What is Challenge: Definition and 942 Discussions

The Challenge (originally known as Road Rules: All Stars, followed by Real World/Road Rules Challenge and occasionally known as The Real World/Road Rules Challenge during this time), is a reality competition show on MTV that is spun off from two of the network's reality shows, The Real World and Road Rules. Originally featuring alumni from these two shows, casting for The Challenge has slowly expanded to include contestants who debuted on The Challenge itself, alumni from other MTV franchises including Are You the One?, Ex on the Beach (Brazil, UK and US), Geordie Shore and from other non-MTV shows. The contestants compete against one another in various extreme challenges to avoid elimination. The winners of the final challenge win the competition and share a large cash prize. The Challenge is currently hosted by T. J. Lavin.
The series premiered on June 1, 1998. The show was originally titled Road Rules: All Stars (in which notable Real World alumni participated in a Road Rules style road-trip). It was renamed Real World/Road Rules Challenge for the 2nd season, then later abridged to simply The Challenge by the show's 19th season.
Since the fourth season, each season has supplied the show with a unique subtitle, such as Rivals. Each season consists of a format and theme whereby the subtitle is derived. The show's most recent season, Double Agents, premiered on December 9, 2020. A new special limited-series, titled The Challenge: All Stars premiered on April 1, 2021 on the Paramount+ streaming service.

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  1. W

    MHB Calculating Powers of 4: A Challenge!

    Working with a problem with huge integers; is 4^27 + 4^500 + 4^972 a square? (length of that is 586 digits!) Manageable(!) example: 4^3 + 4^7 + 4^10 = 1032^2 Thanks for any help; couldn't find an online calculator that can handle that.
  2. DaveC426913

    Soot Mystery: Uncovering the Puzzling Phenomenon in a Wood-Burning Stove Room

    OK fizziks guys, here's a puzzle. Took this pic at a friend's house today. They have a wood-burning stove in the room. The ceiling and wall are blackened with soot where ever there is a stud. I can't think of any explanation. Some deets: - the room is a closed-in porch, probably uninsulated or...
  3. A

    Calculating Density: A Challenge for Aviation Maintenance Students

    My teacher gave us a problem to find the density of an object that weighs 40 lbs. and has a volume of 120 cubic inches. I think the answer is .33 lbs. per cubic inch, my teacher said it is 3.3 and some of my classmates said it was something way different. In my teachers defense he is a...
  4. G

    Challenge: Investigating Ac Signals Coupled to DC Network

    I have been going through the ac signals coupled by a capacitor to a dc network.. Using superposition principle.. for solution it was shown that both bulk resistance and dynamic resistances for the diodes used are required... Why is this happening.. Since to what i know bulk resistance is...
  5. G

    A classical challenge to Bell's Theorem?

    This post moved from "Nick Herbert's proof?" https://www.physicsforums.com/showthread.php?t=589134 at the request of the OP. .. Effects without a cause in Herbert's experiment? I presume that you believe that some quantum events have no cause; not classical effects? So I would...
  6. Y

    Demonstrating Boundedness of Series cos(n): A Challenge

    Homework Statement I need to show that series cos(n) for n=0,1,...,inf is bounded. Homework Equations The Attempt at a Solution I understand that each of the terms of the sequence is bounded by 1. However, I cannot show the bound for the entire sequence? Could someone give some hints?
  7. D

    Confirming Answers for Oscillating Mass on a Spring

    So, I am supposed to answer this question for my class and I found some answers already. I would like someone to confirm them for me or if not, guide me into getting the right ones. This is physics introduction. The question: Suppose that a 0.20kg is oscillating at the end of spring upon a...
  8. L

    Ponderings on Reflected Sunlight in a Race Track

    While I was strolling across a race track the other day under intense sunlight, I found myself pondering over an interesting little problem and I would like to hear opinion about it. Cutting to the chase: would I be hit by more reflected sunlight if I walked on the yellow, more reflective...
  9. C

    Does Galileo's Challenge Hold Up with Modern Physics Insights?

    Hi, new here just got registered to this forum since i have a physics question and Google had this forum in its first preferences. :) Well i got from my library an interesting book called: "Mad about Physics: Braintwisters, Paradoxes, and Curiosities", a very good book with all sort of...
  10. chisigma

    MHB A 'not too challenge' question....

