2023 physics 1 frq - The AP Physics 1 Exam Format is: Multiple Choice Section. -50 Multiple Choice questions. -90 minutes. -50% of exam score. Part A of the multiple choice section has 45 standard type questions. Part B has 5 multi-select questions includes multi-corrections questions in which you need to select 2 correct answers. Free Response Section.

 
2022-2023 Unit 3 - WEP and Momentum FRQ. AP Physics 1 Page 5 of 32. 5. A small block of mass M is released from rest at the top of the curved frictionless ramp shown above. The block slides down the ramp and is moving with a speed 3 0 when it collides with a larger block of mass 1 at rest at the bottom of the incline. . Credit acceptance email address

QUESTION 3. on this page. 3. The circuit shown consists of a battery of emf Ɛ, resistors 1 and 2 each with resistance R, capacitors 1 and 2 with capacitances C and 2 C, respectively, and a switch. The switch is initially open and both capacitors are uncharged. At time t 0, the switch is closed to Position A.The fifth point was earned for a response that states, “the object with a higher v0 will travel faster & therefore further.”. The sixth point was earned for meeting the requirements for a paragraph-length response. 2022 College Board. Visit College Board on the web: collegeboard.org. AP® Physics 1: Algebra-Based 2022 Scoring Commentary.Yes. AP Classroom resources will be updated for the 2024-25 school year, including AP Daily videos, progress checks, topic questions, and an updated question bank. Most resources will be available on July 1, 2024, when AP Classroom updates to the next school year. Additional resources will be released on a rolling basis throughout the school year.QUESTION 3. on this page. 3. The circuit shown consists of a battery of emf Ɛ, resistors 1 and 2 each with resistance R, capacitors 1 and 2 with capacitances C and 2 C, respectively, and a switch. The switch is initially open and both capacitors are uncharged. At time t 0, the switch is closed to Position A.Walkthrough of the 2023 AP Physics C Mechanics (Set 2)Website: http://www.bothellstemcoach.comPDF Solutions: https://www.bothellstemcoach.com/post/2023-ap-fr...The other point was not earned because the response does not show an x versus t curve that is concave up and has an initially negative slope. Visit College Board on the web: collegeboard.org. AP® Physics 1: Algebra-Based 2023 Scoring Commentary. Question 2 (continued) Sample: 2B.A physical altercation is defined as being an argument, dispute or altercation that involves force or physical aggression. Physical altercations differ from verbal altercations bec...In fiction, the physical setting is where a story takes place. Stories also have a chronological setting, or the time when the story takes place, and a social setting. A story’s ph...Once upon a time, if you wanted to learn about a topic like physics, you had to either take a course or read a book and attempt to navigate it yourself. A subject like physics coul...1 point. Example Response. There are no external forces on the system and no energy is dissipated by friction, so the total mechanical energy stays the same. Total for part (b) 1 point. ©2022 College Board AP® Physics 1: Algebra-Based 2022 Scoring Guidelines. (c) For a final bar chart where both.Advanced Placement (AP) Physics 1 is a year-long introductory physics course administered by the College Board as part of its Advanced Placement program. It is intended to proxy a one-semester algebra-based university course in mechanics.Along with AP Physics 2, the first AP Physics 1 exam was administered in 2015.. In its first five …Take an AP Physics 1 Exam from a previous year & score yourself Rotational Energy and Momentum Practice with Mock FRQ Take 2–3 AP Physics 1 FRQs from previous years & score yourself Take an AP Physics 1 Exam from a previous year & score yourself Live Review (date & time TBD) Live Review (date & time TBD) Live Review (date & time TBD)2024 AP Physics 1 exam study guides, practice quizzes, live reviews, community support | Fiveable ... Unit 2 FRQ (Dynamics) 3 min read. Unit 5 FRQ (Momentum) Answers.May 7, 2021 ... Walkthrough of the 2021 AP Physics 1 Free Free Response #4 (May 5, 2021 administration). ✓ Join My Discord Study Server: ...2022-2023 Unit 3 - WEP and Momentum FRQ. AP Physics 1 Page 1 of 97. ... 2022-2023 Unit 3 - WEP and Momentum FRQ. AP Physics 1 Page 17 of 97. 4. The figure above shows part of a system consisting of a block at the top of an inclined plane that rests on a table, which is located on Earth. The block and plane are at rest when the block is …Fmax = 192000(0.25 s) 2 − 96000(0.25 s) ∴ Fmax = 12,000 N. AP® Physics C: Mechanics 2023 Scoring Guidelines. (b)(ii) For a curve that increases and then decreases in value that is only concave down For a labeled maximum value consistent with the calculated value in part (b)(i) For the graph having values of 0 N at t = 0s and t = 0. 