_model. Output the result of calling summary() on faithful_model.
Engineering
1 answer:
liq [111]3 years ago
6 0

Answer:

head(faithful)

faithful_model<-lm(eruptions~waiting,data=faithful)

summary(faithful_model)

Explanation:

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a. Determine R for a series RC high-pass filter with a cutoff frequency (fc) of 8 kHz. Use a 100 nF capacitor. b. Draw the schem
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Answer:

a) 199.04 ohms

b) attached in image

c) -0.696dB

Explanation:

We are given:

Fc = 8Khz = 8000hz

C = 100nF = 100*10^-^9F

a)Using the formula:

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b) diagram is attached

c) H(w) = \frac{V_out(w)}{Vin(w)} = \frac{1}{1-j\frac{wc}{w}}

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At F = 20KHz and Fc= 8KHz we have:

H(F)= \frac{1}{1-j\frac{8}{20}} = \frac{1}{1-j(0.4)}

|H(F)|= \frac{1}{\sqrt{1^2+(0.4)^2}}

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5 0
3 years ago
Water flows at a rate of 10 gallons per minute in a new horizontal 0.75?in. diameter galvanized iron pipe. Determine the pressur
ruslelena [56]

Answer:

\frac{\delta p }{l} = 30.4 lb/ft^3

Explanation:

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flow rate = 10 gallon per  minute = 0.0223 ft^3/sec

diameter = 0.75 inch

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Q =  VA

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V = \frac{0.223}{\frac{\pi}{4} \frac{0.75}{12}}

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from moody diagram f value corresonding to Re and \frac{\epsilon }{D}is 0.037

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\delta p = \frac{f l \rho v^2}{2D}

\frac{\delta p }{l} = \frac{1 \times 0.037 \times 1.94 \times 7.27}{\frac{0.75}{12}}

where 1.94 slug/ft^3is density of  water

\frac{\delta p }{l} = 30.4 lb/ft^3

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