Board Definition and 282 Threads

Question :A diver springs upward from a board ...Need help I am stumped as to how to go about answering this question...A diver springs upward from a board that is three meters above the water. At the instant she contacts the water her speed is 8.90 m/s and her body makes an angle of 73.0° with...

I am not a chess player. I wonder if it would be possible for someone to give me a valid board configuration where one colour (preferably white) has lost several pieces more than the other and is now in check.

The anti-science school board took some pretty nasty hits from last night's primaries. Pro-science incumbent Janet Waugh kept her seat, while Connie Morris and Iris Van Meter's replacement (son-in-law Brad Patzer) were both eliminated. 2 anti-science board members did make it to the November...

Hello everyone. I have now finished my tetris program, and was planning on starting on a chess game in the console (it will be 2 player, playing at the same terminal - no winsock at the moment). Anyway, I have already set up the basics, however, I need a little help in programming the board. I...

I don't think this has been posted here before : http://redwing.hutman.net/%7Emreed/index.htm Basically caricatures of types of message board posters. For example, there is a type that basically describes the PF sisterhood http://redwing.hutman.net/%7Emreed/warriorshtm/cybersisters.htm...

The board sandwiched between two other boards weighs 95.5 N. If the coefficient of friction between the boards is .663, what must be the magnitude of the comrssion forces (assume horizontal acting on both sides of the center board to keep it from slipping? I have no idea how to do this...

but it doesn't really matter because the board has no authority! http://sfgate.com/cgi-bin/article.cgi?f=/c/a/2006/06/01/BAGLFJ5MCT1.DTL

Anyone ever do this? I am currently working on a project to paint a Chess/Checker Board onto my desk, but I am looking for some ideas on how to paint the actual pattern for the board. I have already sanded down the area of the desk, and am going to paint a 17" square area white (.5" boarder...

:mad: We had a lab report that was due last week and was rather lengthy. So I worked through the problems together with my friend. We had to turn in individual lab reports. Apparently the TA thought they were too "simliar" and showed it to the professor. Now I got a letter in the mail from the...

:cool: Hey ya'll, I was wondering, if there anyone has discussed topics dealing with nanotechnology. For instance, what are the latests developments, how far has the cutting edge advanced, aside from sensors is there reasearchlooking into programable nanobots, what sorts of materials...

A uniform board is leaning against a smooth vertical wall. The board is at an angle above the horizontal ground. The coefficient of static friction between the ground and the lower end of the board is 0.350. Find the smallest value for the angle , such that the lower end of the board does not...

Foundational Questions fq(x) Smolin and Wilczek on board http://www.fqxi.org/who.html Lee Smolin and Frank Wilczek are on the scientific advisory board of a new foundation, agency, research mission, project---not too sure what it is yet. Thanks to Peter Woit for alerting us to the...

A lead ball is dropped into a lake from a diving board 5.00 m above the water. After entering the water, it sinks to the bottom with a constant velocity equal to the velocity with which it hit the water. The ball reaches the bottom 4.60 s after it is released. how deep is lake?

Because besides Evo's statue in Sweden, none of you have your own tower in another nation :smile: :smile:

I'm considering getting a board for use in problem solving here at home. I am trying to decide between the traditional chalk and the modern white board. A few considerations: health impact dust/marker; messiness; viewability; cost. If you have anything else to add, please do. Sean

A diving board of length L = 3.00 m is supported at a point a distance 1.00 m from the end, and a diver weighing 490 N stands at the free end. The diving board is of uniform cross section and weighs 295 N. Find the force at the support point. ** Now I know net torque = 0 Suppose F1 is the...

It's just that it helps to understand what I'm doing. 4. [HRW6 7.PN.04.] The block in Fig. 7-10a lies on a horizontal frictionless surface and is attached to the free end of the spring, with a spring constant of 65 N/m. Initially, the spring is at its relaxed length and the block is...

"When my colleagues saw a CAT scan of the new fossil, they tore up their family tree diagrams and said, 'Back to the drawing board!' ... We never suspected such a creature existed," said paleontologist Robert Bakker. URL: http://www.msnbc.msn.com/id/7702738/

the question: a board 2 ft long with weight 50 lb is pressed against a wall. what force, applied at 30 degrees, should be applied to keep it horizontal? i'm not sure how to go about this, so i started by converting the weight of 50 lb to 22.67 kg, then getting a force of mass at 2.31 N then...

Hello Just wanted to know is there anyone on this board preparing for IIT(Indian Institute Of technology) or of it. I know one or two but are there more. Anyway and for other competetive exams around the globe. Bye

A diving board oscillates with simple harmonic motion of frequency 3.6 cycles per second. What is the maximum amplitude with which the end of the board can vibrate in order that a pebble placed there will not lose contact with the board during the oscillation?

Everyone will appreciate that a Chess board consists of 64 squares. The board is eight squares by eight squares. A puzzle may be made by cutting the board into pieces , along the boundary of the squares, and then attempting to reassemble the pieces back into the original 8 x 8 square shape...

http://www.ncseweb.org/resources/news/2004/PA/39_a_dubious_first_for_intellige_10_21_2004.asp

Cassini has been flying around our solar system since 1997 and it still has years of flying to go. how much fuel does it have on board (or did have when it first set off) it can't be burning fuel all the time surely, it must use momentum for long journeys.

has anyone here tried this?...i've don't it in grade 5, and some kid was doing it and he was , i guess "acting cool" and he pissed "it" off and it said it would kill him that night, and everyone in the class told him to apoligize and he did and the "spirit" said it wouldent hurt him...

Hey, I am in the process of redoing a History Day board for the state competition. Of coarse, I did mine on physics. I have a problem though. I'm stuck on 2 things. 1) A real life implication of something to do with Relativity (special of general). 2) Another picture I could put for...

Who in here are physicists? To those who are:Do you have a doctor degree? Do you work in a science institution or as tutors somewhere?

I'm retaking both physics AS exams this Janurary, I managed to get a D in the summer exams and the main reason was not having a clue what to do for section C, the model answers. I had no problem with the exams it themselves, infact I got an A in AS mathematics so they shouldn't pose a problem to...

Help! (Repost from Chemistry board) So far I have done 14 out of 15 questions on the LAST problem set of the semester. I am stuck on one question, and no matter what I try, it won't accept my answer (the problem set is electronic). Here is the problem: "A galvanic cell consists of a...

Problem 19. given: g=9.81 m/s^2. A 52.2 kg driver steps off a diving board and drops straight down into the water. The water provides an average net force of resistance of 1518 N to the diver's fall. If the diver comes to rest 5.2 m below the water's surface, what is the total distance...

General Relativity has been the main theme running through the discussions I enjoyed in the previous PF version. Cosmology issues, removal of the big bang singularity (loop quantum cosmology LQC), dark energy (cosmological constant), the limits of the observable universe, the CMB, redshift...

Hi all, I found this problem in a Martin Gardner book. You have a chess board of n x n squares. How many moves m(n) can a chess knight make on this board without crossing or touching its own path? m(0) = 0 m(1) = 0 m(2) = 0 m(3) = 2 m(4) = 5 m(5) = 10 m(6) = 17 m(7) = 24 m(8) = 35...