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7. (15) A tank in an industrial chiller system has a diameter of 10 ft and contains an ethylene glycol (incompressible with S.G. = 0.823). The initial liquid level is 6 ft above the floor of the tank. Two pumps pull refrigerant from the tank for chillers in different areas of a plant. A Venturi flowmeter after one pump (line 2) indicates a volumetric flow rate of 1.4 $ft^3/s$. A mass flowmeter after the second pump (line 3) indicates a mass flow rate of 2.58 slugs/s. Through the industrial process, the two supply lines are combined and return to the tank through one return pipe. An ultrasonic flowmeter on the return (inlet) line to the tank indicates an average fluid velocity of 15.23 ft/s in a 6 in. diameter pipe. (Figure and part (c) on Page 2!) (a) What are the volumetric flowrates (in $ft^3/s$) at stations 1 and 3? (b) What is the instantaneous rate of change the level of ethylene glycol in inches/hr? (c) Is there a leak in one of the chillers, or is refrigerant being added in another part of the piping system? $v_1 = 15.23 ft/s$ $D_1 = 6 in.$ $v_2 = 1.4 ft^3/s$ $m_3 = 2.58 slugs/s$
You are given the sample mean and the population standard deviation. Use this information to construct the 90% and 95% confidence intervals for the population mean. Interpret the results and compare the widths of the confidence intervals. From a random sample of 33 business days, the mean closing price of a certain stock was $107.64. Assume the population standard deviation is $10.5%. The 90% confidence interval is ( (Round to two decimal places as needed.)
Draw the starting alkyl chloride that would produce this alkyne under these conditions. Drawing 1. $NaNH_2$, $\Delta$ 2. $H_3O^+$
Question 33 2 pts In the language of interdependence theory, uncommitted lovers probably have Low dependence and high satisfaction High dependence and low satisfaction Low dependence and low satisfaction High dependence and high satisfaction
Which statement below would cause an increase in labor supply? a) Wages for music producers are rising. b ) Music companies reduced their educational requirements for jobs in music which lead to a rise in job applications c ) State of New York discontinued a free degree program that provided students and opportunity to learn how to produce music The City of Arlington increased regulations making it harder for music promoters to hold concerts .
1,000,000 1,042,000 1,000,000 1,000,000
The matrix $A = \begin{pmatrix} 1 & 1 \ -2 & 4 \end{pmatrix}$ is diagonalizable with eigenvectors $\begin{pmatrix} 1 \ 1 \end{pmatrix}$ and $\begin{pmatrix} 1 \ 2 \end{pmatrix}$. Explain why A is diagonalizable, and find the diagonal matrix using the similarity transformation $C^{-1}AC = D$. What were the original eigenvalues?
Find the second-order partial derivatives of the function. Show that the mixed partial derivatives $f_{xy}$ and $f_{yx}$ are equal.\ $f(x, y) = \ln(3 + x^2y^2)$ $f_{xx} = $ $f_{yy} = $ $f_{xy} = $ $f_{yx} = $
2. The weights of turtles caught in two different lakes were measured to compare the effects of two lake environments on turtle growth. All the turtles were the same age and were tagged before being released into the lakes. The weights for $n_1 = 10$ tagged turtles caught in lake 1 and $n_2 = 8$ caught in lake 2 are listed here. Do the data provide sufficient evidence to indicate a difference in the distributions of weights for the tagged turtles exposed to the two lake environments? Use the Wilcoxon rank sum test with $\alpha = 0.05$. Lake Weight (grams) 1 422 453 417 434 439 414 419 479 383 456 2 368 391 422 408 374 360 377 416
Dusinesses JaiZZ TZ JZ Question 2 Not yet answered Marked out of 1.00 Flag question Time left 0:51:50 "Even today, if I tell my parents or their friends to buy through online marketplaces, they will not. Despite the fact that they see me shopping online. There is a trust deficit," Roshan says. An individual who comes up with an idea to take advantage of the above scenario would have generated a business idea from... A. a common need. B. an existing problem. C. everyday activities. D. the entrepreneur's skill, expertise, and aptitudes. +
