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Click here to grab Fred's book (while it's still free!)

New Puzzle:
If I drop a rock into a well and it takes me 6 seconds to hear the splash from the time I drop the rock, how deep is the well (from where I dropped the rock to the water level).
You may need: Air speed is 343 m/sec and x=1/2 g t^2 where g=10 m/sec
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NO ONE HAS TRIED THIS WEEK'S PUZZLE. TOO HARD? TOO STRANGE? WHAT KIND OF PUZZLES WOULD YOU LIKE TO SEE HERE??
If you or your company would like to sponsor this weekly puzzle for any length of time, please e-mail the professor.
This week’s puzzle is sponsored by Downtowner Magazine – Not a Location…A Frame of Mind. Be one of the first five (5) people to solve this correctly and inform me by e-mail, and you will win a free subscription to the Downtowner. The first correct solution also wins a "Get Freducated" hat.
The subject should contain the word PUZZLE and your answers: 1E, 2B, 3B, etc.
This will be the format of your solution in general, i.e., PUZZLE brief answer (as subject of e-mail) then contact info within). The body of the e-mail should contain your contact information:
Mr./Mrs./Ms./Dr./Duke Did I. Win YOU DON'T HAVE TO WIN A GET FREDUCATED HAT TO WEAR ONR WITH PRIDE. JUST E-MAIL ME AND I'LL LET YOU KNOW HOW TO ORDER ONE.
The Professor's weekly brain teaser for Sunday, February 24 -- Sorry to post this on Wednesday, but I lost a day and a half to a migraine. (I hope this little problem doesn't give you one!)
I have a steel wire 5.2 meters long whose mass is 4.8 grams. It hangs from an overhead beam. A 12 kilogram brass monkey is attached to the wire (actually the monkey is 50% brass, 30% gold, and 20% silicon). How much energy is stored in the wire once I suspend the monkey? (Answer should be expressed in Joules, please). If you make any unusual assumptions, please list those in the body of your e-mail answer. You probably want to know that steel has a density of 7.8 grams/cubic centimeter and its Young's modulus is 20 x 1010 Pascals. Please note that only two sig. figs. are required in your answer. So, you would say: 34 Joules, not 34.254 Joules, OK?
I got this problem from the fifth edition of PHYSICS by Arthur Beiser (Addison-Wesley publishing). I believe that this book is one of the best presentations of physics one can get without the use of calculus. For the "best" treatment of physics with little or no math, try "Conceptual Physics" by Paul Hewitt. It is a nice introduction to why mechanics is the way it is without bogging the reader down in long derivations. It includes a pretty good chapter on Einsteins relativity too. All in all, a really nifty job!
EXTRA CREDIT (for those who 'hate' the 'pure math/physics' puzzles): If 21 chickens can lay 21 eggs in 21 days, how many days are required for 14 chickens to lay 14 eggs. In general, how many days are required for n chickens to lay n eggs? How many days would be required for 2n chickens to lay n/2 eggs? OK, I'll stop. I've talked about this chicken/egg puzzle on the air, so no prize for getting it right.
The Professor’s weekly brain teaser for Sunday, February 17 --
Six radio hosts – Big (Steve), Caldara (John), Douglas (Steve), Earhart (Amelia), Fred (Ebert), and Gunny (Bob) are auditioning for a time slot for a new KOA show. These auditions will take place over four consecutive days, starting on Thursday. Each host will have one audition. The days on which the different hosts will audition must conform to the following rules and conditions:
At least one audition will take place each day.
Big’s audition must take place on Saturday.
No more than two auditions will take place on any one day.
On any two consecutive days there can be no more than three auditions.
Caldara’s audition must take place on a day during which there is another audition.
Fred’s audition must take place on a day before Gunny’s audition.
Douglas’s audition must take place on a day after Earhart’s audition.
Five questions for your consideration:
#1) If there is only one audition on Thursday, which host could have that audition?
