Numerade

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QUESTION 6 A second-hand belt drive is to be used to drive a pump and consists of four V-belts in parallel on identical 300 mm diameter grooved pulleys. The angle of the groove is 30°. The cross-sectional area of each belt is 300 mm², the coefficient of friction is 0,12 and the maximum allowable safe stress in the material is 7,2 MPa. Ignore the reduction in belt tension due to centrifugal force and assume an appropriate efficiency for the pump. 6.1 Verify that the belts are suitable to drive a slurry pump running at 960 r/min and elevating 260 t/h of solids, in the form of a pulp, to a total head of 15 m. The relative density of the solids is 2,7 and for the pulp is 1,2. 6.2 Name and explain FIVE causes of premature V-belt failure. (15) (5) [20]

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A company reports assets of $246,000; liabilities of $119,500; revenues of $27,300; and expenses of $23,800. Which of the following will be reported on the income statement? Total stockholders' equity of $3,500 Total stockholders' equity of $126,500 Net income of $126,500 Net income of $3,500

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A simple strategy to avoid potential pitfalls of off-target effects of RNAi is to require the same inactivation phenotype with two or more different RNA molecules against the target gene. Choose one: O A. True O B. False

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Question 7 (3 points) Construct an X-Bar chart. \begin{tabular}{|c|c|c|c|c|c|} \hline Day & \begin{tabular}{c} Device \\ 1 \end{tabular} & Device & Device & Device & Device \\ 2 & 1 & 3 & 4 & 5 \\ \hline 1 & 30 & 38 & 33 & 28 & 35 \\ \hline 2 & 44 & 40 & 42 & 43 & 36 \\ \hline 3 & 28 & 35 & 28 & 30 & 31 \\ \hline 4 & 48 & 42 & 41 & 39 & 33 \\ \hline 5 & 42 & 43 & 54 & 47 & 48 \\ \hline \end{tabular} the standard deviation $ \sigma $ is $ \qquad $ (Only rounding the final answer to 4 decimal places, in the format of $ x, x \times x(x) $

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In humans, the striking similarities between homologous chromosomes do not apply to the Blank______. Multiple choice question. sex chromosomes Z and W autosomes smallest chromosomes largest chromosomes sex chromosomes X and Y

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Find an and a6 for the following arithmetic sequence. 1,4,7,10,13, ..

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Fungal phyla characteristics Complete the following chart to describe the characteristics of the phyla within the kingdom fungi. Club fungi Microsporidia Form symbioses with plants Phylum Sac fungi Form symbioses with plants Microsporidia Club fungi AM fungi Chytrid fungi Encephalitozoon cuniculi Chytrid fungi Zygospore fungi Ergot and yeast Single-celled, aquatic, flagellated AM fungi Giant puffball Sac fungi Sporangia and gametangia Characteristics Examples Ergot and yeast Giomerales Parasites of animals, often insects Zygospore fungi Form basdiocarp fruiting bodies Giant puffball Single-celled, aquatic, flagellated Reproduce by producing chains of asexual spores Sporangia and gametangia Black bread mold Chytriomyces hyalinus Encephalitozoon cuniculi

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Find the missing fractions in the following Magic Fraction Squares so that the entries in every row, column, and diagonal add to 1. 9 boxes 1/6 5/8. blank 3/8. blank. blank blank. blank. blank

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3. In a laboratory heat transfer experiment, heat flows through an annulus pipe with inside and outside radii of $R_i$ and $R_o$ respectively as depicted in FIGURE Q3. Compute the heat loss through the wall if thermal conductivity, k is function of temperature as given as below; $k = k_o(1 + 2T)$ L $R_o$ $R_i$ FIGURE Q3 [20 marks]

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matthew h.