Brain Definition and 740 Threads

I have a box when suspended from a cable in a vacuum is 4450N and is .608m wide (it's also a cube). W = 4450N = T1 (tension on the cable) V = 0.2248m^3 When I suspend it into a liquid, L/2 m from the surface, of density 944 kg/m^3, I want to know the buoyant force, the new tension of the...

I've got a U-tube filled with Mercury and water. If I add 11.2 cm of water to the left side, how much does the mercury rise on the right side? For simplicity's sake, D will stand for density, p0 for initial pressure, w = water, m = mercury, h = 11.2 cm for the water and d = the distance the...

What are the effects on the brain from hashish could anybody tell me? From the stage that one is stoned to the stage that the stoned feeling has decayed. And are there any long term effects from this substance? Does it really kill off brain cells for good? And why do you become so creative...

A boat is docked at a shore. A ladder is hanged from top of the boat So that the last step is touching the water. The distance between steps is 20 cm and there are 4 steps in the ladder. A tide is raising the water-level 5 cm a min. How long will it take for the water to reach the top step.

On average, how long can a human brain survive without oxigen without being noticably damaged? Thanks.

there are 10 boxs of beans. in each box there are 10 beans. of the 10 boxes, 9 of them have beans weighing 1 gram each and the remaining one have beans weighing 0.9 grams each. the boxes are now placed side by side randomly. you can only use the weighing machine once, find out which box contains...

if ur in ur car traveling faster than the speed of light & u look at ur self in the rear view mirror will u see ur face ( or should i say the light reflecting of it) ?

Yu no 1/x, right ? so what is 1/5 ?

I saw this in an old, junior-level, classical mechanics textbook and haven't been able to figure it out. A particle undergoing simple harmonic motion has a velocity: \frac{dx_1}{dt} when the displacement is: x_1 and a velocity \frac{dx_2}{dt} when the displacement is...

I heard this story from some of my classmates. A gal just joked with a guy, and they kept joking everyday, finally they got married. one year later, the guy told his friends that he really regretted having married the gal and the gal told her friends that it was a big mistake to have said YES...

A person is alive, animated, breathing, communicating, thinking, moving. There is brain activity - an energy which can monitored by a machine. Then suddenly their body is a cold lifeless shell and no brain activity can be found. In the terms of physics - what has happened? Where did that...

hi! i have two brain teasers (more like logic questions) which I received in class today...if anyone is able to tell me the actual answers that would be excellent! thanks! 1. Falling Rocks A boulder is many more itmes heavier than a pebble- that is, the gravitational force that acts on a...

Paradigms The study of brain is now at the same point as was the study of biology before Darwin. There is no paradigm of mind. For anyone wishing to understand brain does this mean that we cannot go on? Does a lack of a paradigm halt all investigation by the laymen? Are we laywomen...

show that a^13 is congruent to a (modulo 2730) if a is an integer such that a is not divisidble by 3, or such that a IS divisible by 9, then a^7 is congruent to a (mod 63) with these, could i just divide the mod numbers by the powers? that is what i am doing, but it seems like as though...

hey i have more problems that can really exercise the mind! here are 3. 1. prove if q is divisible by (r +s) then either q is divisible by r or q is divisible by s. 2. if d>0, (fd+ed) = d(f,e). proof. 3. a divisible by b => a^m divisible by b^m a,b,m are in Z+. i think i have...

if x and y are pos. int. then rx >=y. x is an int. help!

"An elevator is moving upward at a constant velocity of 2.5 m/s. A ball is launched straight upward from the floor of the elevator with an initial velocity of 4.9 m/s (relative to the floor). (1) Determine the time the ball takes to reach its highest point from the standpoint of a person not...

http://www.popsci.com/popsci/medicine/article/0,12543,573349,00.html . I try to avoid using cell phones. I figure I'm exposed to enough radiation daily, and using a cell phone is unnecessary. How often do you we hear things we want to hear on cell phones anyways? It's usually news about...

I have nearly exhausted all explanations, and tech support ran out of options long ago, and I can only guess at what is happening here, so I am passing this along as a good brain teaser if nothing else. If anyone knows a solution that would be great as well. We have Direct TV and a two TV...

http://www.youramazingbrain.org

I heard this one a while back: A Hungarian community of married mathematicians has the following tradition: should any man determine that his wife cheated on him, he shall hang himself at noon. The townsfolk being rather introverted, there is little gossip except when there is an affair. In...

Trigger the brain wif a little Radiation/...? PLS CorrECt me If there is anything that is incorrect! ...is it true that radiation cures deprssion? ...is it because of the mind, when triggered by radiation will tend to change into a different state of activeness! eg: when u'r exposed to...

Tommorrow I have a practical on the dissection of a fetal pig I have been doing all week. Today I removed the brain- intact out of the pig. I have completely forgotten a couple parts of the brain- and would like to remember them when I have the test tommorrow. Since the pig brain is similair in...

Umm I hear that some scientist often get together with architects and engineers to discuss the importance about having windows to allow natural sunlight to enter. I heard it was discovered that natural sunlight actually helps in the slow process of creating new brain cells. Is anyone familiar...

Brain Thumper #8 The Pacific Proprietary Production Plant has the capacity to manufacture straight sections of miniature railroad track on two machines, each of which produces a specific length of track. For instance, suppose that the company had initially configured the machines to make...