A)Big B)Caldara C) Douglas D)Fred E)Gunny
#2) If Big’s and Fred’s auditions are on the same day, which of the following must be true?
A) Douglas’s audition will take place on Thursday. B) Douglas’s audition will take place on Friday. C) Gunny’s audition will take place on Thursday. D) Caldara’s audition will take place on Sunday. E) Earhart’s audition will take place on Sunday.
#3) If the program director decides to hold two auditions on Thursday and two on Sunday, how many hosts would be eligible to audition on Friday? A) 1 B) 2 C) 3 D) 4 E) 5
#4) If Earhart and Gunny have their auditions on the same day, which of the following must be true?
A) Earhart’s audition will take place on Thursday. B) Fred’s audition will take place on Friday. C) Caldara’s audition will take place on Saturday. D) Gunny’s audition will take place on Saturday. E) Caldara’s audition will take place on Sunday. 5) If Earhart auditions on Saturday, which of the following hosts cannot audition on the same day as any other talk host?
A) Big B) Caldara C) Earhart D) Fred E) Gunny  The Answer |
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On Air Details
Stump the Professor The KOA Continuing Freducation bell rings... Sunday Morning at 8:00am Class is in session for three hours. Missed class this week? Don't forget the podcast!!
Produced by Ben and Rick who field abut thirty of your questions every week and feed them to me for answers on air. I could not do a show without their expert help! They are my TAs and I really appreciate their expertise. |
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Personality Contacts
I missed an hour and would like to hear it now (or downliad it on my i-device)...
Stump The Professor Audio
I have a question for a future show...
Click here to contact the professor.
I would like to call the show live on Sunday morning 8-11am...
1-303-713-8585
I've just got to send you this...
Fred Ebert Stump the Professor c/o 850 KOA Radio 4695 S. Monaco St Denver, CO 80237
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Personality Bio
Fred Ebert is a Princeton educated professor of chemistry and mathematics and has been teaching for about thirty years. He has worked in and consulted for the military industrial complex and intelligence community for many years. Battle tactics, threat analysis, war games and simulations of hardware are among the fields of interest in these endevors. He holds eight patents in control theory (the stuff that allows planes and missiles to find their way) and AI. When not engaged in research or teaching he is busy thinking up new ways to procrastinate on his Calculus book: a totally new way to teach AP students born out of twenty years of private lecture notes. He and his wife, Kimber (much prettier and smarter than he), live with their fawn greyhound, Freedom a.k.a. Sparky and grey cat, Scuttle Butt, a.k.a., Baby. |
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Personality Links
These are folks I admire for one reason or another. This list is a work in progress. Each entity is an honorary professor at the KOA University of Continuing Freducation.
Steve Phillips, M.D. advises listeners from time to time on health matters. He is a brilliant, board certified eye surgeon. I was 20/400 (I could squint and make out the BIG "E" on the chart) without correction before I met Steven. He really took his time and made sure that he would be able to help me BEFORE agreeing to accept me as a patient. I endorse him not because he pays me (he does not) but because I admire his dedication to his art and his expertise. I am 20/20 now and only have to wear my professorial looking readers (a badge of age). I know that a visit to him is quite a hike, but Seattle is a great place to visit and you might come back with the best gift possible: better sight. This was a "life defining moment" for me.
http://www.soundeye.com/
A man for whom I have great repect is architect Kevin Wilkes. He founded Princeton Design Guild and is an artist in every sense of the word. His accomplishments speak for themselves, and just when I think he has achieved a new level of design or defined himself in yet some other great way...he does it all over again while the applause for his last accomplishment is still being heard. Here is a link to his web page. He is a really down to earth fellow. If you or your company plans to do something that is unique in the world of building -- he's your guy (and he is his own vertical holding company with architecture, landscape architecture, construction, word working, and design).
