What is Interesting: Definition and 789 Discussions

Interest is a feeling or emotion that causes attention to focus on an object, event, or process. In contemporary psychology of interest, the term is used as a general concept that may encompass other more specific psychological terms, such as curiosity and to a much lesser degree surprise.The emotion of interest does have its own facial expression, of which the most prominent component is having dilated pupils.

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  1. T

    Are There More Interesting Numbers Like This?

    26/65 = 2/5 (cross out the sixes) 16/64 = 1/4 (again cross out the sixes) are there anymore *interesting* numbers like this? by interesting i mean that its not 11/11, since you can obviously cross out the 1's and get 1/1. the numbers have to be different also, are there any 3 digit...
  2. G

    Solve Interesting Problems at Home - Post-Undergrad Physics

    I finished my undergraduate curriculum in physics and I'm out of school, working from home. School doesn't tell me what to do anymore.. I'm looking for an interesting problem I can work on, either a problem that could be solvable mathematically or some hands-on-experiments that I can do at home...
  3. M

    Can You Solve This Challenging Integral from a Test Question?

    An interesting integral appeared on a test that I took today. I had no idea how to solve it, and was wondering if any of you all could possibly help me \int_{0}^{1} \frac{1}{x}-floor(\frac{1}{x}) we first had to draw the graph from 0 to 1, (which has a max of 1, a min of 0 (at 1/n for...
  4. Astronuc

    Interesting Stuff - Geo-Astronomy Lectures from UMich

    Don't know how long these will be active, but they are interesting: Lecture 16 - Down To Earth III: Earth Structure http://www.astro.lsa.umich.edu/users/cowley/lecture16/ Lecture 17 - Earth and Its Nearest Cosmic Neighbor, The Moon http://www.astro.lsa.umich.edu/users/cowley/lecture17/...
  5. E

    Proving Rnl(r) Has (n-l-1) Zeros - Interesting Proof

    How can it be proved that Rnl(r) has (n-l-1) zeros (not counting those at r-0 and r= infinity? I tried doing this inductively but found it hard to get anywhere since the equations for Rnl(r) aren't too pretty. For instance, Rnl(r)=Anlunl where Anl= sqrt((n-l-1)!/(2n((n+l)!)^3) this last...
  6. I

    Why Does Ice Cream Soften Differently Than Bread in the Microwave?

    I put icecream in my microwave for about 20 seconds. When i take it out i notice that it's softest in the centre. However, when i defrost a loaf of bread it's always softest on the outside and still cold in the centre. Why is this, and if you don't believe me try it!
  7. M

    What is the Time of Collision for Two Vertically Launched Objects?

    Pat shoots an arrow vertically upward with an initial speed of 25 m/s. When it is exactly halfway to the peak of its flight, he shoots a second arrow vertically upward from the same spot. They collide just as the first arrow reaches its highest point. (A) What is the Launch Speed of the...
  8. H

    What is the area of the triangle?

    First of all note this is NOT HOMEWORK This is an interesting geometry problem my old statistics and discrete math teacher gave to me, i solved it, however i just wanted to give it out... very tough problem (at least for me, probably easy for most poeple here) You have a triangle... the...
  9. P

    Exploring Interesting Math Topics: A Grade 12 Class Project

    I'm a grade 12 student and have been given the task of teaching our algebra and geometry class for a day :smile: . There are absolutely no restrictions on what I can teach about. It does not in any way have to be related to algebra or geometry, just mathematics in general. What I really need is...
  10. B

    Solving the 2,0,0,5 Sequence Puzzle - Prove Your Answer!

    starting with 2,0,0,5 form the sequence 2,0,0,5,7,2,4,8,1 ... where each successive digit is the unit digit of the sum of the previous 4 ( 2+0+0+5=7, 0+0+5+7=12 , write 2, .. etc.) does the sequence 4,0,5,3 ever appear ? prove your answer i have been trying to see some sort of pattern...
  11. A

    Solve Equation y=3o(x)4: Inverse o() & 4D Graphs

    Assuming o(1) is +, o(2) is *, o(3) is ^, etc how would you go about solving an equation such as: y = 3 o(x) 4 (where y is a given number and you must find x) I can't imagine how you would isolate x, you'd need an inverse o() of sorts. ie: x = o'(3, 4, y) (Hey, a 4d graph needed to...
  12. J

    Mathematica Interesting Dream/Mathematical Codes

    I had a interesting dream two nights ago, I will explain it. A woman with "Angel" in her name told me the name "Deivion", after this I saw a another woman's name with an "Angel" design by it (as you would see on a card or such). Now after this a man approached me with urgentcy crying...
  13. A

    What makes quantum mechanics so interesting?

    What about the quantum mechanics captures your interest?
  14. D

    A interesting problem in relativity

    Hurklyl, you are the resident mathematician, you might check this out carefully. Relativity is really a very complex issue seldom examined in detail by anyone. For example, I suspect almost everyone here who has ever taken a course in relativity has seen the exposition on looking at the back...
  15. M

    Interesting Problem, Not sure where to begin.