    The challenging aspect to the question is the unexspected semplicity of the final result... Find the sum of the series... $\displaystyle \sum_{n=2}^{\infty} \{1-\zeta(n)\}$ (1) ... where... $\displaystyle \zeta(s)= \sum_{k=1}^{\infty} \frac{1}{k^{s}}$ (2) ... is the Riemann Zeta...
  11. S

    Solve the Fiendish Physics Final Exam Challenge

    Homework Statement A fiendish physics instructor devises the following exercise for students as a pass/fail final exam for their heat course. A 110 g cube of ice (5 cm on a side) is placed in a form fitting Styrofoam box that is 2 mm thick. The ice cube and the inside of the box are at a...
  12. H

    The simple yet best challenge i ve ever seen

    the simple yet best challenge i ve ever seen ! Fine let's keep it simple Assume a mass of 'm' moving at velocity 'v'. now if I somehow increase the mass of it to '2m' (by some means as a mass sticking on to it newly ... or any other means of no loss of energy ... now don't tell me its...
  13. H

    A real challenge: real gas isothermal delta h

    Homework Statement Using any software, create the enthalpy table for the following two cases of superheated steam: 1. Isobaric process at a chosen pressure in 100 spaces of 5 degrees celcius. 2. Isothermal process at a chosen temperature, given Vg from the book, in 1000 spaces of 0.1 bar...
  14. G

    Dinner Club Scheduling Challenge

    It's been 40 years since engineering school, so I could use some help. We have a subdivision dinner club. Each year, a leader sets up the schedule. Knowns: Number of couples, usually around 16 Number of dinners attended each season, 4 Number of couples per home, usually 4 including the...
  15. C

    Challenge question to the community - - Determine the inverse function of

    f(x) \ = \ \dfrac{1 - \sqrt{x}}{1 + \sqrt{x}}Edit: \ \ I \ sent \ a \ PM \ to \ a \ mentor.
  16. alexmahone

    MHB Bob's 9 Minute Hourglass Challenge

    Bob owns a couple of hourglasses -- one is a 4 minute hourglass and the other is a 7 minute hourglass. If Bob wants to measure 9 minutes, how could he do it?
  17. C

    AP Calculus AB: Solving Limits Question on Continuity

    I tutor an AP Calculus AB class at the library every week, and I recently gave the students a test on Limits and Continuity. The test was fairly straightforward, but some of the free-response questions were somewhat difficult. The students seemed to get the answers fine, but my friend/mentor...
  18. Pythagorean

    A challenge to the fossil record

    Following is a non-peer reviewed journalism. Is there merit to this? http://www.voanews.com/english/news/science-technology/600-Million-Year-Old-Microscopic-Fossils-Upend-Evolution-Theory-136172283.html
  19. C

    Challenge to the community, Squaring of polynomials conjecture

    Given polynomials of degree n > 2, such that they have the form of p(x) \ = \ x^n \ + \ a_1x^{n - 1} \ + \ a_2x^{n - 2} \ + \ a_3x^{n - 3} \ + \ ... \ + \ a_{n - 2}x^2 \ + \ a_{n - 1}x \ + \ a_n. And \ \ all \ \ of \ \ the \ \ a_i \ \ are \ nonzero \ integers \ (which...
  20. C

    Challenge problem to the community - - - domain and range

    What are the domain and range of the following: (Note: It is a relation that is not a function.) y^2(x^2 - 1) = x^4
  21. D

    Design a $40 Egg-Protecting Device for the Egg Drop Challenge

    Homework Statement The egg protecting device cannot slow down the natural descent of the egg in any form: The mechanism used to protect the egg cannot rely on buoyancy (i.e. no inflated balloon-based solutions) or air resistance (i.e. no parachutes or solutions designed to increase the air...
  22. C

    Chemistry Understanding Moles: A Homework Challenge

    Homework Statement i have just learned that one mole is actually what i had learned as one molecule. now one atom is also known as one mole.eg. one mole of methane has 5 moles of atoms( this sentence is written by my teacher and no matter how i try to look at it from different perspectives...
  23. T

