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. F

    What Type of Barrier and Field Strength is Needed for Spin Polarized Tunneling?

    Hello, With regards to a Youtube video- Spin polarized tunneling - video #10: , could some one familiar with electronics provide a circuit or diagram for this to work? Also what type & size of barrier could be used? This should be fairly easy for anyone familiar with electronics, so any help...
  2. 1

    Solving x=2+2 2/3 +2 1/3: A Puzzling Challenge

    Homework Statement The problem is If x= 2+2 2/3 +2 1/3 solve x 3-6x 2+ 6x-2 =0 Homework Equations The Attempt at a Solution First i tried to substitute the values but its turning out to be really big( and i get quite scared when it turns up like this and so i didn't go any further...
  3. H

    Parameterizing a Hyperboloid: A Challenge!

    NEEDD HELP! parameterizing a surface given by an implicit function (HYPERBOLOID?!) Homework Statement I need to parameterize the surface given by the following implicit equation: x2 + y2 + z2 + 2xy + 2xz - 2yz = 1 Homework Equations I tried using all sorts of subsititutions...
  4. A

    Solution to Challenge Problem: f'(x) = f(x) for all x in Q

    This isn't a homework question or anything, but I came across this challenge problem posted on a Harvard Math 25a webpage and I'm wondering what the solution to it is since no solution is posted on the page. Suppose that f\colon \mathbb{Q} \to \mathbb{Q} satisfies f'(x) = f(x) for all x \in...
  5. M

    Calculating Force P to Lift 200kg Crate: A Challenge!

    Homework Statement Determine the force P required to like the 200kg crate. Coeff. Static friciton is 0.3 on ALL contact of surfaces. Neglect Wedge Mass Homework Equations μS x Fn = Fk Summation of forces eqns The Attempt at a Solution im getting more unknowns than equations see attachment.
  6. D

    Solid Mechanics questions - A new challenge

    Solid Mechanics questions - A new challenge :) Hi all :wink: I got 3 new questions that need to be solved in about 3-4 days as part of a 'challenge' homework. Those who solve correctly will basically get their names read out loud on the next lecture but I do it to understand the material of...
  7. D

    Solving for Moon B's Orbital Period: A Homework Challenge

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  8. M

    Finding the Intersection of Two Circles: A Challenge

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  9. A

    Big challenge for best engeneer

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  10. B

    LaTeX Organizing Tables Side-by-Side: A Report Writing Challenge

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  11. D

    Verifying Beam Reactions: A Chemical Engineer's Challenge

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  12. K

    Calculating Work Done by Sled Dogs: A Frustrating Challenge!

    Sled Dogs work? A team of dogs drags a 46.5 kg sled 1.73 km over a horizontal surface at a constant speed. The coefficient of friction between the sled and the snow is 0.233. The acceleration of gravity is 9.8 m/s2 . Find the work done by the dogs. Answer in units of kJ [b]2. W=Fd F=mg...
  13. G

    Fairly Distributing Undividable Goods: A Challenge

    Can you give me a suggestion how to find a reasonable algorithm do distribute undividable goods among different people? All of the people have different preferences, but might be clashing. Also some of them might have priorities, due to not getting anything last round. So for one round there...
  14. V

    Can YOU Beat My Record for Memorizing Digits of Pi?

    Pi. An infinite number. INFINITE. People have been memorizing the digits of pi to a certain number of decimal places. A challenge for you: how many can YOU remember? I hold the world age record(i actually don't, because i haven't told anyone except my friends about it) for memorizing 1500...
  15. G

    Insane Electromagnetic Induction Question. Challenge your brains

    Insane Electromagnetic Induction Question. Challenge your brains! :D F=BIL, F=mg There is a B field acting on the rod so we resolve that. I tried to resolve the other force vectors according to: 1. Force acting on rod by gravity 2. Force acting on rod by electromagnetic (F=...
  16. I_am_learning

    Greatest challenge for science- Reincarnation

    Greatest challenge for science-- Reincarnation! I don't know about other European countries but Here in south-east-Asian country, more definitely, India and Nepal, We have a bunch of stories regarding re-incarnation or rebirth. There are lots of evidence that a boy/girl only 3 or 4 years old...
  17. WaveJumper