5s.cos. tan. Directions: Questions 1, 4 and 5 are short free-response questions that require about 13 minutes each to answer and are worth 7 points each. Questions 2 and 3 are long free-response questions that require about 25 minutes each to answer and are worth 12 points each. Show your work for each part in the space provided after that part.to gravity. Fn , FN , N , “normal force”, “ground force”, or similar labels may be used for the normal force. Scoring Note: A response that includes extraneous vectors can earn a maximum of 1 point. Scoring Note: Horizontally displacing the F. N and Fg vectors slightly is permitted in order to.Total for part (d) Total for question 1. AP® Physics C: Mechanics 2023 Scoring Guidelines. (d) For selecting C > D with an attempt at a relevant justification. For one of the following: a statement that correctly relates the total energy of the system, the maximum compression distance of the springs, and the spring constant.Walkthrough of the 2023 AP Physics 1 FRQ #1Website: http://www.bothellstemcoach.comPDF Solutions: https://www.bothellstemcoach.com/post/2023-ap-free-response...1 point. Example Response. There are no external forces on the system and no energy is dissipated by friction, so the total mechanical energy stays the same. Total for part (b) 1 point. ©2022 College Board AP® Physics 1: Algebra-Based 2022 Scoring Guidelines. (c) For a final bar chart where both.7KHVWULQJ VWUHWFKHG LVPXQGHU RIPJ D IRUFH 1 %HFDXVH ) N[ ZH KDYH PJ N 1 P 1 P [ 7RWDOIRUSDUW D SRLQWV E L )RUDYDOLG UHDVRQ NLQHWLF ZK\HQHUJ\LVWKH WKHVDPH DW ERWK WLPHV SRLQW ... AP Physics 1: Algebra-Based Author: College Board; Advanced Placement Subject: AP; Advanced Placement …Colleges agree that Units 8-10 can be removed from AP Physics 1 since they are covered in AP Physics 2; accordingly, Units 8-10 are no longer tested in AP Physics 1. As of 2021, AP Physics 1 Exams focus exclusively on content covered in Units 1-7. Learn about the foundational principles of physics as you explore Newtonian mechanics; work ... 2. , as shown in the graph. AP. Physics C: Electricity and Magnetism 2023 Free-Response Questions. Continue your response to QUESTION 1 on this page. i. Draw the best-fit line for the data. ii. Using the best-fit line, calculate an experimental value for the vacuum permittivity. e. Practice. Free Response. Assessments. Overview. Experimental Design. This question type assesses student ability to design and describe a scientific investigation, analyze authentic laboratory data, and identify patterns or explain phenomena. FRQ. 7 questions. Spring Roller Coaster Energy. EK 4.C.1, EU 4.C, LO 4.C.1.1, 3 more...The third point was earned for a response that correctly relates the slope of the line to the rotational inertia and calculates a value of the rotational inertia with correct units. 2022 College Board. Visit College Board on the web: collegeboard.org. AP® Physics 1: Algebra-Based 2022 Scoring Commentary.General Notes About 2017 AP Physics Scoring Guidelines. The solutions contain the most common method of solving the free-response questions and the allocation of points for this solution. Some also contain a common alternate solution. Other methods of solution also receive appropriate credit for correct work.What do the AP Physics 1 exam free response questions look like? ... (and parents alike) might be interested in knowing the average AP Physics 1 score. In 2023, of the 144,526 students who took the AP Physics 1 exam, 43.2% of students scored a 3 or higher. Only 24.9% scored a 4 or 5. ... Many free response questions are divided into … Directions: Questions 1, 4, and 5 are short free-response questions that require about 13 minutes each to answer and are worth 7 points each. Questions 2 and 3 are long free-response questions that require about 25 minutes each to answer and are worth 12 points each. Show your work for each part in the space provided after that part. We can refer to the AP® Student Score Distributions released every year by the College Board. The current version of AP® Physics 1 has only been offered since the 2014-2015 school year. These reports show us that the mean score in 2015 was 2.32, in 2016 was 2.33, in 2017 was 2.40, in 2018 was 2.36, in 2019 was 2.51, and 2.65 in 2020.May 19, 2023 ... 2023 AP Chem FRQ No. 1 Here is how I would go about answering the first free response questions of the 2023 AP Chem exam.All victims of domestic violence can be physically and emotionally injured. However, because of general streng All victims of domestic violence can be physically and emotionally in...2022 AP Score Distributions. See how students performed on each AP Exam for the exams administered in 2022. PDF. 4.42 KB. 2023 AP score distribution tables show the percentages of 1s, 2s, 3s, 4s, and 5s for each AP subject for all AP students. 