Fun Definition and 428 Threads

Happy new year for you all, This is very nice place, So girls and boys, let me give you something to play with: Integrate (r^.a)(r^.b)(r^.c)(r^.d) d(cos8) from cos8=1 to cos8=-1. a,b,c and d are constant vectors, r^ is the unit vector (iX+jY+kZ)/|r|, 8 is the spherical angle between r^...

Hello everyone, we found 3 igan values: 1, 2, 3 for the last case: 3 we came out with 0 -1 0 0 -1 0 2 -2 -2 he wrote b = 0, a = c; then said igan vecotr is: 0 1 1 but clearly shoouldn't it be: 1 0 1 ?

Hello everyone I'm stuck on this problem, how its wrong, i got parts a and c, but b i can't get. Hre is what it says: Consider the following general matrix equation: [a1 a2] = |m11 m12| * [x1 x2] |m21 m22| which can also be written as A = MX Determinant of M = m11m22 - m12m21 A...

I'm studying for my exam on monday and i saw ap roblme that says: Determine if the following is a subspace of R^3. For it to be a subspace it has to pass 1) must have the zero vector 2) closure under addition 3) closure under multiplaication here is my work...

Okay, here's the deal. We all know the law of independent probability after a broken sequence. For example, if you were to flip a coin 100 times, the first 90 times coming up heads and the last one tails. We all know that each flip is 'independent' of the last flip so long as they are taken...

Play it here: http://www.thegn.com/Playgame/Flash_Arcade/Puzzle_Games/N_Game.html Or download it here: http://www.thegamenetwork.com/stickpagehosting/ngame/n_v1pc.zip (Finding threads with links to website games here...:rolleyes: told me post this link in General Discussion)

My grade 12 math teacher gave us a question that I found to be very interesting. You have 12 identical keys. 11 of the 12 keys have the same mass. Only one of them has a different mass. You have a scale, but it is not digital and it does not tell you the actual weight. It only shows you which...

Hello everyone I'm confused on finding the null space on this problem: the matrix is: 0 2 0 -5 0 1 4 0 0 0 1 0 0 0 0 1 null(A) = 2b - 5d = 0 b + 4c = 0; c = 0 d = 0; b = 0; a = ? You don't know what a is, so I'm quite confused. Any help?

How much, often and how do you like to poke fun at your friends, neighbors, relatives, pets, strangers, local politicians and laywers? I think I end up saying a lot of things that piss them off. One time I compressed an ice cube onto my dog's balls while he was sleeping. *tee hee!* :approve: I...

Riding a Loop-the-loop. A car in an amusement park ride rolls without friction around the track shown in the figure. It starts from rest at point A at a height h above the bottom of the loop. Treat the car as a particle. http://community.webshots.com/user/mmaddoxwku" What is the minimum...

Heya, The seniour mathematics teacher at my school has given me (and a few others) the task of designing a 'Math Fun Day'; an event in which about 200 crazy 12-13 year olds visit our science and mathematics school to participate in mathematical activities/games. We're running short on...

Hello all, I have been involved in a discussion on another forum about the TV show Lost. For those who haven't seen it a character (Hurley) wins the lottery with numbers that are supposedly 'cursed' and ends up stranded on an island. It turns out that the island is actually all about these...

1. A 52.0 kg person takes a nap in a (lightweight) backyard hammock. Both ropes supporting the hammock are at an angle of 14.9° above the horizontal. Find the tension in the ropes. 2. A backpack full of books weighing 52.0 N rests on a table in a physics laboratory classroom. A spring with a...

Alright, this one has been bugging me for awhile now. "In the following addition, each letter represents a different digit. Find the values of the letters." .. S E N D periods are just there to push the "S E N D" over. + M O R E --------- M O N E Y Here's what I...

Q&a Game For Fun ! Ok... Just came across something weird and interesting in one of my physics books and I thought I'd share it and start one of those Q&A games I've seen on this forum! "When two parallel uncharged metal sheets are placed in a perfect vacuum, they attract each other with...

