College

A model of a helicopter rotor has four blades, each 3.40 m long from the central shaft to the blade tip. The model is rotated in a wind tunnel at 550 rev/min. (a) What is the linear speed of the blade tip, in m/s? (b) What is the radial acceleration of the blade tip expressed as a multiple of g?
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An index has a market value of $689,400 at the beginning of the period and $722,009 at the end of the period. If you want the beginning index value to be 100, what is the ending index value?
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The solution to the equation A/2= -5
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A chemical plant has an emergency alarm system. When an emergency situation exists, the alarm sounds with probability 0.95. When an emergency situation does not exist, the alarm sounds with probability 0.02. A real emergency situation is a rare event, with probability 0.004. Given that the alarm has just sounded, what is the probability that a real emergency situation exists
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What is a real life word problem for the equation y=2x Will give brainliest
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A West Virginia coal is burned at a rate of 8.02 kg/s. The coal has a sulfur content of 4.40 % and the bottom ash contains 2.80 % of the input sulfur. What is the annual rate (in kg/yr) of stack emissions of SO2
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Calcium nitrate and ammonium fluoride react to form calcium fluoride, dinitrogen monoxide, and water vapor. How many grams of dinitrogen monoxide are present after 31.3 g of calcium nitrate and 38.7 g of ammonium fluoride react completely? Hint: Write a balanced chemical reaction first, then find which one is the limiting reactant.
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According to the typical corporate security classification scheme ________ information is not normally released to the general public but may be disclosed without damaging the company.
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Although beginning salaries vary greatly according to your field of study, the equation s = 2806.6t + 32,558 can be used to approximate and to predict averagebeginning salaries for candidates with bachelor's degrees. The variable s is the starting salary and t is the number of years after 1995. Approximate whenbeginning salaries for candidates will be greater than $60,000Beginning salaries for candidates will be greater than $60,000 in the year(Round to the nearest whole year.)
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Daniel, the owner of a bookstore, decides to reinvest his personal profits from the current fiscal year toward renovating the store and expanding its inventory. In the context of owners' equity, the profits that Daniel reinvests in the bookstore are called:A. bonus shares.B. retained earnings.C. current liabilities.D. equity releases.
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The system of equations 2y = 14 - 2x and y = -x + 7 is graphed what is the solution to the system of equations q
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Explain what externalities are. Give at least two examples of positive and negative externalities to a new downtown stadium for the Columbus Crew.
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Two balanced three-phase loads that are connected in parallel are fed by a three-phase line having a series impedance of (0.4+????2.7) per phase. One of the loads absorbs 560 kVA at 0.707 power factor lagging, and the other 132 kW at unity power factor. The line-to-line voltage at the load end of the line is 22003 V. Compute (a) the line-to-line voltage magnitude (in RMS value) at the source end of the line, (b) the total real and reactive power losses in the three-phase line, and (c) the total real and reactive power supplied at the sending end of the line.
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Consider a horizontal semi-transparent plate at a temperature 360 K that is irradiated from above and below. Air at [infinity] 310 K flows over both sides of the plate with a convective coefficient, 45 W/m2K. The absorptivity of the plate is 0.4. If the radiosity is 4500 W/m2, find the irradiation, in W/m2, and emissivity of the plate. Is the plate diffuse-gray?
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Early Mycenaean civilization was based on which political rule? a. warrior oligarchy b. democracy c. regional monarchy d. centralized monarchy e. theocracy
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According to Callahan, why does a party of the Hamptons give us insight into social inequality and many Americans' anger at politicians?
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evaluate cos(tan^-1(4)). Can someone help me for this one? I kinda confused. Please ASAP!!!!
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As an athlete exercises, sweat is produced and evaporated to help maintain a proper body temperature. On average, an athlete loses approximately 443 g of sweat during an hour of exercise. How much energy is needed to evaporate the sweat that is produced? The heat of vaporization for water is 2257 J/g.
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Whose view was that the Cosmos was based on the belief that every occurrence in the physical universe had logos behind it and that is where life originated?
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On March 12, Medical Waste Services provides services on account to Grace Hospital for $9,200, terms 3/10, n/30. Grace pays for those services on March 20. Required: For Medical Waste Services, record the service on account on March 12 and the collection of cash on March 20. (If no entry is required for a transaction/event, select "No journal entry required" in the first account field.)
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Suppose that diastolic blood pressure readings of adult males have a bell-shaped distribution with a mean of 84 mmHg and a standard deviation of 9 mmHg. Using the empirical rule, what percentage of adult males have diastolic blood pressure readings that are greater than 102 mmHg? Please do not round your answer.
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Consider this change to that situation. You charge the balls so that they hang a distance r apart. Then you step out to get a drink of water, and when you return, you find the distance between the pith balls is half what it was before you got a drink. In terms of the length L, the charge Q, and the original angle , find the new charge on the pith balls and the new angle at which they hang. To receive credit, you must show your work. (10 pts each)
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For each of the following, give the sublevel designation, the allowable ml values, and the number of orbitals:(a) n = 4, l = 2(b) n = 5, l = 1(c) n = 6, l = 3
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A particle moves along a straight line and its position at time t is given by s(t)=t4?7t+22,t?0. where s is measured in feet and t in seconds.(A) Find the velocity at time t: (B) Find the velocity (in ft/sec) of the particle at time t=3. (C) Find all values of t for which the particle is at rest. (If there are no such values, enter none . If there are more than one value, list them separated by commas.)t = (D) Use interval notation to indicate when the particle is moving in the positive direction. (If needed, enter inf for ?. If the particle is never moving in the positive direction, enter none .) (E) Find the total distance traveled during the first 8 seconds.
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