10–16%. 2–9%. Download our free 2023 AP Physics 1 Study Tracker Notion Template. It's free for all students to use. Track your study progress, rate your confidence levels, and store notes in each study guide page. It's the perfect companion to Fiveable's AP Study Guides! Figure 1. Each blade has a length and mass , with a center of mass located at a distance L from the axis of. M. 3. rotation, as shown in Figure 2. (a) Derive an expression for the rotational inertia of the three-blade system. Express your answer in terms of , M. , and physical constants, as appropriate. ⏱ Remember, the AP Physics 1 exam has 5 free-response questions, and you will be given 90 minutes to complete the FRQ section. (This means you should give yourself ~18 minutes to go through each practice FRQ.) Setup. A group of students must determine the spring constant k of a spring that hangs vertically from a ring stand. The …There's a reason why some passes miss their target, and others land right in the receiver's hands -- it's physics! Take a look at the game from a whole new angle. Advertisement ­Wh... If you are using assistive technology and need help accessing these PDFs in another format, contact Services for Students with Disabilities at 212-713-8333 or by email at [email protected]. The 2020 free-response questions are available in the AP Classroom question bank. Download free-response questions from past AP Physics C ... A physical altercation is defined as being an argument, dispute or altercation that involves force or physical aggression. Physical altercations differ from verbal altercations bec... Section I: Multiple Choice. 50 Questions | 1 Hour 30 Minutes | 50% of Exam Score. Questions are either discrete questions or question sets, in which students are provided with a stimulus or a set of data and a series of related questions. The section includes 5 individual multi-select questions (2 options are correct). Time is always tight on AP exams, including AP Physics 1. For the free response section, you'll get 90 minutes to answer five questions. It can be easy to get caught up trying to answer one question and suddenly realize you're nearly out of time but haven't had a chance to look at some of the other questions.PHYSICS 1 SECTION II Time—1 hour and 30 minutes 5 Questions Directions: Questions 1, 4, and 5 are short free-response questions that require about 13 minutes each to answer and are worth 7 points each. Questions 2 and 3 are long free-response questions that require about 25 minutes each to answer and are worth 12 points each.Walkthrough of the 2023 AP Physics 1 FRQ #3Website: http://www.bothellstemcoach.comPDF Solutions: https://www.bothellstemcoach.com/post/2023-ap-free-response...General Notes About 2019 AP Physics Scoring Guidelines . 1. The solutions contain the most common method of solving the free-response questions and the allocation of points for this solution. Some also contain a common alternate solution. Other methods of solution also receive appropriate credit for correct work. 2.Download free-response questions from past exams along with scoring guidelines, sample responses from exam takers, and scoring distributions. If you are using assistive technology and need help accessing these PDFs in another format, contact Services for Students with Disabilities at 212-713-8333 or by email at [email protected] Unit 3 - WEP and Momentum FRQ. AP Physics 1 Page 5 of 32. 5. A small block of mass M is released from rest at the top of the curved frictionless ramp shown above. The block slides down the ramp and is moving with a speed 3 0 when it collides with a larger block of mass 1 at rest at the bottom of the incline.Each force must be represented by a distinct arrow starting on, and pointing away from, the point of application on the sphere. (d) Derive an expression for each of the following as the sphere is rotating and sliding between points and in. A B. terms of v0 , m, R, t, and physical constants as appropriate.Most of these questions look intimidating, but they're manageable if you take them one step at a time and break them down into smaller chunks. Here's a review of how to solve free-response questions: Step 1: Figure out what you know. Write down any data that's included in the question. Step 2: Dive into the question. AP® Physics C: Mechanics Scoring Statistics 2023 Free-Response Questions Set 2. Question. Mean. Standard Deviation. Number of Possible Points. 8.72. 4.07. 15. Nov 17, 2021 · AP Physics 1 Free Response Question Answers for Dynamics. 