I have a lot of questions and I know I'm supposed to show all my work but the post would be insanely long, so I will show you what answers I have come up with on the ones that I managed to get that far. I know how to do these but I often get hung up on the fractions and trying to get rid of the...

http://www.kia-glitz.com/images/humour/0290.jpg http://www.kia-glitz.com/images/humour/0410.jpg http://www.kia-glitz.com/images/humour/0452.jpg http://www.kia-glitz.com/images/humour/boom.jpg http://www.kia-glitz.com/images/humour/Canine_Bark.jpg...

This one has about 50 questions on social and political issues. After you take the survey, your political compass is scored and shown relative to figures such as Ghengis Khan, Gandhi, GWBush, Chirac, Nelson Mandela, and so on. On another science board, all the scientists ended up in the same...

http://img62.imageshack.us/my.php?image=geometry9cn.png

So, I'm going to be a camp counselor this summer, and I'm basically just looking for any ideas you guys might have. Basically, any outdoors games, or games that can be played with simple materials. or, any interesting woodsy stuff... like orienteering or what have you. typical stuff... I'm sure...

I was hoping you guys would share your stories of perpetual motion schemes and wacky theories of that nature. The more our understanding of the laws of physics grow the more the human imagination wants to break them.

This is a really fun probl, I've been trying to get for a while: A 600 N man stands on a bathroom scale on elevator. After, it starts moving the scale reads 900 N. Find Acceleration (magnitude/direction) EF = ma weight - T = ma wt - T = ma (600 N)(9.8 m/sec2) - T = ma i noticed i didn't...

Aero, EE, ME?? which one is fun? My high school finally ended yesterday, and now i am so confused about my future education... and here is my story i came to USA during high school, this didnt do anything good because the confusion of GPA. It ended up very bad that every good engineering...

Giant Paper Tower :) Fun Hello, My physic's class has been kicking butt all year, so much in fact that we are done with the book early. My teacher is having a contest for us. Build the tallest paper tower we can... ONLY using paper, but as much paper as we want. Construction MUST take place...

Find the flaw in the following reasoning: -4 = -4 \frac{-4}{1} = \frac{4}{-1} \sqrt{\frac{-4}{1}} = \sqrt{\frac{4}{-1}} \frac{\sqrt{-4}}{1} = \frac{\sqrt{4}}{\sqrt{-1}} \frac{\sqrt{-1}\sqrt{4}}{1} = \frac{\sqrt{4}}{\sqrt{-1}} \frac{2i}{1} = \frac{2}{i} 2i^2 = 2 -2 = 2...

Q: A 55.3 kg person jumps from a window to a fire net 21.9 m below, which stretches the net 1.04 m. Assume that the net behaves like a simple spring, and calculate how much it would stretch if the same person were lying in it. Here's what I did: using conservation of energy to get the...

http://pacific.uta.edu/~qiming/Project2.htm Mind you this is solving NUMERICALLY(hence Euler's algorithm)not analytically *THIS FOLLOWING PART IS JUST ME EXPLAINING WHAT I DID, it's hard to put into words, if you can follow it and spotted a mistake, let me know* quick assist to get you...

Quantum Physics... And you thought this thread was going to be serious. Anyway ... finally, today quantum physics was started in my college lectures. Most people in the room hated the sound of it but I was ready to go. After the lesson my friend said 'I didn't realize quantum physics...

Are there any other geology/palaentology enthusiasts that like to do a spot of fossil collecting when they get a chance? Or maybe you don't like geology, but just think ammonites are cool? What were your best finds? Where are your favorite fossil hunting spots? Photos would be nice. I...

For a brayton cycle on a pressure and temperature diagram, using helium gas, is it reasonable to have the net work for the cycle and the change in Q for the cycle to come out to be equal to each other?

Yesterday I filled my tank and it cost $40. I walked back into the office grumpy about this only to find one of my co-workers had emailed these to me: http://img236.exs.cx/img236/8493/pic002485kp.th.jpg http://img236.exs.cx/img236/1736/pic006114xo.th.jpg...

As a college student I have a lot of extra soda cans around I thought it would be neat to tryto have some fun with them. What I would like to do is make some sort of solenoid or system of solenoids that would launch a soda can. What I am wondering is if an aluminum can is afected at all by the...