http://pdguild.com/
This guy (Frank Armbruster) is all around a fun fellow to know, and I am lucky to have met him through this KOA gig here in Denver. Frank loves education, and he makes it fun. We talked at length after the show one day, and we really hit it off. He takes joy in teaching and learning and like I, he is really young (on the inside where it counts)! Ask him about his huge collection of tractor parts.
http://www.armbrusterpuzzles.com/ |
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Heatin' Up Ye Olde Planet, et. Al (Gore)
Wednesday 08-13-2008 10:32am MT
Here is a report on Anthropogenic Global Warming (AGW) issues... http://www.climate-skeptic.com/2007/09/chapter-4-skept.htmlIt is not so much an honest disagreement about how data is to be interpreted, but rather some all out fraudulent manipulation of datasets and individual data points to "proove" that global warming is real and man made. Bad science! The following was assembled, written, and edited by a teacher degreed in math and physics with 30 years of experience. I have seen how "fired up" his students are about learning the subjects he teaches. I have much respect for his years of service and dedication to attacking ignorance in science with great teaching. Not all of the links work within "my" cut and pasted version, but this is not anyone's fault but mine. I wanted to introduce you to Daryl Taylor's thoughts on global warming. Not everyone enjoys "the spotlight", but I am going to ask him to be a guest on a future show. I believe that what he has to say about science education based upon his myriad years of experience would be quite instructive. I know that I would probably learn a lot from what he might share. An Inconvenient Truth Work in Progress: Last updated 11/27/06 7:58PM
Synopsis? One-time self-proclaimed "Next President of the United States" (The ONLY attempt at humor in this graphic lecture) portrays himself as a scientific expert by spewing statements like, "We all know...", "All scientists agree that...", "It is obvious that...", and "No one can argue that we are doing this to ourselves...". He falls short of claiming to have invented Global Warming in his spare time at Harvard, but other than that, there is no solid science, no scientific rebuttal, and an over-abundance of political bravado and blustering posturing. So, how do I really feel? This 'documentary' is actually a 'mockumentary'! I liked Gore till this! I voted for him, for cryin' out loud! TWICE! (Hey, my other brother, Daryl, had to vote, ya know...) However, this is such an anti-science, no evidence diatribe that I find myself wondering why a man who purports to have an IQ above 140 is stuck in such an intellectual black hole... 2008 posturing? Who am I to say? However, I have lots to say about the real SCIENCE involved!
- First, let's take a look at the movie poster.
This is an unmistakable correlation between man-made pollutants and the current cycle of vicious weather we are dealing with; intended or unintended, it's still a blatant attempt to correlate them. It's sorta a satellite image of Katrina, or some other hurricane, swirling from a smokestack! Or is that a Spiral Galaxy? Either way, I'm relatively confident smokestacks have nothing to do with hurricanes or galaxy formations. Well, my truth-seeking friends, there is NO CORRELATION AT ALL! According to a recent (11/29/05 ) NOAA (National Oceanic and Atmospheric Administration) report, "The nation is now wrapping up the 11th year of a new era of heightened Atlantic hurricane activity. This era has been unfolding in the Atlantic since 1995, and is expected to continue for the next decade or perhaps longer. NOAA attributes this increased activity to natural occurring cycles in tropical climate patterns near the equator. These cycles, called the tropical multi-decadal signal, typically last several decades (20 to 30 years or even longer). As a result, the North Atlantic experiences alternating decades long (20 to 30 year periods or even longer) of above normal or below normal hurricane seasons. NOAA research shows that the tropical multi-decadal signal is causing the increased Atlantic hurricane activity since 1995, and is not related to greenhouse warming." (http://www.magazine.noaa.gov/stories/mag184.htm). Hmmm. Where does Gore and his mindless followers get this notion? Can you say, "Media Frenzy"? This idea has been fueled by reporters who have no scientific literacy and just keep repeating each other's fallacies. sigh...
- To start a "documentary" with a statement like, "We are killing ourselves...", is not only ludicrous, but silly. This statement, however, does set the scientific tone for the next hour and 45 minutes; there is no science here. Every statement he utters is either wild speculation or a simple repeat of the popular beliefs the media has shoved down the masses throats. A few cases in point.