👋 Welcome to the AP Physics Unit 2 FRQ (Dynamics) Answers . Have your responses handy as you go through the rubrics to see how you did! ⏱ Remember, the AP Physics 1 exam has 5 free-response questions, and you will be given 90 minutes to complete the FRQ section. Walkthrough of the 2023 AP Physics C Mechanics (Set 2)Website: http://www.bothellstemcoach.comPDF Solutions: https://www.bothellstemcoach.com/post/2023-ap-fr...May 14, 2023 ... Comments2 · 2023 AP Physics 2 Free Response #4 · 2022 AP Physics 2 Free Response #1 · 2023 AP Physics C Mechanics (Set 1) · 2023 AP Phy...Here's my own PDF solutions for the released 2023 AP exams for AP Calculus, Statistics, and Physics. If you're looking for help in AP Physics 1, check out a …People with depression often have worse physical health, as well as worse self-perceived health, than those wi People with depression often have worse physical health, as well as w...⏱ Remember, the AP Physics 1 exam has 5 free-response questions, and you will be given 90 minutes to complete the FRQ section. (This means you should give yourself ~18 minutes to go through each practice FRQ.) Setup. A worker pushes a wooden crate up a ramp at a constant velocity. The ramp has been covered with a material that …If you are using assistive technology and need help accessing these PDFs in another format, contact Services for Students with Disabilities at 212-713-8333 or by email at [email protected]. The 2020 free-response questions are available in the AP Classroom question bank. Download free-response questions from past AP Physics C ...1 point. 2023 College Board AP® Physics 1: Algebra-Based 2023 Scoring Guidelines. (b) For indicating that the torque, τ , is the same for both pulleys. For indicating that the impulse, τ∆ t , (or change in momentum ∆ L ) is the same for both pulleys because τ and ∆ t are the same. For indicating that the rotational inertia, I , of the ...Reply reply. anormalhumanasyousee. •. AP Physics 1, Form I, the first FRQ about pendulum and spring. There are two parts that I'm not so sure about the answers: one about comparing the time the sphere it reaches the lowest point before and after the attachment of the spring and one about comparing the angle it makes with the equilibrium ...In a recent survey from HiBob, employees revealed that despite some comforts of working from home, they're eager to return to the physical workplace. If you think all of your emplo...ETF strategy - ABRDN PHYSICAL SILVER SHARES ETF - Current price data, news, charts and performance Indices Commodities Currencies StocksSound waves carry music to our ears, but they also carry the principles of physics. Find out how physics and music are intertwined. Advertisement Music doesn't emerge from random c...cos. tan. Directions: Questions 1, 4 and 5 are short free-response questions that require about 13 minutes each to answer and are worth 7 points each. Questions 2 and 3 are long free-response questions that require about 25 minutes each to answer and are worth 12 points each. Show your work for each part in the space provided after that part.What do the AP Physics 1 exam free response questions look like? ... (and parents alike) might be interested in knowing the average AP Physics 1 score. In 2023, of the 144,526 students who took the AP Physics 1 exam, 43.2% of students scored a 3 or higher. Only 24.9% scored a 4 or 5. ... Many free response questions are divided into …AP Physics 1 Score Calculator. To estimate your potential score on the AP® Physics 1 exam, adjust the sliders below to reflect your performance on the multiple-choice section and the five free-response questions. The score calculator’s curve is based on the most recently available scoring guidelines. Section I: Part A - Multiple Choice. 25 /50.Download free-response questions from past exams along with scoring guidelines, sample responses from exam takers, and scoring distributions. If you are using assistive technology and need help accessing these PDFs in another format, contact Services for Students with Disabilities at 212-713-8333 or by email at [email protected]. The ... Attached below are all of the released official 2023 AP FRQ prompts for each AP Exam! Please note that for some AP exams, only one set of FRQs were released. If your set isn't shown below, that means yours wasn't one of the main forms and/or you did late testing. Monday, May 1, 2023. Solutions to problems 1, 4, and 5 from the publicly released FRQs for the AP Physics 1 exam in 2023: https://apcentral.collegeboard.org/media/pdf/ap23-frq-ph...Oct 26, 2020 ... My solutions to Free Response Question #5 from the 2017 AP Physics 1 Exam. This is a mechanical waves question which requires you to ...1 point is earned for indicating the forces on block 3 would be unbalanced (net force to the right from the string). 