    A challenge to the symmetry of laws of physics

    "It's the planet that really shouldn't exist – or at least not for long. It is 10 times the size of Jupiter, orbits its own star in under 24 hours and should soon be spiralling into the surface of its searingly-hot sun..." Full story...
  18. J

    Solving Physics Puzzles in Space: A 500cm^3 Challenge

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  19. E

    Challenge: superluminal average speed

    או עם 'גי או עם 'גי
  20. H

    Egg Drop Challenge: Solving the Dilemma with Limited Materials

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  21. B

    Are you able to solve this Simple Matrix Challenge?

    I am working with 2 by 2 matrices, L, X, P and T. L = PTP -------Eqn 1 X = PTTTTTTP ----------Eqn 2 where L and X are known matrices. P and T matrix are unknown and are to be solved. The above problem looks simple but are you able to solve it?
  22. W

    Play Free Tetris - Beat My Score of 65,324

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  23. K

    Conquering the Paper and Pen Challenge: A Physics-Based Solution

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  24. K

    Egg Drop Design Challenge: Help Create a Design

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  25. I

    Challenge: Multiple Motors in Series

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  26. J

    Space Elevator: Physics Challenge

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  27. R

    F1inSchool Challenge: Design a CO2-Powered F1 Car

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  28. wolram

    Challenge, tell me what the u is about in ten easy steps

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  29. I

    I am a contestant for the M-Prize challenge

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  30. A

    Proving If Two Integers Don't Divide by 3: A Number Theory Challenge

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  31. Cyrus

    Solving Quadratic Form Derivative: A Frustrating Challenge

    I'm not sure how you apply the rules of a derivative on a quadratic form. I've been trying to find the solution on google but no luck: Basicallly: J=\frac{1}{2} (z-X \theta)^T (z-X \theta) and \frac{ \partial J}{\partial \theta}= -X^T z +X^TX\theta I can't for the life of me...
  32. H

    Solving Submersible Acceleration: A Physics Challenge

    Homework Statement A submersible with a mass of 2.75 x10^3 kg remains at a constant depth beneath the ocean surface. To make the submersible rise, 1.50 x10^2 kg of ballast is released. Ignoring friction, what is the upward acceleration of the submersible? (D = 1.025 x 10 ^3 kg/m^3 )...
  33. C

    Manipulating Data to Form a Linear Graph: A Challenge

    Homework Statement I'm given a chart of Force vs Seperation with the following values: SEPARATION (m) 0.1 0.2 0.3 0.4 0.5 0.6 FORCE (N) 0.79 0.48 0.20 0.05 0.022 Where FORCE is the y-axis, and 0.1 corresponds with 0.79. I am not given any other values. All I know is...
  34. P

    Proving the Renormalization of Phi^4 Theory: A Challenge for Mr. Fogg

    Hello, to understand the renormalization of phi^4 theory, I read Peskin Schröder and Ryder. In both books important steps are left out. I found the following identity in Peskin Schöder "An Introduction to Quantum Field Theory" on page page 808, equation A.52 (Appendix) \frac{\Gamma(2 -...
  35. B

    Exploring Orthogonality: A Homework Challenge

    Homework Statement What is \int_0^{2 \pi} \; d\theta \sin^2 k\theta \cos^2 k\theta \; ? Homework Equations Orthogonality of sines and cosines? The Attempt at a Solution I tried substitution and didn't get anywhere. Yeah, that's about it.
  36. C

    A Challenge to Special Relativity?

    Please consider this simple, but very interesting interpretation of the nature of space in special relativity. Space is both relative AND absolute. Why? Let's take a very simple example. The Eiffel Tower is 10,000 miles East from City X and 2,000 miles East from City Y. Michael is in City...
  37. U

    Four Fours Challenge: Get 44 with ONLY 4s!

    Homework Statement use five fours ONLY to get 44 Homework Equations The Attempt at a Solution
  38. A

    What materials have high, mid-range, and low electron affinity and conductivity?