    Acceleration of Forces Challenge Problem

    So I was given a challenge problem in physics class that reads... Mass m1=40kg, is sitting on a frictionless floor while m2=10kg sits on top of it. Between each mass, the coefficient of static friction is .6, and the kinetic coefficient is .4. M2 is pulled by a force of 100N to the left. What...
  24. J

    Differential Equation Challenge

    Solve showing full working (x^2 -1)y' + 2xy = x You must show full working.
  25. J

    Integrating a Complex Function: A Challenge

    Homework Statement Integrate the following: (sin(x)/x)^4 between negative infinity and infinity. Homework Equations The residue theorem, contour integral techniques. The answer should be 2pi/3 The Attempt at a Solution I'm not even sure where to start honestly. I define a function...
  26. D

    Calculating the Energy Needed to Heat Magnesium: A Challenge!

    Any help on this quistion would be greatly appreciated. I have no idea ho to answere it, and can't find anything in my nothes or books anywhere. The temperature-dependent molar specific heat capacity at constant pressure of many substances is given by: c =a+2bT−cT^−2 For magnesium, the...
  27. F

    Engineering Challenge- Device needed to handle massive energy

    I've been working on a multi-latteral project lately with afew of my collegues where our end goal is, free, wireless energy. The process is nearly complete and we hope to be able to broadcast this energy on a global scale, most of our technical issues have been worked out over the years but one...
  28. V

    Solving Question 2: Pulley System Challenge

    Homework Statement The question is on the attached picture, it's question number 2! Homework Equations Dealing with pulleys The Attempt at a Solution
  29. A

    Solving a Plane's Delivery Challenge: Dropping the Package at the Right Spot!

    Homework Statement A plane flies at 900m and has to deliver a package. It flies at 180 m/s North at 15° below the horizontal. The ships velocity is 40 m/s and it is traveling due north. At what horizontal distance from the ship must the package be dropped for it to land on the ship?Homework...
  30. M

    Can You Divide a Circle into 360 Equal Sections Without Special Instruments?

    Hi forum, Here is a little challenge that I came up with that some of you may find interesting:- Using only a compass, ruler and pencil, can you draw a circle, of any diameter you wish, and divide its circumference exactly into 360 equal sections? It seems to me that one should be able to...
  31. J

    Bouncing Ball Problem - 2 Dimensional Challenge Lab

    Homework Statement The object of the lab is to find the diameter of the bouncing ball shown in the pdf attached. We are working with Logger Pro. The only 2 pieces of information that we have is that the ball is on the surface of the earth, where Ay=-9.81 m/s2, and that the frames are 0.05...
  32. M

    LHC Experiments Challenge Speed of Light: 22nd Sept News

    "Speed-of-light experiments yield baffling result at LHC" - 22nd Sept News Article?! http://www.bbc.co.uk/news/science-environment-15017484 Came here to get some further information and I can't find a thread. If there already is one about this, sorry I should delete it. Very interesting...
  33. B

    The Capillary Action of Gasoline: Debunking the Gravity-based Siphon Theory

    My Siphon Challenge FINALLY! I've thought over my remarks concerning the theory by Dr. Stephen Hughes, Lecturer in Physics at Queensland University of Technology, concerning gravity, rather than differential air pressure, as being the primary source of motive energy for a siphon system. (See...
  34. codelieb

    Feynman Lectures Exercise Challenge

    Hello, all. My colleagues and I are currently working on an exercise book for The Feynman Lectures on Physics (FLP). This book will include about 1000 exercises from the original Feynman Lectures course as taught at Caltech, covering pretty much the entire range of topics in all three volumes...
  35. S

    Building a Plot with Array Data: A Challenge

    Hello. I've got an idea to build a plot in real time. What i want to do: 1) I've got a row (array) of numbers 2) for these numbers i calculate values of the expression i want to plot, put them into array, 3) use list plot or smth like that with the row and the array. The question is : how...
  36. 1

    Solving Maxwell's Equations: A Challenge

    Hello all... I have been working on this problem that I just am not being able to solve. I've been spending my spare time learning some vector calculus and non-euclidean geometry (my aim is to be able to finally tackle relativity). After learning some basic things about the del function, I...
  37. B

    A PF Challenge to all you PF'ers

    Hi Physics Forumers! I was listenining to the Feynman lectures and something Feynman said got me thinking. He was talking about the indeterminacy that exists in classical physics due to our uncertainty in the initial conditions: I was wondering how he derived this. So I thought I would turn...
  38. F

    What is the rate of change of angle for a knight jumping on a chess board?

