Tree Definition and 290 Threads

  1. T

    Java Binary Tree java help please, with getRight and getLeft subtree.

    I can't figure out how to get these 2 methods to work. In my assignment description it says public BinTree getLTree() Get a reference to the left subtree. If this is not possible to do then throw an IllegalArgumentException. NOTE This routine returns a BinTree, not a Tnode. You...
  2. M

    Drag Race Christmas Tree Design

    1. Homework Statement Question Details: A "Christmas Tree lighting system is used to start a drag race. The inputs to the system include a start button, a reset button, and two start line sensors. The outputs include lines for Red, Yellow, and Green lights and two Fault lights. When the...
  3. J

    Calculating Rope Strain for 90' Tree Cut

    I have to cut a tree down that is 90' tall and weighs 12000 lbs. It is leaning 10 deg from vertical away from the direction of pull. My rope is tied at 50' up on the tree and the angle from horiz for the pull rope is 15 deg. I would like to how much strain will be on the rope as I cut the tree...
  4. J

    Pick A Better National Tree Than US Oak

    There are a lot of different kinds of trees in the US that we haven't driven to extinction yet. The Oak, one of these uneradicateable weeds, has been designated by act of Congress as the National Tree of the US. This is a wise choice in my opinion. My living room floor is covered with a...
  5. T

    Where can i find binary tree recursion manual

    where can i find a tutorial on binary tree recursion i searched in google: http://www.google.co.il/search?hl=iw&sa=X&oi=spell&resnum=0&ct=result&cd=1&q=binary+tree+recursion&spell=1 and there is no tutorials for this kind of stuff ??
  6. N

    Why is My Potted Christmas Tree Drying Out and Losing Needles?

    I have a potted tree that I bought last year, it was to be my Christmas tree for many years to come. Unfortunately it seems to be drying and the needles are falling off. Is this because it is root bound? Not getting enough water (I doubt this one)? Too much water? Not enough fertilizer...
  7. K

    Calculating Magnification of Christmas Tree Ornament

    Homework Statement A spherical Christmas tree ornament is 4.76 cm in diameter. What is the magnification of the image of an object placed 11.9 cm away from the ornament? Homework Equations f = .5* r (1/di) + (1/do) = 1/f m=-(di/do) The Attempt at a Solution f = .5*2.38 =...
  8. K

    What are the key decisions that shape our lives and how can we analyze them?

    Say you map out the entire decision tree of an individuals life starting from birth. Each node has N branches, where N is very large, and delta t approaching zero. Let's keep it finite density because we want some results. Now you trace out the individuals realized path outcome amongst...
  9. L

    Oldest Living Tree: National Geographic

    Just thought this was interesting... http://news.nationalgeographic.com/news/2008/04/080414-oldest-tree.html
  10. T

    Changing a tree into a list question

    i got a BST tree each node builded like this: typedef struct node node; struct node { int value; node *left,* right,*next; }; i need to change it into a sorted linked list from the smallest to the biggest. i can't use malloc and i can't change the anything in this tree i...
  11. D

    Distance cut in half infinitely (shooting an arrow at tree)

    (I looked for a Stupid Question section but couldn't find one anywhere - I apologize if this is the wrong section for this question.) If you shoot an arrow at a tree, the arrow will eventually travel half the distance between your bow and the tree. From that point, you could go on infinitely...
  12. ZapperZ

    VOTE Photo Contest - The Tree Of Life

    This promises to be a difficult contest to vote on since there are so many wonderful pictures. Still, please pick the picture that best represents our theme, which is on trees. Note that the participants were asked to submit a photo that has the tree/s as THE main subject, and not the scenery...
  13. A

    Is a Full Binary Tree's Internal Path Length Equal to Its External Path Length?