    Can anyone name for me: a] a material that has a HIGH electron affinity and is a GOOD conductor of electricity. b] a material that has a MID-RANGE electron affinity and is a POOR conductor of electricity. c] a material that has a LOW electron affinity and is a GOOD conductor of...
  39. N

    Calculating Average Speed for a Trip: A Physics Challenge

    [b]1. You plan a trip on which you want to average 90 km/hr. You cover the first half of the distance at an average speed of only 48 km/hr. What must your average speed be in the second half of the trip to meet your goal? Note that the velocities are based on half the distance, not half the...
  40. S

    Plese i in this exam,its a challenge.

    Homework Statement i need help in solving this,coz i have an exam tomorrow,please help me,i search everywhere and i didnt know how to do it Homework Equations find the curvature of the fowloing curve r(t)= t i +t^3/2 j , t>0 The Attempt at a Solution
  41. D

    Falsifiability - another challenge

    Kerr black holes have 2 horizons: outer (event horizon) and inner (cauchy horizon). I also heard that inner horizon is called a Killing horizon, which is actually funny because it can KILL - literally. Even it is not proven yet, but it is possible that there is an infinite density of evergy...
  42. S

    Integrating Equations with Exponents: A Challenge

    Homework Statement Homework Equations The Attempt at a Solution Homework Statement Homework Equations u = 1+tant du = sec^2(t) dt dt = du / sec^2(t) The Attempt at a Solution It seems like I should be using substitution in the equation, however the exponent is...
  43. Chi Meson

    Compete in February Fun Trivia Challenge!

    It's February, and http://my.funtrivia.com/private/main.cfm?tid=87626". Check out the trivia sticky at the top of this page for the link after this thread disappears. The competition is month to month, with monthly winners kept in the "hall of fame." It requires a simple registration (no...
  44. R

    Calculating Volume Enclosed by Cylinder: A Challenge

    Homework Statement Find the volume enclosed between the by the cylinder x^2 + y^2 = 2ax and z^{2} = 2ax Homework Equations The Attempt at a Solution The problem can be done by evaluating the triple integral \int \int \int dxdydz , but i am not able to visualise how the second...
  45. G

    Proving Propositions: A Challenge!

    Homework Statement Prove these propositions Homework Equations If x is rational, then x + sqrt(2) is irrational. If x + sqrt(2) is irrational, then x is rational. If xsqrt(2) is irrational, then x is rational. The Attempt at a Solution I've tried a couple of ways, but I always end...
  46. G

    Challenge question for physicists

    Okay, I have been wondering this for a long time. The question concerns buoyancy of objects in water. Question: Imagine you have a balloon filled with air. Imagine the balloon has virtually zero mass, but actually has a virtually infinite hardness. You could replace the balloon with a force...
  47. A

    Solving the Last Practice Problem: A Coast Guard Challenge

    I'm studying for an exam and can't seem to get this last practice problem! I've tried many ways but still keep getting the wrong answer. The professor has already given us the correct answer to the problems, but I want to know HOW to do it for the exam! Thanks in advance :) A boat radioed a...
  48. B

    Finding the Volume of a Donut: A Mathematical Challenge

    Homework Statement Consider the circle D on the plane with the center (2,0) and radius r=1. Revolving D about the y-axis, we obtain a donut (torus). What is the volume of this donut? Homework Equations Assume: F(x)=\int^{a}_{-a} sqrt(a^2-u^2)du = (PI * a^2 )/2 where a\geq0...
  49. R

    Prove: AC=PR - A Challenge to Solve

    proof! god do i hate these things, ok here we go, A------------B------------------------C P------------Q------------------------R Given:ABC, PQR, AB=PQ, BC=QR Prove:AC=PRThe Attempt at a Solution statements/Reasons 1.ABC and PQR/Given 2.AB=PQ and BC=QR/Given 3.AB+BC=PQ+QR/All lines are...
  50. T

    Solving A Dog's Stream Crossing Challenge

    Homework Statement A dog wishes to swim across a slow-moving stream. The dog can swim at 2 m/s in calm water. The current velocity is 3 m/s. The distance directly across the stream is 50 m. If the dog points himself directly across the stream how long will it take to get across the...
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