    I need some help getting started on this one: Sound waves of frequency 582 Hz enter a window 1.3m wide. The window is in the exact center of one wall of a theater 24m by 12m. The window is 12m from the opposite wall, along which is a row of seats occupied by people. The theater is...
  16. N

    Help with interesting problem about momentum

    Hi, my teacher gave this problem and he said that it has a very "pretty" answer. You have two equal masses, each mass is called M that are touching each other. There is a block with mass m on top of the first mass M. This block is a distance H above the ground. When the block is released...
  17. wasteofo2

    Viruses can make zombie cells, very interesting.

    I just read the cover article in the most recent issue of Scientific American about viruses. The article was pretty interesting; it gives a short overview of the basics of what viruses do and how they do it and talks about their role in evolutionary history of organisms. The article also...
  18. G

    Can Exceeding the Speed of Light Reverse Time?

    Here are a few questions that I have built up. If someone knows the awsner to some of them, I would greatly appreteate your help. 1.If a "body" were to exceed c, then time would go in reverse for that body of motion, not time around them, right? For instance, let A travel faster than c...
  19. Saint

    What Would a Monkey Do with a Brownie Vending Machine?

    http://www.cartoline.it/pics/_zoom_flash.htm?immagine=scherzi_150404_01.swf > > 1. CLICK ON THE LINK > 2. PUT THE COIN IN THE VENDING MACHINE > 3. CHOOSE YOUR DRINK > 4. CLICK ON THE CUP WHEN IT IS READY > 5. CLICK ON "APRI" **** Don't forget to click on APRI
  20. N

    Suggestion for cool, interesting experiments

    I'm about to do this project in which we will prepare and perform an experiment and then later tell the class about it. All this in about a week. I'm now trying to come up with some interesting experiment to do during this time. I'd really like some help on the subject. I'm looking for an...
  21. P

    News Interesting rebuttle to the 'vote for values'

    http://www.sciencemusings.com/blog/2004/11/evidence-based-reality.html Follow the links for further discussion, like this one... http://www.boston.com/news/globe/editorial_opinion/oped/articles/2004/10/31/walking_the_walk_on_family_values/
  22. N

    Interesting Friction problem (please assist me)

    This is a problem needed for a project...i have no clue what to do... two rods are lying parallel, with a third lying perpindicular across them, like a football goal post. how does one relate coefficient of static and kinetic friction between them, if only distance is measurable. This...
  23. M

    Suggestions for an interesting physics topic which i can research/do project on

    hi, I am looking for any suggestions as to an interesting and relatively deep (but not too deep) topic to do a presentation on. This can be anything to do with physics e.g the collapse of the tacoma narrows bridge, particle physics, time travel, the doppler effect or any physics phenomena. Any...
  24. P

    Interesting article about ID vs. evolution

    From the NCSE Oct 15 e-newsletter. I'm not trying to promote ID here, but it sure is refreshing to hear a voice from that arena finally say "hey, shouldn't we be using science to prove our case?"
  25. K

    Interesting Magnetix Set Question

    I'm not very knowledgeable of physics as my main focus is computer technology. However, I purchased a Magnetix set from a local store a few days ago because I remembered these kinds of sets when I was a kid. With this 20 piece set I created a hexagon and had one remaining ball left over. I...
  26. D

    What is the curious relationship between exponential and logarithmic functions?

    Greetings ! Maybe I'm just too tired and missing something, but this strange thing occured to me: a^n + b^n = c^n ln( a^n + b^n ) = n * ln ( c ) a^n + b^n =/= e^n * c example: a = 3; b = 4; c = 5; n = 2; 25 =/= e^2 * 5 Live long and prosper.
  27. S

    What are some fun and interesting data sets to explore?

    Hi everyone :smile: ! I have been looking for some data about something fun or interesting. I've only been able to find boring things like the results to a coin toss. Does anyone know of a website that has real data on something fun or interesting? ~Thanks
  28. V

    An interesting matrix identity problem

    My linear algebra professor likes to use theorems he expects us to prove later in his proofs of theorems in class. Well it's not like that because it makes sense but they're usually more of side notes. Today he asked us to prove this: Given A and B are 2 by 2 matrices over the field R...
  29. Ivan Seeking

    History WWII History buffs: Interesting CIA docs

    While poking around and reviewing some the old CIA files at the FOIA [Freedom of Information Act] reading room, I noticed a rather unusual, forty eight page document dated Aug, 1945, that discusses Japaneses espionage and secret operatives, Chinese complicity, and is titled "SHANGHAI -...
  30. A

    News A very long and interesting article

    I've had this article for quite some time, and I find it to reflect greatly on the current political situation in America. The article was written in 1938 by Garet Garrett http://www.rooseveltmyth.com/docs/The_Revolution_Was.html Take some time, read it, and let me know what you think...
  31. V

    No problem, glad I could help! Good luck with your proof.

