Module 7 - Second Summative Exam_ PHYS 102 Explorations in Physics - Oct 2023 - Online

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12/2/23, 9:25 PM Module 7 - Second Summative Exam: PHYS 102 Explorations in Physics - Oct 2023 - Online https://erau.instructure.com/courses/164880/quizzes/575407 1/11 Due Dec 3 at 11:59pm Points 100 Questions 25 Available after Nov 27 at 12am Time Limit 150 Minutes Instructions What is the second summative exam? The second summative exam tests your knowledge of the concepts introduced in the previous three modules (Modules 4, 5, and 6). As the current module (Module 7) introduces new topics that are not included in the second summative exam (but will appear in Modules 8 and 9 quizzes), you are encouraged to complete the second summative exam early in this module. What's on the second summative exam? The second summative exam consists of 25 multiple-choice questions drawn from test banks of similar questions. Therefore, no two exams are identical. The second summative exam is not a repeat of the Chapter Quiz problems. Instead, the summative exam assesses understanding of physics concepts, graphs, and simple problem-solving. How should you prepare for the second summative exam? Exam preparation suggestions include: Make sure you have read and understood the textbook Chapters 4, 5, and 6. Answer questions from the End-of-Chapter Questions sections (note that the End-of-Chapter Questions sections are different than the End-of-Chapter Problems sections). This is an essential step in preparing for this exam . The End- of-Chapter Questions sections emphasize understanding concepts and help prepare for the multiple-choice and true- false questions included in the summative exam. It's always a good idea before an exam to give yourself a practice exam using questions you have not previously seen (i.e., save some of the End-of-Chapter Questions for a practice exam). This simulates exam conditions much better than merely reviewing questions you have already solved. Overstudy! It's always better to walk out of an exam thinking "The exam wasn't as hard as I thought", than "I should have studied more." Exam Instructions 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. Time limit: There is a 2.5-hour time limit and at the end of the 2.5 hours, the exam will close and be automatically submitted for grading. You will get a notification pop-up approximately 10 seconds before time expires. If you leave the exam for any reason, the timer will continue and the exam will automatically submit when time is up. If you lose your internet connection, you may reconnect and return to the exam where you left off as long as time has not expired. If you encounter technical difficulties, please contact your instructor. Show Work submission: Within 30 minutes of completing the exam, you are required to upload a "Show Work" document through the Assignment that comes next in this module. The purpose of this document is to demonstrate the processes and steps you used to solve the questions on the exam. The answers on the show work document must match the Canvas Module 7 Electricity Second Summative Exam
12/2/23, 9:25 PM Module 7 - Second Summative Exam: PHYS 102 Explorations in Physics - Oct 2023 - Online https://erau.instructure.com/courses/164880/quizzes/575407 2/11 Attempt History Attempt Time Score LATEST Attempt 1 56 minutes 96 out of 100 Correct answers are hidden. Score for this quiz: 96 out of 100 Submitted Dec 3 at 12:25am This attempt took 56 minutes. exam answers. Partial credit for some problem-solving questions may be possible after the instructor has had time to review your show work document(s). Remember the Student Honor Code: “I will hold myself to the highest standards of personal honesty and ethical behavior in my academic work.” This activity supports Module Objective(s) 12 and Learning Outcome(s) 2-4. (https://erau.instructure.com/courses/164880/pages/module-7-overview-and-objectives) 4 / 4 pts Question 1 The ratio of the density of a material to the density of water is the mass density. the weight density. the specific gravity. the buoyant force. none of the above. 4 / 4 pts Question 2 When a 4-cubic-ft block of wood floats in a fluid whose weight density is 60 pounds per cubic foot, 3/4 of the block’s volume is submerged. The buoyant force on the block is 60 lbs. 120 lbs.
12/2/23, 9:25 PM Module 7 - Second Summative Exam: PHYS 102 Explorations in Physics - Oct 2023 - Online https://erau.instructure.com/courses/164880/quizzes/575407 3/11 180 lbs. 240 lbs. none of the above. 0 / 4 pts Question 3 Incorrect Incorrect A person weighing 200 pounds stands on snowshoes. If the area of each snowshoe is 400 square inches, the pressure on the snow is 0.25 psi. 0.5 psi. 2 psi. 4 psi. none of the above. 4 / 4 pts Question 4 Two pistons push down on the fluid filling two cylinders connected by a narrow hose, as shown in the figure. The area A 1 is 1 square inch, and the area A 2 is 10 square inches. A force of 4 pounds is exerted downward on piston 1, as shown. The pressure on A 1 in psi is
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12/2/23, 9:25 PM Module 7 - Second Summative Exam: PHYS 102 Explorations in Physics - Oct 2023 - Online https://erau.instructure.com/courses/164880/quizzes/575407 4/11 0.25. 0.4. 4. 10. 40. 4 / 4 pts Question 5 Normal atmospheric pressure is 14.7 psi. 1 N/m . 2 zero. 760 mm of mercury. 101,000 pascals. none of the above. 4 / 4 pts Question 6 The hydraulic system in modern aircraft is an example of: Bernoulli’s principle. Pascal’s principle. Archimedes’ principle. Galileo’s principle. 4 / 4 pts Question 7
12/2/23, 9:25 PM Module 7 - Second Summative Exam: PHYS 102 Explorations in Physics - Oct 2023 - Online https://erau.instructure.com/courses/164880/quizzes/575407 5/11 The buoyant force that keeps a ship afloat is an example of Archimedes’ principle. Pascal’s principle. Bernoulli’s principle. Torricelli’s principle. none of these principles. 4 / 4 pts Question 8 If pressure inside a cylinder with a circular hatch is 2 atm and the radius of the entrance hatch is 12 inches, what force does the air exert on the hatch? Recall that the area of a circle is πr 2 24 lb 288 lb 904.8 lb 1,300.6 lb 13,300.6 lb 4 / 4 pts Question 9 In the first law of thermodynamics, the work can be only positive. only negative. neither. either positive or negative.