Hi, I am playing around with doing stuff recursively, just to practice, and I have a problem I can't work out. I want to write a recursive function that will sum the digits of a number, take the result, sum those digits, etc. until I reach a single digit number. Then I want to return that...

Is it really fun to shoot people?? Re a quote I read this week in Newsweek: Spoken by Lt Gen James Mattis Is it just me that thinks guys like this should be thrown in the stockade? I'm not an American but I would sure like to know what Americans and others think of this mentality. And...

obviously it wasnt told as a myth to me. But has anyone heard this? It's biology and physics mixed. Basically I'll paraphrase to my version messing up points that probably are meant to happen. There is a woman she becomes preggo. She's goes to get ultrasound when its time or whatever...

what is the process for combining 2 equations?

A particle moves in the xy plane with constant acceleration. At time zero, the particle is at x = 2m, y = 1.5m, and has velocity Vo =(3.3m/s)i + (-7m/s)j. The accelerationis given by a = (6m/s^2) i + (5.5 m/s^2)j. What is the x component of velocity afer 1.5s? im stuck

Looking for ways to liven up your next quantum physics party? Shine a light through a polarized lens. Align and rotate a 2nd lens until the light intensity is reduced to 50%. Align and rotate a 3rd lens until the light intensity is reduced to 25%. Next ask your guests what will happen to the...

Explain why a point on the rim of a tire has an acceleration when the tire is on a car that is moving at a constant linear velocity :cry: :smile: :mad: :rolleyes: :approve:

Some fun tidbits. A law passed in Nebraska in 1912 really set down some hard rules of the road. Drivers in the country at night were required to stop every 150 yards, send up a skyrocket, then wait eight minutes for the road to clear before proceeding cautiously, all the while blowing their...

:biggrin: Thanks 42, the feeling is http://www.baker-street.net/tiger/ . :smile::-p

Friend's birthday I have decided that the post was not appropiate before so I edited it. The short summary of what was there was about my friend's birthday party. It was the girl I went to winter formal with and it was a very interesting experience. Abour 40-50 kids met at Damon's for dinner...

Does anyone know any laser jokes? I'm doing a short presentation on laser diodes and thought it might be fun to include a refreshing page of jokes near the end. I found a few on Google, but none were very funny.

Complicated But Fun! Try It See What U Get! (x^(2)+6x+5)/(x^(2)+7x+12) MULTIPLIED BY (x^(2)+2x-8)/(x^(2)-25) ____________________________________________________________ ALL DIVIDED BY (x^(2)-x-2)/(x^(2)-2x-15) OK SIMPLIFY THIS...

Fun game! Participate if you can! Alright I'll try to make this brief. The rules: PM with your guess of a non-negative integer (ie. 0, 1, 2, 3, 4, 5, 6, 7...) The winner(s) will be the ones who choose the least number with the least number of pickers. For example, if there are 5 people...

Here's the Question : A 5.00-kg mass is on the end of a massless rigid rod of length l=70.0cm which pivots freely about the other end. The mass is moving in a verticle circle. When the rod makes an angle of theta=55.0° with the horizontal, the speed of the mass is 1.60 m/s. a) calculate...

Three identical masses of 650 kg each are placed on the x-axis. One mass is at -13.0 cm, one is at the origin, and one is at 42.0 cm. What is the magnitude of the net gravitational force on the mass at the origin, due to the other two masses? I solved this problem in the homeowrk section of...

Post-Halloween fun! Check this out :biggrin: http://www.chezmaya.com/applet/squelette.htm

Mining Games! i didn't know if this was suited for the engineering forum or the general discussion, since its about engineering but its not a question, if I'm in the wrong forum please forgive me here goes, I'm so pumped i made my schools engineering mining games team, i am the the only...

My experiment is simple in essence: Its title is, “times for a trolley to roll down slopes of differing lengths and inclinations.” So basically I have a slope and I let a trolley slide down it from differing lengths and inclinations timing how long it takes to get to the bottom of the slope – I...