    Are there two matrices A and B such that A*B is the zero matrix but B*A is not? I'm leaning toward no.. I'm composing my solution right now. Bah the only thing I can come up with is that if any row of A can be treated as a vector and any column of row B can be treated as a vector, for...
  32. D

    Interesting and annoying power problem

    I have a trouble with this problem: Suppose you have a particle with mass 30Kg, this particle is in influence of a force F that acts along the x-axis and F=6+4x-3(x^2) and at x=0 the particle has 0m/s speed. Find the total work made by F between x=0 and x=3, then find the power given to the...
  33. M

    News Interesting to see the detail put into campaigns

    Interesting to see the detail put into campaigns... In this case, the debates... You know, I always hear the statement of the tallest candidate winning ever since debates were televised (don't even know if that is true), but this little story really shows that every angle is being covered...
  34. S

    Interesting problem with possible solution

    here's the problem: You are given a seven digit number. Prove that you can cross off some of the numbers at the beginning or the end and you'll be left with a number that is divisible by 7. For example: 1434945 Cross off the first three and last two to get 49. I have a proof of...
  35. A

    Solve Physics Problem: 500m from Safety of Space Craft, 11.32min Air Left

    Ok. This one is giving me some trouble: A space person is motionless a distance of 500.0 m from the safety of the space craft. The person has exactly 11.32 minutes of air left, and the person's mass is 103.2 kg including the equipment. The person throws a phaser (for all you Trekkies) at a...
  36. turbo

    Will Longbets.org's Predictions Shape the Future of Sciences and Sociology?

    Longbets.org is taking bold predictions and allowing people to place bets (long term only!) about our futures in sciences and sociology. The bets go to charities and other non-profits, when resolved. Here is one that is of particular interest to this group. http://www.longbets.org/12...
  37. T

    Gain Insight into Sleep Disorders with this Interesting Article

    This was a very interesting article on sleep http://health.yahoo.com/health/centers/sleep_disorders/_101.html
  38. T

    Interesting links for everyone

    hello people, my name is tom schulte and I am from germany. I have some interesting links for you. It would be nice if you would look at them www.intalek.com www.cheniere.org www.stardrivedevice.com www.disclosureproject.org these websites tell you about some energie and propulsion...
  39. T

    Interesting links for you all to look at

    hello people, my name is tom schulte and I am from germany. I have some interesting links for you. It would be nice if you would look at them www.intalek.com www.cheniere.org www.stardrivedevice.com www.disclosureproject.org these websites tell you about some energie and propulsion...
  40. V

    Finding Interesting Books on Carbon Dating for Earth Science Beginners

    I am reading an old book about Carbon Dating and it is really boring, I dstill havenot found out there is anything interesting for me to keep going with time continuum, continuum continuum, again and again...So would you please introduce me some (old or new) interesting books on the topic for me...
  41. S

    Interesting query/observation on Amino Anomalies

    Just an interesting observation...there's no Phosphate in amino acids...why?
  42. Crumbles

    Interesting places to see in Vancouver

    I'm heading to Vancouver next week and I'm wondering if any of you have any suggestions as to what to see and where to go ... I'm actually there for 3 whole weeks, so I will have quite a lot of time to spend. Please try to keep off the likes of Art Museums coz I get dead bored :zzz: in such...
  43. H

    What does this image reveal about our perceptions?

    http://www.blessa.com/64-equals-65.gif
  44. I

    Does Spinning on a Top Cause Acceleration?

    Imagine you are spinning on a top. You naturally go to the edge, correct? Well, I have heard that you do not experience acceleration, but I would think otherwise. Though you are moving relative to the object, and the Force that it applies to you should get anything with a mass of one to...
  45. A

    Have you witnessed a dazzling Iridium flare in the night sky?

    What is the most interesting astronomical object you have observed through a telescope?
  46. P

    Interesting new concept car-runs on compressed air

    Interesting new concept car-runs on compressed "air" link here : http://www.theaircar.com/ thoughts ?
  47. Gokul43201

    Who's Behind the Graffiti on Campus?

    Come across any interesting graffiti lately ? On the door of a math dept. classroom where Calculus was being taught : 1 + 1 --> 3, for large values of 1 Finger-written on the dusty rear windshield of a car parked near my apartment : I wish I had a woman this dirty
  48. Ivan Seeking

    Interesting dog breed Labradoodles

    http://starbulletin.com/2004/06/28/news/story6.html How about a Doberman Chihuahua, or a Pekingese Mastiff? another interesting fact: http://en.wikipedia.org/wiki/Dog#Dog_breeds
  49. A

    What Happens to a Person at the Center of a Hollow Earth?

    If the Earth were hollowed enough so that a man could go to the center of it, assuming no magma, and be placed directly in the center of the Earth and assuming he was more or less symmetrical ( I know ... weird but go with me ) would he: A: Float in the center because gravity from all sides...
  50. C

    Very interesting question

    This is a question I came about while thinking about the nature of matter and energy. According to string theory, the very fundamental building blocks of matter and energy are tiny vibrating strings. I was thinking to myself then: why are these the fundamental building blocks of the Universe...
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