    The internal path length of a full binary tree is the sum, taken over all internal nodes of the tree, of the depth of each node. Likewise, the external path length is the sum, taken over all leaves of the tree, of the depth of each leaf. Consider a full binary tree with n internal nodes...
  14. ZapperZ

    PF PHOTO CONTEST - The Tree Of Life (9/13-9/19)

    [FONT="Comic Sans MS"][SIZE="5"]The Tree Of Life This one should be easy. Pictures this week must be on trees. Trees (or a tree) must be the main subject of your picture, not the background scenery, the people in front of it, or anything else. Please note that fake trees do not qualify...
  15. Y

    Binary Tree Algorithms: Generating Random Trees

    Does anybody know where i can get info on generating random binary trees? I've been checking a lot of publications and have come across the yule process and uniform method. The trees they are being applied to, however, are speciation trees and most of the stuff is incomprehensible to me. Can...
  16. D

    Collision of bullet with mass hung from tree

    a wooden tree trunk with A mass M=9.98kg is hung from a tree by a cord who's mass is irrelevant, it is hit by a bullet with a mass of m=0.02kg and is traveling at v1=500m/s. the bullet hits the trunk and immediately gets stuck in it, what is the maximum height that the trunk and the bullet in it...
  17. L

    Can Software Automatically Create Tree Diagrams from Research Paper References?

    Hello everyone! Quick question, anyone know of any computer codes that will take in a long list of block data linked to other lists of block data and will create tree diagrams? My specific problem is for documents (research papers) that reference other papers and so on. If not, should I...
  18. H

    What are some recommended tree visualization software options?

    Any suggestions for good tree visualization software? I'm thinking something along the likes of Treemap. Thanks!
  19. russ_watters

    Do Tree-Huggers Really Fling Poo?

    No, this quote is not about monkeys, it is about tree-huggers. Really. If you don't believe me, read the article! http://www.usatoday.com/news/nation/2008-06-28-tree-sitters-standoff_N.htm
  20. D

    Delete operation on binary search tree

    The following diagram is from the section in my notes titled "Operations on Binary Search Trees". Specifically it explains via pseudocode how to implement a delete function for a BST: http://img410.imageshack.us/img410/4225/deletetreexz0.jpg What I don't understand in the 2nd box is why...
  21. L

    Explore the Tree of Life to All Species

    I was wondering if there was any resource out there that had a complete tree of life for all the species.
  22. L

    Solving 3-1 Trees: Proving Even # of Vertices & Finding Leaf #s

    please help solve tree problem... A tree is called a 3-1 tree if every vertex in the tress has degree equal to either 3 or 1. 1. Draw all 3-1 trees with four or fewer vertices of degree 3. 2. Prove that a 3-1 tree must have an even number of vertices. 3. Find a formula for the number of...
  23. C

    Finding the Ratio of Angles of Tree A & B

    Homework Statement Tree A is 10 m tall. Tree B is 60 m tall. You're standing on level ground at a position that is 25 m from tree A and 75 m from tree B. You're eye height is 1.5 m above the ground. Find the ratio of theta B/ theta A, of the angles (measured from the horizontal) at which you...
  24. C

    With what speed does the car then strike the tree?

    Homework Statement THe driver of a car slams on the brakes when he sees a tree blocking the road. The car slows uniformly with acceleration 5.10m/s^2 for 4.40s, making straight skid marks 64.6 m long ending at the tree. With what speed does the car then strike the tree? Homework Equations...
  25. S

    Constructing a binary tree from inorder and postorder traversals

    Homework Statement Construct the tree from the following traversals Preorder: EXAMFUN Inorder: MAFXUEN The Attempt at a Solution E / \ X N...
  26. T

    Java How to Calculate Leaf Node Difference in a Binary Tree Using Recursion?

    there is a given binary tree each of member are of a Node type class Node { int info; Node left; Node right; } in the info part of each node we have a number. in each one of his leaves we have some number and in each one of its roots (crossroads) we have zeros. my gole is to...
  27. B

    Is There a User-Friendly Program for Creating Truth Trees?

    I'm looking for a simple program that will create truth trees for me. You see graphics like this (http://upload.wikimedia.org/wikipedia/en/thumb/a/ad/Partially_built_tableau.svg/200px-Partially_built_tableau.svg.png) all the time, but I can't believe anybody would be fiddling around on MS Paint...
  28. F

    Calculating Impact Force and oil well tree

    I was wondering if anybody could help me. I need to calculate the impact force exerted on an rov if it collides with a oil well tree. The information I have are the mass of the rov = 500 kg, initial velocity othe rov is 1.5 m/s and the oil well tree is a fixed body. I am unsure how to calculate...
  29. H

