Contest Definition and 490 Threads

Hello, I am looking for contest math books, problem sets, videos, etc. I'm quite good at algebra, but I'm not so good at geometry, counting, probability and number theory. I know a few resources such as aops, AMC, AIME, local competitions and a few books. It would be great if you could suggest...

Hi all. This is the first time I am using this forum, so please forgive me if this has been said before already. I am a high-school sophomore and I took the AP Physics 1 course last year. I really enjoyed it because I had an amazing teacher and next year I will be taking AP Physics 2 and AP...

Hi! I'm a roboticist / university lecturer, and I'm running a design contest together with several other universities that I thought might be a great place for all the scientists in this forum! It's called the Natural Robotics Contest: www.naturalroboticscontest.com All you need is drawing...

There's a famous functional equation that was asked in the 2019 IMO. It looks like this: find all f: Z -> Z where f(2a)+2f(b)=f(f(a+b)). I thought of solving it using a recurrence relation where a_n=f(nx). But when I substituted values in the functional equation (after setting a and b equal...

https://www.atlasobscura.com/articles/what-is-a-hair-freezing-contest I do not know where to post this, exactly. Photos are interesting...

{Administrative Note: This was the last PF Photo Contest that I administered. It has been a great run since I started this contest more than 10 years ago on this forum. Thank you to everyone who had participated in it. It was fun (most of the time). Special thanks to long-time participants...

I have a notion that students involved in contest math/physics since high school 'develop' a better ability to pick up concepts (not in the context of contest math/physics) quicker and solve relatively more 'complex' problems. In high school I heard about contest math but never really immersed...

What textbook should I go through to be prepared for the F=MA contest and advance to USAPhO? Is Khan Academy AP Physics Enough? I have started HRK Physics but it seems to me to be quite boring, and out of ~50 practice problems at the end of each chapter I would say ~4-5 of them are interesting...

The Instructables website is having an Optics Contest (going for 43 days from now). You could win an iPhone X! These are DIY projects that you write up with pictures so that other people can replicate them. Instructions --> Instructables. There are already several entries you can view there...

Biotechniques magazine does a song parody contest each year. https://www.future-science.com/btn/labgrammy it is for this year. Not all songs are created equal. IMHO the best three are: NeuroTransmissions: "Get Data"; fun in the lab stuff A Capella Science: "Evo-Devo"; about Evo-Devo...

It's time to freshen up the PF Lounge title! We need your help! Suggest a clever and fun name to replace the "PF Lounge" category name. Vote by using the "Like" link. PF has final say. example: "Event Horizon Cantina" or "The Star Dust Watering Hole"

Undergrad physics students, are you taking the physics GRE in April or next fall? We have a contest for you! Big thanks to Cambridge University Press for donating a copy of the newly published 3rd edition of Conquering the Physics GRE! How to win: Post your favorite physics problem you've run...

In connection to the publication of my new textbook Mathematical Methods for Physics and Engineering, CRC Press has graciously offered Physics Forums three free copies of it to use as prizes in various competitions. This is the third and last of the contests, the previous two being the photo...

In connection to the publication of @Orodruin's new textbook Mathematical Methods for Physics and Engineering, CRC Press has graciously offered Physics Forums three free copies of it to use as prizes in various competitions of which this will be the second. Note! The book is aimed towards...

Mod note: Moved from Science and Math Textbooks section, so is missing the homework template I am doing an egg drop challange and we aren’t allowed to have a parachute. I asked and I put my egg in a cup hot glued to the inside of an upside down styrofoam bowl. How do I keep it from flipping? We...

The goal is to create the most beautiful or interesting equation aesthetically (pleasing to the eye). This is not about it's mathematical significance. Get your inner designer on! Each member is allowed to post one equation The equation can be completely made up Must use LaTeX Be creative...

IO9 article on the ESP Into the Black Writing contest: http://io9.gizmodo.com/write-a-short-story-about-the-economics-of-the-future-a-1800020162 Due date in November 1st 2017 with a prize of $12000 for 5000 word or less short story about economic security in the future. Jedi

Homework Statement 1) Are F and F' as shown in figure, the action-reaction forces between the two boxes? 2) What is the action and reaction force between the two boxes? Homework EquationsThe Attempt at a Solution I think F = 28N and F' = - 28 N Simply adding the action- reaction forces for...

I have read that IK Pegasi B is the white dwarf most likely to supernova in our galactic neighborhood. Are any other white dwarfs under consideration? My vote goes to AN Ursae Majoris B. (a polar white dwarf about 124 light years away, I think) Has this star ever been considered by anyone...

Can you write a funny caption for this photo?

The question is : If x > 0 and I divide x by y, the quotient is 3 and remainder is 7. If I divide y by x the remainder is 12. what is the value of x? So far I used long division quotient form to make 2 equations... 1. x/y = 3 + 7/y 2. y/x = Q(quotient) + 12/x so 1st equation i solve for y and...

Have an impressive book shelf set up or rare books? Time to show it off! Take a photo of your book shelf or collection of books and see what happens. Rules: Must be your actual book shelf and books One photo per member. Photo with the most LIKES is the winner Contest end is 7/15/16 Winner must...

Time to get your physics poetry on! Rules: Must meet standard Haiku format. One Haiku per member. Haiku with the most LIKES is the winner Contest end is 7/15/16 Winner must be in US to receive book otherwise will be given $10 Amazon gift card. Prize:

klotza submitted a new PF Insights post Roger Babson's Anti-Gravity Contest Continue reading the Original PF Insights Post.

