Module 7 - Concept Check: PHYS 123 Science of Flight - Oct 2023 - Online

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Embry-Riddle Aeronautical University *

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123

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Mechanical Engineering

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Jan 9, 2024

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pdf

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11

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Due Dec 3 at 8:59pm Points 100 Questions 15 Available Nov 26 at 9pm - Dec 3 at 8:59pm Time Limit None Allowed Attempts 2 Instructions
The purpose of the concept checks is to evaluate your grasp of the basic module content and to allow you to practice written communication, quantitative reasoning, problem-solving, and real-world application. The concept checks are untimed open book/open notes quizzes, containing multiple-choice, matching, numerical answer questions, that will focus on your comprehension, application, and analysis of the material. Quiz questions are presented one at a time. Use caution in navigating back to a previous question – answers are only saved by selecting Save or navigating forward to the next question. Attempts: You will have two attempts; the higher scoring attempt will be your final score. Questions are pooled, so you will not see the same questions on different attempts. Time limit: None Grading: All questions are scored immediately after quiz submission. Quiz Review: You will be able to review the quiz questions, your answers, and automatic feedback once , immediately after submitting the quiz. Incorrect answers will be marked, but the correct answers to those questions will not be shown. Contact your instructor for clarification on incorrect answers if needed. Tips for Success Review all content and resources provided in the module lesson. Ask questions. Use the Online Office or email your instructor. Even though the quiz is not due until the end of the module, preparing for and taking the first attempt early in the module is highly recommended. Immediately after submitting the first attempt, you will have one opportunity to review your submission to see which questions you got wrong. Taking the first attempt early allows time to seek or ask for clarification on the wrong answers prior to taking the second attempt. Knowledge Assessment This activity supports Module Objectives 1, 3, 4, 5, and 6 Learning Outcome 7. (https://erau.instructure.com/courses/164450/pages/module-7-overview-and-objectives) Module 7 Concept Check
Attempt History Attempt Time Score LATEST Attempt 1 60 minutes 95 out of 100 Correct answers are hidden. Score for this attempt: 95 out of 100 Submitted Nov 30 at 7:51pm This attempt took 60 minutes. Take the Quiz Again 7.5 / 7.5 pts Question 1 Applying what was presented in the video "Predicting Bond Type" in the Module 7 Lesson "Aluminum, Alloys, and Corrosion": The bonds between the atoms of an aluminum oxide (Al O ) molecule are: 2 3 metallic none of these are correct covalent ionic 7.5 / 7.5 pts Question 2
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According to the video "Predicting Bond Type" in the Module 7 Lesson "Aluminum, Alloys, and Corrosion": Which of the following are properties of metals? (Choose all that apply.) brittle conduct electricity shiny low density solid at room temperature 7.5 / 7.5 pts Question 3 According to the video "Predicting Bond Type" in the Module 7 Lesson "Aluminum, Alloys, and Corrosion": Most of the atoms on the period table are classified as metals. True False 7.5 / 7.5 pts Question 4
Answer 1: Answer 2: Answer 3: Aluminum is a [ Select ] . In its solid state, it is [ Select ] with [ Select ] structure. metal crystalline face-centered cubic 7.5 / 7.5 pts Question 5 Which of the following describe properties of aluminum? (choose all that apply) malleable does not react with oxygen crystal structure in solid form brittle efficiently recyclable
5 / 5 pts Question 6 What is the primary cause of static electricity on aircraft? radio frequency interference friction between the aircraft and air corona discharge charge accumulation due to lightning strikes 0 / 5 pts Question 7 Incorrect Incorrect Which of the following conditions would be least likely to cause static electricity to accumulate on aircraft? warm air with humidity >50% but no precipitation cold air with humidity >20% cold air with ice crystals and humidity <20% Refer to the Module 7 Lesson "Electricity and Aircraft." 5 / 5 pts Question 8
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Answer 1: Answer 2: Answer 3: Answer 4: Based on your experiments with the Balloons and Static Electricity simulation (PhET), complete the following sentences: The initial charge of the balloon is [ Select ] . When this balloon is placed near the wall, It stays where it is placed (because buoyant forces are ignored in this simulation) . Once the balloon is rubbed on the sweater, [ Select ] charges are transferred to the [ Select ] . neutral It stays where it is placed (because buoyant forces are ignored in this simulation) negative balloon 5 / 5 pts Question 9
Answer 1: Answer 2: Answer 3: Based on your experiments with the John Travoltage simulation (PhET), complete the following sentences: When John's foot is dragged across the carpet, [ Select ] charges accumulated [ Select ] . When his hand is moved near the metal doorknob, the negative charges moved through his body towards the point nearest the doorknob . negative on John's body the negative charges moved through his body towards the point nearest the doorknob 7.5 / 7.5 pts Question 10 What is the primary result of static electricity discharge that is problematic for aircraft? light pollution burned circuits
radio frequency interference structural integrity failure 7.5 / 7.5 pts Question 11 Katunin et al. (2016) refer to some aircraft material as dielectric. The authors present pictures of a lightning strike producing a burned area. What was the aircraft material of concern? aluminum alloy wood framing steel alloy epoxy resin 7.5 / 7.5 pts Question 12 A copper pipe at an airport hanger has been corroded by water, releasing copper ions into solution. If this water is used to rinse an aircraft with an aluminum skin, what type of corrosion could result? galvanic corrosion stress corrosion direct chemical attack
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deposition corrosion 7.5 / 7.5 pts Question 13 Answer 1: Answer 2: According to the video "Redox Reactions, Crash Course Chemistry #10" in the Module 7 Lesson "Aluminum, Alloys, and Corrosion": electrons are what make it possible for atoms to bond to form molecules, and when this takes place, a tremendous amount of energy can be exchanged. electrons energy 7.5 / 7.5 pts Question 14 A ______ contains two or more distinct individual materials. composite metal alloy
5 / 5 pts Question 15 What type of polymer can be melted and reformed? thermoset thermodynamic thermoplastic thermocyclic Quiz Score: 95 out of 100