1 point is earned for making a claim that indicates that since the forces are unbalanced, block 3 would accelerate to the right. Example response: There is a net force on block 3 which is equal to the tension in the spring.Answer all three questions. The suggested time is about 15 minutes for answering each of the questions, which are worth 15 points each. The parts within a question may not have equal weight. Show all your work in this booklet in the spaces provided after each part. 1.Walkthrough of the 2023 AP Physics 1 FRQ #3Website: http://www.bothellstemcoach.comPDF Solutions: https://www.bothellstemcoach.com/post/2023-ap-free-response...5 Questions. Directions: Questions 1, 4, and 5 are short free-response questions that require about 13 minutes each to answer and are worth 7 points each. Questions 2 and 3 are …In this video, we’ll unpack a sample free-response question—FRQ (Question 3: Paragraph Argument Short Answer).Download questions here: https://tinyurl.com/yc...It's no secret that untreated anxiety disorders can take a major toll on your emotional well-being. But because anxiety triggers a cascade of physical symptoms, it can also have an...Colleges agree that Units 8-10 can be removed from AP Physics 1 since they are covered in AP Physics 2; accordingly, Units 8-10 are no longer tested in AP Physics 1. As of 2021, AP Physics 1 Exams focus exclusively on content covered in Units 1-7. Learn about the foundational principles of physics as you explore Newtonian mechanics; work ...Shah's Physics Videos. 102 subscribers. Subscribed. 3. 820 views 10 months ago. My solutions to the publicly released QQT and Experimental Design questions for AP Physics 1's 2023 exam:...Walkthrough of the 2023 AP Physics 2 FRQ #1Website: http://www.bothellstemcoach.comPDF Solutions: https://www.bothellstemcoach.com/post/2023-ap-free-response...Once upon a time, if you wanted to learn about a topic like physics, you had to either take a course or read a book and attempt to navigate it yourself. A subject like physics coul...General Notes About 2017 AP Physics Scoring Guidelines. The solutions contain the most common method of solving the free-response questions and the allocation of points for this solution. Some also contain a common alternate solution. Other methods of solution also receive appropriate credit for correct work. The other point was not earned because the response does not show an x versus t curve that is concave up and has an initially negative slope. Visit College Board on the web: collegeboard.org. AP® Physics 1: Algebra-Based 2023 Scoring Commentary. Question 2 (continued) Sample: 2B. Write your responses to this question only on the designated pages in the separate Free Response booklet. Write your solution to each part in the space provided for that part. 2023 College Board. 5. The graphs of the functions f and g are shown in the figure for 12. 0 £ x £ 3. It is known that g(x) =. 3 + x. for x .Walkthrough of the 2023 AP Physics 1 FRQ #2Website: http://www.bothellstemcoach.comPDF Solutions: https://www.bothellstemcoach.com/post/2023-ap-free-response...Walkthrough of the 2023 AP Physics 1 FRQ #1Website: http://www.bothellstemcoach.comPDF Solutions: https://www.bothellstemcoach.com/post/2023-ap-free-response...Directions: Questions 1, 4, and 5 are short free-response questions that require about 13 minutes each to answer and are worth 7 points each. Questions 2 and 3 are long free-response questions that require about 25 minutes each to answer and are worth 12 points each. Show your work for each part in the space provided after that part.If you are using assistive technology and need help accessing these PDFs in another format, contact Services for Students with Disabilities at 212-713-8333 or by email at [email protected]. The 2020 free-response questions are available in the AP Classroom question bank. Download free-response questions from past AP Physics C ...Download free-response questions from past exams along with scoring guidelines, sample responses from exam takers, and scoring distributions. If you are using assistive technology and need help accessing these PDFs in another format, contact Services for Students with Disabilities at 212-713-8333 or by email at [email protected]. Note ...We can refer to the AP® Student Score Distributions released every year by the College Board. The current version of AP® Physics 1 has only been offered since the 2014-2015 school year. These reports show us that the mean score in 2015 was 2.32, in 2016 was 2.33, in 2017 was 2.40, in 2018 was 2.36, in 2019 was 2.51, and 2.65 in 2020.Physical activity -- which includes an active lifestyle and routine exercise -- plus eating well, is the best way to stay healthy. Physical activity -- which includes an active lif...AP Physics 1 Exam - 2023 US Discussion. 2 2? 2. 266 votes, 1.7K comments. 314K subscribers in the APStudents community. No matter what course you are taking, we are a community that helps students….