    Some of my friends, upon finding out that I'd joined these forums, decided to give me a math challenge problem they thought couldn't be solved. Does everyone get the same answer? It goes as follows: A knight jumps on a chess board (assume it makes a legal move) from point A to point B...
  39. R

    Fun Challenge - weighted average of global rankings

    ***Fun Challenge -- weighted average of global rankings*** Goal The goal is to create a weighted average of global rankings. Does not have to be perfectly accurate (if that was even possible). Specific Example To make this problem less abstract and easier, we are going to use a specific...
  40. E

    Integral's Results Challenge Quantum Theory: GR vs. QM

    http://www.esa.int/esaCP/SEM5B34TBPG_index_0.html "ESA’s Integral gamma-ray observatory has provided results that will dramatically affect the search for physics beyond Einstein. It has shown that any underlying quantum ‘graininess’ of space must be at much smaller scales than previously...
  41. I

    Proof and challenge about projectile motion

    Hey guys, its me again! This time, I was reading about projectile motion in my textbook, and noticed that they didn't prove some of the claims presented about this topic. So I decided to try and prove it myself as a challenge. I included it here as a PDF. It's a pretty short and simple proof...
  42. E

    Solve the Problem: A Challenge!

    Homework Statement http://img691.imageshack.us/img691/8826/problem14.jpg The Attempt at a Solution I don't know where to begin... My attempt isn't even worth putting up..
  43. G

    Atomizer Design Challenge? (Bernoulli's Principle)

    I understand why liquid is sucked into a tube of flowing air with a constricted end due to Bernoulli's principle, what puzzles me is why the air doesn't just take the path of least resistance instead of inducing liquid suction (see attached image). For example, if a 1/4 inch line at 30 psi has...
  44. J

    Can you prove this inequality involving factorials and powers?

    Here's a nice problem: Prove that \frac{k!}{k^k} \leq \frac{(k-j)!}{(k-j)^{k-j}} \frac{j!}{j^j} for all natural numbers such that 0\leq j\leq k. (Convention: 0^0=1.) I proved this myself, so I'm not asking for help any more. I merely decided to mention this problem to those of you who seek...
  45. datafiend

    Can I Skip Pre-Calculus and Challenge a College Calculus Class?

    Hi all, I have read this forum on and off for a couple years' now and have finally started the road to calculus. I have a BA in Econ already (2001) and took the "Business Calc" class way back (that's what the minimum was). I find myself in a technical career (not Econ related), but have...
  46. B

    Challenge Problem that seems too Easy

    This is a challenge problem I received in my calculus class that I believe uses math lower than Calculus. My worry is that the way I want to solve it seems too simple. Homework Statement A long hallway contains lockers numbered 1 through 1000. At the start of the day, all of the lockers are...
  47. A

    Solve the 2011-Point Resistance Challenge!

    This is a fun question I found and wanted to share. Please, do not bother to tell me that I need to post equations or show my attempt as I have solved it myself. As I liked this question I am sharing it on PF. Here it goes: There are 2011 points randomly chosen and a resistance R is...
  48. I

    Challenge Problem: Solve & Get Help

    Hi all, I've attached a challenge problem I've been working on and have been running into some trouble... Thanks in advance.
  49. R

    How should I deal with my laziness, aversion to challenge & overall stupidity

    This really doesn't have anything to do with what most of you are familiar with, but I'd probably peg you guys above average in intelligence relative to other forums so I thought I'd give it a shot. I had a pretty good GPA and above average SAT scores coming out of high school that enabled me...
  50. M

    Do Pringles Cans Really Contain 100 Crisps?

    Pringles "100 Crisps" Challenge If you look on a can of Pringles, it says "100 Crisps In Every Can, On Average" Here's a challenge for you all (if you guys are up to it): Buy at least 2 cans of Pringles. Count the number of Pringles in each can, then post those results. EDIT: To clarify...
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