This is just for fun. No prizes. I just want to see what people come up with. The rules are this: - You need to write in your post a real number (reminder: real numbers are finite by definition). - The person who writes the largest real number wins - Your usable characters are limited to 200...

The goal is to create the most beautiful or interesting equation aesthetically (pleasing to the eye). This is not about it's significance. Each member is allowed to post one equation. The equation can be completely new and made up (doesn't have to be famous). Be creative! The equation must be...

I've been debating against myself whether to use my Chaos Project Design to enter the contest but I don't have enough time to complete it at the moment and could leave some clueless as this is a High School level Math Fair. Does anyone know any other Ideas for me? I'm rather out of ideas and...

http://plancks.info/contest/sample-exercises http://leiden.plancks.info/ Countries currently participating, it seems like a great opportunity and I'm sure some top universities from the states could fund students to go.(who would love to go also) They didn't participate last year either...

The day after the contest ended, we had nice weather... here's a few that were a day late and a dollar short:

A lot of photos submitted to the contest this week, even though some of them are a bit vague in how they connect to the topic. Still, I'll give them the benefit of a doubt this time around (it will become more strict after this). As always, please vote for the photo that best reflects our...

It's Good To Be Back! The more things change, the more things stay the same! With the new PF look and new engine, it looks like the Mentors are also bringing back the same old thing - ME! I'm partially coming out of my retirement to continue running the PF Photo Contest in the next foreseeable...

I was given this question from the Pascal Math contest 2001: __________________________________________ Cindy leaves school at the same time every day. If she cycles at 20 km/h, she arrives home at 4:30 in the afternoon. If she cycles at 10 km/h, she arrives home at 5:15 in the afternoon. At...

Homework Statement Suppose someone says to you that the following statement is true: “If Jack is younger than his father, then Jack will not lose the contest.” Did Jack win the contest? Why or why not? Explain. Homework Equations Truth table from textbook: A--------B--------A implies B...

Guys, waterloo contest is coming in next week, do you guys prepare for it?

Hi everyone this is my first time posting on this forum and I didn't know where to put this so hopefully this doesn't get marked as spam. I am actually a Graphic Designer studying at Boston University, and I am working on an Aerospace Design Contest website for engineers in the Aerospace...

Hi guys , this topic is specialized to post some puzzles and challenge members to solve them. I will post the first puzzle and anyone solves it should try to post another one . If he/she didn't have any, in half a day anyone is allowed to post another challenging problem The scope of...

We are having a math contest on calculus at our university, hope me the best luck :D

I'm posting this here even though it is related to photography, just to make sure it gets enough eyes. Don't miss casting your votes for your favorite Global Particle Physics PhotoWalk contest. http://www.interactions.org/cms/?pid=6000 You get to select and vote for 3 of them. And...

Homework Statement The problem and solution are attached, but I don't think the solution is correct. Homework Equations The Attempt at a Solution The only thing I don't understand is why Joe needs to supply the force to move both people. It seems to me that gravity is providing...

Homework Statement Superman is regaining his strength by pulling with a force F on a large block of mass M resting on a frictionless floor as shown. A small block of mass m rests on the upper surface of the large block, and there is friction at that surface, with static coefficient μ. Lois...

Homework Statement Audrey McLaughlin has a vehicle with a built-in rectangular swimming pool. The pool is 2.4m long, 1.4m wide, and is partly filled with water to a constant depth of 1.2m as shown. Calculate the minimum additional height, h, to avoid water spillage when the vehicle maintains...

Homework Statement 24. Three point masses m are attached together by identical springs. When placed at rest on a horizontal surface the masses form a triangle with side length l. When the assembly is rotated about its center at angular velocity ω, the masses form a triangle with side...

Homework Statement The problem and solution involving the ballistic missile question is in the attached picture. Homework Equations The Attempt at a Solution Why does the first expression have (24)(6) in the denominator, when the second expression has (24)(6)(2) ? My thought...

Homework Statement Both the question and solution are on this link (Question 7): http://sin.uwaterloo.ca/solutions_2012.pdf I understand the solution they provided, but I think the question is misleading and should not have been worded that way. I just want to clarify if I'm right or not...

"Quantum measurement predictions are consistent with relativity for macroscopic observations, but there is no consensus on how to explain this consistency in fundamental terms. The prevailing assumption is that the relativistic structure of spacetime should provide the framework for any...

http://www.gravityresearchfoundation.org/pdf/abstracts/2012abstracts.pdf Ted Jacobson got honorable mention with this one http://arxiv.org/abs/1204.6349 Gravitation and vacuum entanglement entropy Ted Jacobson (Submitted on 28 Apr 2012) The vacuum of quantum fields contains correlated...

The following questions aren't for homework, just contest preparation. Thanks for your help! 1. A ball of mass m attached to an inextensible string of length R in swung around a vertical circle just fast enough so that the string is always fully stretched. Let ΔT denote the difference between...

Homework Statement A hollow cylinder with a very thin wall (like a toilet paper tube) and a block are placed at rest at the top of a plane with inclination  above the horizontal. The cylinder rolls down the plane without slipping and the block slides down the plane; it is found that both...

Homework Statement The Attempt at a Solution My first attempt was that since one of the twins runs east at top speed (with both masses) then the cart moves west and then he jumps off. Then after the second twin runs with the same speed west, the cart (with only one mass this time and...