AP Physics 1 Exam - 2023 US Discussion. 2 2? 2. 266 votes, 1.7K comments. 314K subscribers in the APStudents community. No matter what course you are taking, we are a community that helps students….. United 2683

2023 physics 1 frq

All victims of domestic violence can be physically and emotionally injured. However, because of general streng All victims of domestic violence can be physically and emotionally in...AP® Physics 1 Scoring Statistics 2023 Free-Response Questions. Question. Mean. Standard Deviation. Number of Possible Points. 2.90. 1.95.AP® Physics 1 Scoring Statistics 2023 Free-Response Questions. Question. Mean. Standard Deviation. Number of Possible Points. 2.90. 1.95.3 Questions | 45 Minutes | 50% of Exam Score. One of the 3 free-response questions will include an experimental or lab-based component. Questions will assess all 7 of the science practices: visual representations, question and method, representing data and phenomena, data analysis, theoretical relationships, mathematical routines, and ...2022-2023 Unit 3 - WEP and Momentum FRQ. AP Physics 1 Page 5 of 32. 5. A small block of mass M is released from rest at the top of the curved frictionless ramp shown above. The block slides down the ramp and is moving with a speed 3 0 when it collides with a larger block of mass 1 at rest at the bottom of the incline.Section I: Multiple Choice. 50% of score | 1 hour and 30 minutes to complete. Section 1A: Single-select. 45 questions where you choose a single best answer. Section 1B: Multiple-select. 5 questions where you choose all correct answers. Section II: Free-Response Questions. 50% of score | 1 hour and 30 minutes to complete.Oct 26, 2020 ... My solutions to Free Response Question #5 from the 2017 AP Physics 1 Exam. This is a mechanical waves question which requires you to ...With careful financial management, budgeting, and a supportive network, a physically disabled woman became financially empowered. In an earlier story on CentSai, Katie shared how s... 5 Questions. Directions: Questions 1, 4, and 5 are short free-response questions that require about 13 minutes each to answer and are worth 7 points each. Questions 2 and 3 are long free-response questions that require about 25 minutes each to answer and are worth 12 points each. Show your work for each part in the space provided after that part. In this video, we’ll unpack a sample free-response question—FRQ (Question 4/5: Short Answer).Download questions here: https://tinyurl.com/bv766swuStay motiva...Total for part (d) Total for question 1. AP® Physics C: Mechanics 2023 Scoring Guidelines. (d) For selecting C > D with an attempt at a relevant justification. For one of the following: a statement that correctly relates the total energy of the system, the maximum compression distance of the springs, and the spring constant.Begin your response to this question at the top of a new page in the separate Free Response booklet and fill in the appropriate circle at the top of each page to indicate the question number. 3. The graph provided shows the demand (d), marginal revenue (MR), average total cost (ATC), average variable cost (AVC), and marginal cost (MC) curves ...Original free-response prompts for AP® Physics 1 that mimic the questions found on the real exam. Our expert authors also provide an exemplary response for each AP free …As you can see from this chart, the passing rate for the AP® Physics 1 exam ranges from about 40% to 50%, which is well below the overall AP® exam average. This exam tends to attract both future and …Jan 18, 2014 ... AP Physics 1 FRQ. Allen Tsao The STEM Coach · Playlist · 0:51. Go to ... 2023 AP Physics 1 Free Response #3. Allen Tsao The STEM Coach•9.7K ...Walkthrough of the 2023 AP Physics C Electricity and Magnetism (Set 1) FRQ #1Website: http://www.bothellstemcoach.comPDF Solutions: https://www.bothellstemco...Directions: Questions 1, 4, and 5 are short free-response questions that require about 13 minutes each to answer and are worth 7 points each. Questions 2 and 3 are long free ….

Popular Topics