Module 4 - Chapter Quiz_ PHYS 102 Explorations in Physics - Oct 2023 - Online_2ndAttempt

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11/8/23, 7:45 PM Module 4 - Chapter Quiz: PHYS 102 Explorations in Physics - Oct 2023 - Online https://erau.instructure.com/courses/164880/quizzes/575476 1/5 Due Nov 12 at 11:59pm Points 100 Questions 10 Available after Nov 6 at 12am Time Limit None Allowed Attempts 3 Instructions Attempt History This quiz is intended to test you on the information you have acquired in this module. Before starting the quiz, make sure you have completed all module activities with additional emphasis on the following: Read Chapter 4 and be sure you understand the solved problems in the chapter. If you have not already, actively (with paper and pencil) work through the Module 1 first video (entitled Solving Physics Problems) that introduces the 5-step problem-solving technique used throughout this course. This module's additional videos are also helpful. Successfully complete the problems in the textbook End-of-Chapter Problems section. This is an essential step in preparing for this Chapter Quiz. The End-of-Chapter Questions section is also helpful. Quiz Instructions 1. Use 9.8 m/s for g (the acceleration due to gravity). 2. Use the conversion factors found in the back of the textbook (not those found on the internet). 3. Answers should be solved in SI units unless other instructions are given in the question. 4. Do not include units in your answer ( numbers only ). 5. Express answers to 3 significant figures unless other instructions are given in the question. 6. To enter an answer in scientific notation in Canvas, use lower-case "e". For example, 6.02 x 10 would be entered as 6.02e+23. A. "+" is optional for positive exponents. B. Do not include spaces in your answer. Questions are presented one at a time. Use caution in navigating back to a previous question – answers are only saved by selecting the Save button or navigating forward to the next question. Attempts: You will have three attempts to take this quiz. After a first wrong answer a hint is provided to help get started but additional steps, including unit conversions, may be needed. Time limit: None Quiz Review: After submitting your quiz, check your results. Incorrect answers will be marked, but the correct answers to those questions will not be shown until your final attempt.  This activity supports Module Objective(s) 1-10 and Learning Outcome(s) 2-4. (https://erau.instructure.com/courses/164880/pages/module-4-overview-and-objectives) Module 4 The Physics of Matter Chapter Quiz 2 23 Take the Quiz Again

11/8/23, 7:45 PM Module 4 - Chapter Quiz: PHYS 102 Explorations in Physics - Oct 2023 - Online https://erau.instructure.com/courses/164880/quizzes/575476 2/5 Attempt Time Score KEPT Attempt 2 39 minutes 80 out of 100 LATEST Attempt 2 39 minutes 80 out of 100 Attempt 1 41 minutes 70 out of 100  Correct answers are hidden. Score for this attempt: 80 out of 100 Submitted Nov 8 at 10:44pm This attempt took 39 minutes. 10 / 10 pts Question 1 The wing of an airplane has an average cross-sectional area of 11 m and experiences a lift force of 114,641 N. What is the average difference in the air pressure between the top and bottom of the wing (in N/m )? 2 2 10,421 10 / 10 pts Question 2 A storage tank 24.6 m high is filled with pure water. Assuming the tank is open and exposed to the atmosphere at the top, find the gauge pressure at the bottom of the tank (in N/m ). Use eBook Table 4.4. 2 241,326 10 / 10 pts Question 3 A dentist's chair with a person in it weighs 2,088 N. The output plunger of a hydraulic system starts to lift the chair when the dental assistant's foot exerts a force of 55 N on the input piston. Neglecting any difference in the heights of the piston and the plunger, what is the ratio of the area of the output plunger to the area of the input piston? 38.11

11/8/23, 7:45 PM Module 4 - Chapter Quiz: PHYS 102 Explorations in Physics - Oct 2023 - Online https://erau.instructure.com/courses/164880/quizzes/575476 3/5 10 / 10 pts Question 4 The diameter of the small piston of a hydraulic press is 3.7 cm and the diameter of the large piston is 51.4 cm. What force (in N) on the small piston will support 15,618 N on the large piston? 80.93 10 / 10 pts Question 5 The volume of helium in a particular blimp (nonrigid airship) is 5,379 m . Using eBook Table 4.4, calculate the mass of helium in the blimp (in kg). 3 968.22 10 / 10 pts Question 6 A certain part of an aircraft engine has a volume of 2.2 ft . If the part is made of aluminum, calculate the weight of the part (in lbs). Use eBook Table 4.4. 3 370.82 0 / 10 pts Question 7 Incorrect Incorrect A large rectangular slab of aluminum with dimensions 1.9 x 0.8 m by 0.24 m is placed on the ground on its greatest area. Using eBook table 4.4, what pressure does the slab exert on the ground (in N/m ). 2

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11/8/23, 7:45 PM Module 4 - Chapter Quiz: PHYS 102 Explorations in Physics - Oct 2023 - Online https://erau.instructure.com/courses/164880/quizzes/575476 4/5 6,015.79 The following general hints are provided, if needed. Please note that unit conversions, if necessary, may not be included in the hints. Given: Length = L Width = w Thickness (height) = h Density of aluminum = D Find: Pressure = P Use: P = F/A = Weight/Area = (D x V )/Area Volume = L x w x h Al Al Al 10 / 10 pts Question 8 A boat (with a flat bottom) and its cargo weigh 3,920 N. The area of the boat’s bottom is 3.5 m . How far below the surface of the water is the boat’s bottom when it is floating in pure water (in m)? Use eBook Table 4.4. 2 0.114 10 / 10 pts Question 9 A bicycle tire pump has a piston with area of 0.36 in . If a person exerts a force of 24 lb on the piston while inflating a tire, what pressure does this produce on the air in the pump (in lbs/in )? 2 2 66.67

11/8/23, 7:45 PM Module 4 - Chapter Quiz: PHYS 102 Explorations in Physics - Oct 2023 - Online https://erau.instructure.com/courses/164880/quizzes/575476 5/5 0 / 10 pts Question 10 Incorrect Incorrect A juniper wood plank measuring 0.28 ft by 1.1 ft by 22.3 ft is totally submerged in pure water. What is the magnitude of the buoyant force acting on it (in N)? Use eBook Table 4.4. 1,931 The following general hints are provided, if needed. Please note that unit conversions, if necessary, may not be included in the hints. Given: Thickness (height) of plank = h Width of plank = w Length of plank = L Weight density of water = D Find: Weight of water displaced = W Use: Buoyant force = weight of water displaced (Archimedes' principle) Weight of water displaced = D x Volume = D x Volume (because plank is fully submerged) Buoyant force = D x h x w x l (in lbs if D is weight density) Buoyant force = convert lbs to newtons water water water water water plank water water Quiz Score: 80 out of 100

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