Head Definition and 411 Threads

An alternator attached to a water turbine generates 35 Watts given 50 feet of head and 10 gallons per minute. Assuming that the efficiency of the alternator is 50%, is it possible for me to find the angular velocity from this information? If so, how would I do it?

How to tell if your head is about to explode...? http://www.mit.edu/~mkgray/head-explode.html Interesting. Can someone just validate this for me from a second news source. Just so I know this isn't a big joke.

Please see the thread: https://www.physicsforums.com/showthread.php?s=&threadid=7946

Okay guys get this. So there are these two or three kids at school that seem to think they're so intimidating (they might be for some people) that like to pick on me and sometimes a friend of mine also. They're your typical bullies, ugly hair, earings, and one that always wheres a leather...

I saw a program about two serious studies done to test the notion that people can tell when someone is behind them looking at them. One study was conducted by a woman who explained to the volunteers that the point of the study was to show there was something to it. The other study was conducted...

I think you may be the first person to accuse the UFO crowd of lacking creativity. http://www.abduct.com/question/q186.htm http://www.syndicate23.com/index.cfm/resource_id/107.htm http://library.thinkquest.org/C004978F/ufo_aliens.htm?tqskip1=1&tqtime=1019 This is me: Now don't...

The question asked me to find the head of a vector [a,b,c] whose length is 3 and is in the same direction as vector a=[-3,-4,12] So I found the follwing: Let vector x be the unknown vector |a|=13 |x|=3 Since they are both in the same direction, they both must have the same...

Here is a true story for your consideration. I once worked with a guy who some years previously had taken a direct hit by lightning - right in the head. As you might imagine, I asked him what it was like. First, he spent about six months in the hospital. It put him in a coma among other things...

"In short - the Big Bang could not have occurred if the universe is infinite - and the Big Bang has mounds of evidence." this is a common fallacy the particular instance was recently posted in mathforum's "infinity" thread people who actually study the big bang, the CMB, inflation...

what does it mean ?

Maybe I'm a little slow, but the true meaning of pi just occurred to me. tan(pi/4) = 1 arctan(x) = [sum]n=0[oo] (-1)n * [ x2n+1 / (2n + 1) ] pi = 4 * arctan(1) = 4 * [sum]n=0[oo] (-1)n * [ 1 / (2n + 1) ] = 4 * ( 1 - 1/3 + 1/5 - 1/7 + 1/9 - 1/11 + ... ) = 4 * ( 2/3 + 2/35 + 2/99 + ...