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1.If I throw 2 dices I have a 6/36 chance of getting two equal numbers. Let's say I have two chances ...

to succeed in doing so instead of one, what is the odds? And what about 3 chances?
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2.The mean and median of Bens’s observations both equal . The mean and median of Leslie’s observations both ...

ations both equal . Ron combines Ben’s and Leslie’s data into one collection of observations. Demonstrate, by an explicit example, that there is not enough information to determine Ron’s median.
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3.A 200.0 MeV photon is absorbed by a particle of ...

x.(a.) What is the mass (rest energy) of the particle after the collision in MeV? (b.) Show numerically that the gain in rest energy is equal to the photon’s energyminus the particle’s kinetic energy after the collision.
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4.AP Chem AB FRQ Question 1 A sample consisting of 50. mL of 0.400 M solution of the acid, HClO4, is titrated ...

titrated with a 0.200 M solution of the base, LiOH. Write the balanced chemical reaction for neutralization reaction: HClO4 (aq) + LiOH (aq) → LiClO4 (aq) + H2O (l) Write the NET ionic equation for the neutralization reaction. OH⁻ (aq) + H⁺ (aq) → H2O (l) Compute the pH of the titration solution. Show your work i) before any of the base is added ii) after 25. mL of base is added iii) after 50. mL of base is added A student performs the titration with the same chemicals but with smaller volumes of each chemical . Which of the following titration curves could represent the titration. Explain A because this entails a strong acid and a strong base. Question 2 A student performs a titration of an unknown acid with a strong base and gets the following titration curve: a) The student consults the list of pKa of acids shown below. If the acid is listed in the table below, which is the most likely identity of the unknown acid? Explain. Acid Ka HF 7.2 x 10-4 CH3COOH 1.8 x 10-5 H2CO3 4.3 x 10-7 HBrO 2.0 x 10-9 The unknown acid is HBrO because the calculated Ka is in between 50^-4 and 50^-6 and 2.0 x 10^-9 lies in between them. b) What is the initial molarity of the acid? 10^-3 = 0.001M Question 3 a) Describe the components and the composition of an effective buffer solution. Explain how the components of the buffer allow the buffer to maintain its pH. An effective buffer solution has a weak acid and its conjugate base or a weak base and its conjugate acid. A buffer solution is most effective when the ratio of its component concentrations is close to 1, also when the pH is equal to the pka of the acid.; The components of the buffer allow the buffer to maintain its pH because buffers can absorb excess H+ions or OH– ions. An employer is interviewing four applicants for a job as a laboratory technician and asks each how to prepare a buffer solution with a pH of 5.0. The following constants may be helpful: hydrazoic acid, pKa = 4.74 Boric acid, pKa = 9.23 Archita A. says she would mix equal molar solutions of hydrazoic (HN3) and sodium azide (NaN3) solutions. Bradley B. says she would mix equimolar Boric acid (H3BO3) and HCl solutions. Carlos C. says he would mix equimolar Boric Acid (H3BO3) and sodium dihydrogen borate (NaH2BO3) solutions. Delia D. says he would mix equimolar hydrazoic Acid (HN3) and NaOH solutions. b) Which of these applicants has given an appropriate procedure? Explain your answer Delia because she is using Sodium hydroxide which results in a pH of 5. NaOH is a strong base and in order to have an effective buffer a weak acid must be incorporated which is the HN3. c) Explain what is wrong with the erroneous procedures. The rest all incorporate a strong acid and a strong base or a weak acid and a weak base which don’ result in an effective buffer. d) The applicants have access to the 1 Liter volumes of each of the solutions listed above. They have access to graduated cylinders. In order to make 1.0 Liter of the correct 5.0 buffer solution, what volumes of the two chemicals must be mixed?
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5.Satellite A with mass m orbits the Earth at a distance r from the center of the planet. Satellite B with ...

B with mass 2m orbits the Earth at a distance r from the center of the planet. Is the orbital period of Satellite A less than, equal to, or greater than the orbital period of Satellite B? Explain, using equation(s) if needed to support your answer. A correct answer with no explanation will receive no credit.
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6.Here is the topic, along with the assignment instructions: Doctors who sit on the National Comprehensive Cancer Network (NCCN) guideline panels ...

hensive Cancer Network (NCCN) guideline panels are allowed to receive up to $20,000 per year in payments from a single pharmaceutical or medical device company or $50,000 in the aggregate per year. Specifically, the NCCN website states the following: "If an NCCN Guidelines Panel Member or prospective Member or an NCCN Guidelines Steering Committee Member or prospective Member has an equal to or greater than $20,000 conflicting interest from at least one single external entity, including the sum of income and equity holdings from said entity, or if their aggregate conflicting interest from all external entities is equal to or greater than $50,000 per year, the Member or proposed appointee will be deemed ineligible for continued service or for appointment." Some experts claim that these thresholds are way too high, and that NCCN guideline panelists should only be doctors who don't receive any money or funding from pharma whatsoever. But Dr Robert Carlson, the CEO of NCCN, defends the organization's current policy saying that tightening the rules would lead to exclusion of best experts in oncology and ultimately affect the quality of the guidelines. Write a research paper that examines this question: Should NCCN panelists be allowed to receive any money or funding from pharmaceutical or/and medical device companies while serving on the panels? Support your stance on the issue with solid evidence from eight or more reputable sources and use APA citation style, 7th edition, for the assignment. Make sure your paper includes a title page on page 1 and an abstract on page 2, and is formatted in accordance with APA. Finally, please include an "Opposition" section in your paper where you will acknowledge and explain the views of people who would disagree with you.
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7.Base class Account should include: i) one private instance variable of type string to represent the account number (accNumber). ii) one private ...

account number (accNumber). ii) one private instance variable of type decimal to represent the account balance. 2) The Account class should provide a constructor with two parameters: i) first parameter to receive account number and uses it to initialize the private instance variable using public property AccNumber. ii) second parameter that receives an initial balance and uses it to initialize the private instance variable using a public property Balance. The property Balance should validate the initial balance to ensure that it is greater than or equal to 0.0; if not, ignore the initial balance and display the message "Account initial balance amount should be a positive value." The Account class should also provide a get accessor in property Balance that returns the current balance. 3) The class Account should provide two public methods. i) Method Credit should add an amount to the current balance.
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8.A small publishing company is planning to publish a new book. The production costs will include one-time fixed costs (such ...

time fixed costs (such as editing) and variable costs (such as printing). The one-time fixed costs will total $27,120. The variable costs will be $8.75 per book. The publisher will sell the finished product to bookstores at a price of $18.75 per book. How many books must the publisher produce and sell so that the production costs will equal the money from sales?
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1.AU MAT 120 Systems of Linear Equations and Inequalities Discussion

mathematicsalgebra Physics