12/2/23, 9:25 PM Module 7 - Second Summative Exam: PHYS 102 Explorations in Physics - Oct 2023 - Online https://erau.instructure.com/courses/164880/quizzes/575407 6/11 4 / 4 pts Question 10 Which are bigger—Celsius degrees or Fahrenheit degrees? Fahrenheit Celsius Neither—they are the same size. This is a nonsensical comparison. 4 / 4 pts Question 11 Which mechanism(s) of heat transfer will work in a vacuum? conduction convection radiation none of the above 4 / 4 pts Question 12 The coefficient of linear expansion of ordinary glass is three times that of Pyrex glass. An ordinary glass rod and a Pyrex glass rod of equal lengths at room temperature are dropped into boiling water. The change in length of the ordinary glass rod will be ___________ the change in length of the Pyrex glass rod. 1/9 1/3 equal to 3 times 9 times
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12/2/23, 9:25 PM Module 7 - Second Summative Exam: PHYS 102 Explorations in Physics - Oct 2023 - Online https://erau.instructure.com/courses/164880/quizzes/575407 7/11 4 / 4 pts Question 13 The specific heat capacity of copper is three times the specific heat capacity of lead. Equal masses of copper and lead are heated from room temperature to the temperature of boiling water. To achieve this, the amount of heat added to the copper is ___________ the amount of heat added to the lead. 1/9 1/3 equal to 3 times 9 times 4 / 4 pts Question 14 When ice melts, its temperature increases. decreases. stays constant. cannot be determined. 4 / 4 pts Question 15 Air at a temperature of 32° F has a relative humidity of 60%. If the temperature of the same air rises to 40° F, the relative humidity stays the same. increases. decreases.
12/2/23, 9:25 PM Module 7 - Second Summative Exam: PHYS 102 Explorations in Physics - Oct 2023 - Online https://erau.instructure.com/courses/164880/quizzes/575407 8/11 cannot be determined. 4 / 4 pts Question 16 The efficiency of a heat engine can never exceed the Carnot efficiency. can be improved by lowering the temperature of the cool reservoir. can be improved by raising the temperature of the hot reservoir. all of the above 4 / 4 pts Question 17 The wavelength of the wave shown in this figure is about 2 m. 1.75 m. 0.33 m. not defined. slightly over 5 m. 4 / 4 pts Question 18
12/2/23, 9:25 PM Module 7 - Second Summative Exam: PHYS 102 Explorations in Physics - Oct 2023 - Online https://erau.instructure.com/courses/164880/quizzes/575407 9/11 In the upper atmosphere at altitudes where commercial airlines travel, we find extremely cold temperatures. What is the speed of sound (in metric units) for a temperature of –49.0 C? o 984.9 m/s 300.8 m/s 344.7 m/s 140.7 m/s 4 / 4 pts Question 19 When a force F stretches a rope of mass per unit length ρ , the velocity of a wave in the rope is given by You have two ropes of the same length. The mass of the second rope is twice the mass of the first rope. The velocity of a wave in the second rope is ___________ the velocity of a wave in the first rope. 1/2 times the same as times 2 times 4 / 4 pts Question 20 A sound level of 80 dB has ___________ the amplitude of a 60 dB sound. ten times twenty times one tenth twice
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12/2/23, 9:25 PM Module 7 - Second Summative Exam: PHYS 102 Explorations in Physics - Oct 2023 - Online https://erau.instructure.com/courses/164880/quizzes/575407 10/11 4 / 4 pts Question 21 A sound with ten times the amplitude of another sound is judged to be twice as loud. ten times as loud. 10 dB higher in sound level. 20 dB higher in sound level. 4 / 4 pts Question 22 A wave moves in a rope with a certain wavelength. A second wave is made to move in the same rope with twice the wavelength of the first wave. The frequency of the second wave is _______________ the frequency of the first wave. 1/2 the same as 2 times unrelated to 4 / 4 pts Question 23 A source emits sound at a fixed constant frequency f . If the source moves away from you, the frequency you hear is the same as f. higher than f. lower than f.
12/2/23, 9:25 PM Module 7 - Second Summative Exam: PHYS 102 Explorations in Physics - Oct 2023 - Online https://erau.instructure.com/courses/164880/quizzes/575407 11/11 unrelated to f. 4 / 4 pts Question 24 When two identical waves arrive at the same place in phase, there is constructive interference. destructive interference. diffraction. a Doppler effect. a shock wave. 4 / 4 pts Question 25 A zero decibel sound level has zero amplitude. is nonsense. is just at the threshold of hearing. none of the above Quiz Score: 96 out of 100

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