Brain Thumper #7 What is the greatest number of knights that can be placed on a chessboard such that no two pieces are in a position to attack each other? Please provide your solution.

Here is an interesting article in the NY Times about scientists using M.R.I.'s to study the responses of Democrats and Republicans to various images and commercials. There are no solid findings yet, but it is interesting nontheless.

Brain Thumper #6 Find the smallest positive integer that does not evenly divide any Fibonacci number in the sequence starting 1, 1, 2, 3, 5, 8, 13, 21, etc.

Brain Thumper #5 Five transit centers are evenly spaced near the perimeter of a small city. Any two transit centers are connected by exactly one route. Additionally, from each transit center there is one route that extends into the suburbs in the shape of a large colorful lollipop. The five...

I got this one at the last class at the end of my course in mathematics last semester... I have 10 stacks of gold coins with 10 coins in each of them, but one of these stacks of coins is false and therefore the weight is presumed to differ from that of the non-fake ones. How I am supposed to...

Brain Thumper #4 First some definitions. A bloc of voters is a group who cooperate to achieve their common goals. In other words, they have the same preferences and vote strategically, which means that they coordinate their votes so as to maximize the outcome. We will assume political party...

Brain Thumper #2 Three reasonably thin ropes of more than sufficient length are specially made so that they connect seamlessly at the ends. One is red, one white, and one blue. They are floated in a large kiddie pool which is then drained for the following game. A person picks a location in...

OK, here's the problem L^{-1}\{\frac{s}{s^2+4s+5}\} What I did: L^{-1}\{\frac{s}{(s+2)^2+1}\} =e^{2t}\cos{t} The book says: =e^{2t}\cos{t}-2e^{2t}\sin{t} Where did the 2e^{2t}\sin{t} come from? Mahalo.

It's time to study ancient Laurasian civilization. Here's an important formula that may or may not look familiar: L = J'6oAL EL5J YCAQ JC5C 68oL -> 5'TYoA QELL |6T5 LLC5 J5dd i Some common numerical sequences are encoded below: J, d, E, o, Q, LL, Ld, L8, dQ, E2, 56, o8, J|2, JE8, T88...

"Would an AI unit, with a quantum brain, be more conscious than a Human if" Would an AI unit, with a quantum brain, be more conscious than a Human, if it had adquired, the ability to sense all wavelenghts?

When I first bought my XBox I got 5 games to go along with it. I couldn't believe how little money I had left in my pocket when I left the store. I had walked in with nearly $400.00. Nearly half of the total cost was for the games and one of those came with the XBox. "Splinter Cell" cost as...

Unfortunately I don't have time to regularly post new brain teasers, I'm sure most have you have noticed :biggrin: So this means I am opening the forum to all. If you have a brain teaser you want members to try out, be my guest and post it! Please keep all threads solely brain teasers and...

Is Maths an underlying principle of nature or did it originate from our brain? I think we would agree that Maths is abstract, but would it be there if we wouldn't be here? Maybe Maths is an underlying principle of nature that our brain is capable of taking notice of in an abstract way. ...

how does a brain work? say a baby's one easier. i have no idea where should i post this?

In the thread about racists, it was said that research has been done by racists to prove that africans have smaller brains. What I'm wondering is why anybody would care. From what I've seen, bigger brain doesn't seem to make people smarter at all. The smartest people I've ever known were...

One of my recent problems is with double integrals... and I am having a brain fart on the \int ln(u) du can you do this?

http://www.biomedcentral.com/news/20040324/04

What gives rise to what we call consiousness? As I can't think of a better definition of consciousness than subjective experience (emotion, feeling), we can use that unless someone comes up with something better. What functions and structures of brains yield or are associated with...

Wow, this really got me once I first looked at this site, but a search on google revealed that this is just another hoax web-site! Brain Transplantation! Give me a break! http://216.247.9.207/ny-best.htm Check it out and have a laugh!

My teacher gave this problem to my class, for anyone who was failing, only one person was able to solve it correctly. It has been driving me crazy for almost two years. Alot of peolpe have said that it is impossible, but I assure you it is not. It was solved by a 17yr old student. here is the...

I think my brain is freezing. I can't see how to get the answers to these questions. A poker hand is defined as drawing 5 cards at random without replacement from a deck of 52 playing cards. Find the probability of each of the following poker hands. (a) Full House (one pair and one triple...

Over the years I have run across a few surprising facts about electrical components. I thought to pass on a couple of these [somewhat obscure?] interesting and often important details. So here are a couple of questions to chew on. 1). Why is it bad to oversize a relay contact? In other words...

A salesman has 6 baskets containing eggs. There are 5,6,12,14,23,29 eggs in 6 baskets respectively. They are either ducks or Hens eggs. The salesman says if I sell one out of the six baskets containing eggs, then I would have chiken eggs twice the no. of duck eggs which basket was Salesman...

Pic included. http://news.yahoo.com/news?tmpl=story2&u=/040115/480/indp10701152008&e=6&ncid=1756

Sorry if I am posting in the wrong forum.Please be gentle since it is my first post Found it in a magazine...and as much as I've tried - I cannot solve how it is done. I am sure someone can be of help. 1.First of all, pick the number of times a week that you would like to eat chocolate...