Numerade

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1. Draw a schematic diagram of a parallel circuit connected to a 12 V battery with 3 resistors (20, 30, and 6.5Ω). Fill in the chart below. Draw the electron flow. Show work. (3 points) R₁ Voltage Current Resistance R₂ R₃ R₄

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In a Litmus milk tube, what does an alkaline reaction reveal about fermentation and proteolysis? What does an acid reaction reveal about fermentation and proteolysis?

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9 1 point Benzodiazepines impact the functioning of the brain's neurotransmitter system by inhibiting the reuptake of GABA. stimulating the binding sites on the NMDA receptor complex. stimulating the binding sites on the GABA-A receptor complex. stimulating GABA synthesis in the presynaptic corpuscles. Next

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Why would the size of a bacterium be more accurate in a negative stain than in a direct stain?

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There is a chemically synthesized DNA oligonucleotide, 5'ATCG3'. Please draw the all-atom structure of this DNA strand, including that of the phosphate group, the pentose (ribose), and the bases. The structure should be illustrated in the 5' to 3' direction. Please note that, according to the DNA synthesis pathway (see slides), both 5' and 3' ends are terminated with a hydroxyl group (OH), but not a phosphate group. This is different from the endonuclease-cleaved DNA, which has a 5' phosphate group and a 3' -OH group.

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2. Prove whether the following two systems are analogous or not:

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Calculate the pH at 25 $^\circ$C of a 0.75M solution of trimethylammonium chloride ((CH$_3$)$_3$NHCl). Note that trimethylamine ((CH$_3$)$_3$N) is a weak base with a $pK_b$ of 4.19. Round your answer to 1 decimal place. pH =

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EXERCISES 1. Show how the following key equation was derived in the Model: Î”G = Î”H - TÎ”S EXERCISES 1. Show how the following key equation was derived in the Model: G = H - TS Surroundings System Î”S > 0 System -q = Î”H < 0 S = entropy G = Gibbs free energy = difference or change in H = enthalpy T = temperature in K Universe (u) The entropy change of the universe is the total entropy change of the system and its surroundings (1) Î”S = Î”Ss. Heat flowing into the surroundings increases the entropy of the surroundings. Since Î”H is positive, corresponding to an increase, 2Î”S - Î”H/T. Substituting equation 2 into equation 1 and multiplying through by -T gives equation 3 (3 - TÎ”S = Î”H - TÎ”S). The quantity on the right side, which depends only on the system, is defined as the free energy (4). Î”G = Î”H - TÎ”S The free energy is also related to the entropy change of the universe by equation 5: Î”G = -TÎ”S. The free energy accounts for the entropy of the universe in terms of the enthalpy and entropy of the system. These quantities (G, H, S) all refer to the system, so the subscript "sys" is not necessary and will no longer be used.

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2) In a Buck-Boost converter operating at 20khz, L=0.05mH. The output capacitor C is sufficiently large and Vdc=15v. The output is to be regulated at 10v and the converter is supplying a load of 10 w. Find the duty ratio D of the converter. (20 points)

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6. A double dwell cam moves a follower linearly from 0 to 1.5 inches in 45°, dwells for 150°, falls linearly 1.5 inches in 90°, and dwells for the remainder. The total cycle takes 6 seconds. a) Determine the required angular velocity of the cam. b) Sketch the SVAJ (displacent-velocity-acceleration-jerk) diagrams for the follower.

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