- Showing the often referenced and photographed Argentinian area of the Upsala Glacier (Image: Gary Braasch ©) where a portion of the glacier has obviously disappeared within the last 70 years, he fails to even mention why this happened or how it happened. He only says, "Here is scientific proof of global warming's devastating affects."
The Upsala Glacier and six other glaciers descend from the South Andean icefield into a lake, surprisingly called Upsala Lake. "I was astounded to discover that while the Upsala glacier had retreated rapidly, the other glaciers [that fed the lake] showed little movement, and one had advanced across the lake into the Magellan peninsula. If in the same area some glaciers advance and others retreat, the cause is clearly not global warming but local micro-conditions." (Dr. Swaminathan Aiyar, U of New Delhi, Global warming or global cooling?; The Times of India.) (http://timesofindia.indiatimes.com/articleshow/1034077.cms)
- Aside; In science, a proof is an almost impossible venture. The word has meaning in geometry and in civilian everyday life. However, in science, to prove something would take an eternity of 100% tests and no dead rats or monkeys or Freshmen.
- He constantly implies that there are no reputable scientists who dispute anything he says - sorta that people on the 50th floor of the Empire State Building had better learn to swim. However, there is wide disagreement about this AND whether humans are causing global warming (climate change preceded the invention of the Hummer, by the way...) and about whether we should be worried about the trends. Look carefully at Gore's charts and you'll see that the worst horrors take place in the future of his imagination. According to a 2004 Gallop survey of members of the American Meteorological Society and the American Geophysical Society (You know! The folks responsible for actually DOING the weather?) found that only 17% of them, all with advanced degrees, thought the warming during the 20th Century was the result of an increase in greenhouse emissions.
Meanwhile, a Times/ABC poll of 1000 blind phone calls to American citizens shows that 87% of them DO think we are causing it (Time Special Issue, "Be Afraid; Be Very Afraid"). Well, who ya gonna believe? Joe Sixpack or Dr. Mel and Hurricane Schwartz?
- Gore claims, with a glazed look, that unspecified measures can reduce emissions to pre-1970 levels. He assesses the tradeoff between the economy and the environment by displaying a cartoon, YES A CARTOON, of a scale with Earth on one side and bars of gold on the other. "OK, on one side we have gold bars," he says. "Mmm, mmm, don't they look good!" What they heck kind of mental lapse was he experiencing? I MUST go see this again just to see if I can catch the brain convulsions before he says it... Someone, please, let me know what that scene was all about...
- Gore, as well as the Kyoto proponents, claims that the US, alone, is the problem. Traveling virtually to China, he is oblivious to the amount of uncontrolled soot and dangerous gases being pumped into the air by China's coal-fired infrastructure. He does not meet with bronchitic citizens who wear surgical masks outdoors and pause to hawk up brown gunk every few minutes. Instead, he tells us America is lagging behind. "China," he says, "is on the cutting edge" of environmentalism. WHAT? Not according to every source I've been able to find! China is dumping ALL of it's burn-off (chemical crap by-products of coal burning) directly into the air at a staggering rate. Take a look at this NASA satellite image of Eastern China. ICKY!
Credit Provided by the SeaWiFS Project, NASA/Goddard Space Flight Center, and ORBIMAGE Even according to Gore's backers, all those GreenPeas folks, cry about the problems in China. CBS News reported (YINCHAUN, China, March 31, 2000):
(CBS) In this CBS News World WeatherWatch report Correspondent Barry Petersen tells us why when China smokes, you might get a cough. It is easy to see the pollution problem in an industrial city like Yinchuan in northwestern China but it is hard to realize this is typical across the world's most populated country. The culprit is sulfur dioxide from coal, which is burned for everything from making electricity to cooking dinner. China produces twice the sulfur dioxide as America does, and by some estimates China may one day generate five times more than what we see today. That's why just breathing is making Dr. Jiang's patients sick. He knows of only one cure, and it's not medicine. The best cure is to leave for the countryside, he says. "And these things...are coming from manmade sources in China, and laced in those materials are things like arsenic, lead and zinc," Cahill says. China's far-reaching dust and soot cloud traveling to the West Coast hits Hawaii first...
