Numerade

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Jonas is a graduate student who has been having a lot of trouble sleeping. According to the "Who's in the Expert's Chair?" segment of the "Sleep, Dreams, and Consciousness" lecture, which of the following is MOST LIKELY the cause of this? Jonas is an athlete and has to wake up at 5am every day to train. Jonas usually has his phone on "night shift" mode and he sees orangey light all day. Jonas usually drinks a whole cup of coffee and then takes a nap. Jonas usually works on his computer and sees a lot of white light before he goes to bed. Jonas usually takes naps for about 10 - 15 minutes a day.

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Provide the proper IUPAC name for the alkene.

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For the vectors u = (-1,2) and v = (-5,1), calculate proj$_v$u and scal$_v$u. proj$_v$u = scal$_v$u = (Type an exact answer, using radicals as needed.)

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Which of the following was a result of the Boston Massacre? It increased resentment among colonists toward the British and contributed to the repeal of the Townshend Acts. The colonists violently protested when the nine British troops who fired were returned to England for their trial and were acquitted. Americans thereafter quietly paid their taxes to avoid violence, until the British antagonized the militia at Lexington in 1775. The day after the massacre, the Revolutionary War officially began in response.

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QUESTION 66 A man is brought to the hospital suffering from nausea, vomiting, and severe stomach cramps. He had recently returned from a hiking trip in northern Minnesota. A sample taken from the man shows a single-celled flagellate organism that lacks mitochondria but has two nuclei. This organism is a(n): a. excavate. b. diatom. c. apicomplexan. d. euglenozoan.

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Under what condition did Einstein say the mass of an object would increase?

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3. Find the derivative of the function. Simplify where possible. \begin{align*} (a) \ y &= \frac{e^x}{x^2} \\ (b) \ y &= \cos^{-1}(e^{2x}) \\ (c) \ f(x) &= \tan^{-1}(\ln x) \\ (d) \ y &= 3^{x \ln x} \\ (e) \ y &= \cot^{-1}t + \cot^{-1}\frac{1}{t} \\ (f) \ f(x) &= \sqrt{1-x^2} \arccos x \end{align*}

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In the figure, two projectiles launched with the same initial speed but at different launch angles (30° and 60°) land at the same spot. Ignore air resistance. Which has a longer range?

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Problem #1 [40 Points] External Forced Convection-Turbulent Flow Consider a refrigeration truck traveling at ~55 mph at a location where the air temperature is 80Â°F. The refrigerated compartment of the truck can be considered to be a 9-ft-wide, 8-ft-high, and 20-ft-long rectangular box. The refrigeration system of the truck can provide 3 tons of refrigeration (i.e., it can remove heat at a rate of 600 Btu/min). The outer surface of the truck is coated with a low-emissive material, and thus radiation heat transfer is very small. Determine the average temperature of the outer surface of the refrigeration compartment of the truck if the refrigeration system is observed to be operating at half capacity. Assume the air flow over the entire outer surface to be turbulent and the heat transfer coefficient at the front and rear surfaces to be equal to that on the side surfaces. Given: k = 0.0148 Btu/hrftÂ°F v = 0.1697x10^3 ft/s Pr = Assume: Steady operating conditions Neglect radiation Air is an ideal gas Constant properties Air flow turbulent over entire surface Nu = hL/k = 0.037 Re Pr^(1/3) R = VL/v Sketch: Air 80Â°F Y = 55 mph

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For the following circuit, determine RIN(BASE) and R(OUT) under AC conditions. Assume r' = 25mV/IE Assume $\beta_{AC} = 160.$ RIN(BASE) = R(OUT) = Vin +12V 1K 22K Vout Cin Cout NPN 6.8K CE 560

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xavier a.