- I was taken aback a little when he compared himself to Churchill. I knew Churchill. Churchill was a friend of mine. Mr. Gore, you are no Churchill! (Well, I really didn't know Churchill, but the analogy seemed funny to me...) The final scene is of Gore bravely silhouetted against the cosmos, a lone figure tenderly surveying his domain. The job he really wants, no recount can give him.
 John Darkow, Columbia Daily Tribune, Missouri
This is just a beginning review. I'll be back soon to complete this initial review after I have time to consult with a few of my science-type colleagues and have time to stop the overwhelming urge to puke. In the meanwhile, you can visit a more detailed PowerPoint presentation I'm preparing on the Global Swarming topic overall at Gore-Bull Warming; Fact, Fiction, & Myth. Or you can view a less interactive PDF version here. Please, keep in mind, the PPT is a work in progress also! If I don't have all the proper references, I WILL! Contact me if you want to argue or can aid in this educational endeavor.
Can You Prove This Without Trigonometry?
Sunday 08-03-2008 6:12am MT
A litle trigonometry is OK, like using (sinx)^2 + (cosx)^2 = 1
This came up in a calculus class I was teaching.
First prize: Two tickets to "Mama Mia" Second Prize : Four tickets to "Mama Mia" Just kidding...no tickets. You reward is "bragging rights" to a rather difficult problem.
Prove: tan[(PI/4) +(x/2)] = SQRT[(1+sinx)/(1-sinx)]
Have fun!
I will accept a trig proof, but it is not what I really want here.
KUDOS to John and Pat Anderson for a great solution to this one!!!!
They "saw" that both of these expressions are valid results from integration of secant(x). Neither is the "famous" ln|sec(x) + tan(x)|, but that was the whole point.
Excellent work, guys.
Truth in Science by Democratic vote!!
Sunday 07-13-2008 7:06am MT
This morning (July 13, 2008) I am discussing that a "fact" or "truth" is what people say it is and little else. Here on Yahoo!Answers (until the end of the show) people are voting on my answer to a question (which is physically correct) and three other misconceptions about this "Melting iceberg issue"...
The question is NOT "Will the ocean rise enough to flood any land?" it was "Wat will happen from a scientific point of view?"
Here is the link: Please VOTE...
http://answers.yahoo.com/question/index;_ylt=AiCjKKjz5aBMiVrDAy5uxivty6IX;_ylv=3?qid=20080710154832AA27JQo&show=7#profile-info-mTfZUeZOaa
My answer is signed "-Fred" and is the only correct analysis.
If you need to "see" it:
 |  | Figure 1: A freshwater ice cube floats in a beaker of concentrated saltwater. Note that the ice cube floats much higher in the saltwater than it would in a glass of freshwater because saltwater has a greater density.
| Figure 2: When the freshwater ice melts, it raises the water level. Freshwater is not as dense as saltwater; so the floating ice cube displaced less volume than it contributed once it melted. |
Professor Noerdlinger has written extensively about this and Professor Kay R. Brower, of the New Mexico Institute of Technology, Socorro, validated the effect experimentally as seen in Figures 1 and 2. For more information, contact: Peter D. Noerdlinger St. Mary’s University Department of Astronomy and Physics Halifax, N.S., B3H 3C3 Canada
This is an experiment that I have my students perform so that they can confront their pre-conceived notions about physics.
Please vote on the question.
By the way, the asker is NOT a HOLY MAN...that is just his "character" or avatar on this "gaming" site. I believe that "Mullah" is a college "kid", but he is a fine physicist! Take a look at the questions he asks.
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