    C/C++ Code : Binary Search Tree C++

    #include <iostream.h> #include <conio.h> #include <stdio.h> void main() { struct znode // binary search tree node { int data; // data type is integer struct znode * left; // left subtree struct...
  30. N

    Maple Growing a Maple Tree From Seeds

    Anyone have any advice on starting/growing sugar maples from seeds? I bought some seeds a little while ago, and followed the directions on the package, but they never sprouted. The package said to put them in the fridge for a few months, then plant them. I did that with no luck, so I was...
  31. wolram

    Half Man Half Tree: Discovery Documentary

    Just watched this on discovery, the guy had a weak immune system which allowed massive wart growths on his hands and feet. Another was the man with no face, he had tumours bigger than his head on his face worth watching but horrible.
  32. K

    How Can I Efficiently Build a Huffman Tree for Huffman Encoding?

    Hi I'm playing around with Huffman encoding and am having a major problem getting my head around how to efficiently build the tree. I Googled "huffman coding" and have a basic grasp of what needs to be done but the actual process of walking through a list of sorted values has turned into a big...
  33. F

    Can Electric Eels Power Our Christmas Trees?

    check it out: http://www.russiatoday.ru/features/news/18499/video http://www.russiatoday.ru/news/news/18499
  34. Math Is Hard

    Nailing Jello to a Tree: Uncovering Solutions

    It's been said that this is impossible, but there must be a handful of legitimate solutions. I'm writing an essay about solving a challenging problem and I am thinking about using this as a lead in, offering a few strategies for a solution. Any ideas? Freezing the Jello seems like it might...
  35. G

    Is It Possible for a Human to Turn Into a Tree?

    Man slowly turning into a "tree" I hope you have a strong stomach for this one Watch the videos. http://www.telegraph.co.uk/news/main.jhtml?xml=/news/2007/11/12/wtree112.xml I feel bad for that guy for being cursed for life.
  36. T

    What is the torque on the tree from the truck?

    (APPLIED TORQUE) help! Homework Statement ok, I've spent a good amount of time on this bastard and can't get it, help.. Man ties one end of rope 8.00m long to bumper of his truck, which is 0.5m from ground, and the other end to a vertical tree trunk at a height of 3.00m. He uses truck...
  37. A

    Simple harmonic motion of ornament on tree

    Homework Statement A holiday ornament in the shape of a hollow sphere with mass 2.0×10−2 kg and radius 5.5×10−2 m is hung from a tree limb by a small loop of wire attached to the surface of the sphere. If the ornament is displaced a small distance and released, it swings back and forth as a...
  38. W

    Graphmatica and equations for a christmas tree

    Hey does anyone know how to use graphmatica. I need to create equations to make a christmas tree.
  39. J

    Calculating Tension: Child on a Swing with a 6.28m Rope | Find Tension in N

    Homework Statement A 30.8 kg child swings on a rope with a length of 6.28 m that is hanging from a tree. At the bottom of the swing, the child is moving at a speed of 4.2 m/s. What is the tension in the rope? ______ N Homework Equations ? The Attempt at a Solution I know you...
  40. B

    Forces Problem Involving A Tree Branch acting as a monkey's pulley

    Homework Statement A 10 kg monkey climbs up a massless rope that runs over a frictionless tree limb and back down to a 15 kg package on the ground. (a) What is the magnitude of the least acceleration the monkey must have if it is to lift the package off the ground? If, after the package has...
  41. S

    Understanding Tree and Potato Mass

    I learned in Ap Bio that a tree's mass comes from carbon.It makes sense, but is it the whole tree or just the trunk of the tree? Cuz I took a Practice Ap test and there involved a question with a piece of potatoe in Water. At first I assumed that it was diffusion or osmosis that occurred but it...
  42. A

    Deriving classical potentials from tree diagrams

    I'm looking for a good book for graduate students that indicates how one can obtain a (classical) potential from a tree-level Feynman process. For example, how can one go from the S-matrix of e.g. Compton scattering and derive the Coulomb potential. Any help would be appreciated.
  43. wolram

    The Fascinating Evil-Looking Tree

    The evil looking tree in movies, ok it needs some imagination to see the evil shape, if i use my imagination, i have a tree that looks like a rampant pterodactyl and looks quite ferocious, when the wind blows it is fascinating to watch as it seems to come alive.
  44. J

    Chemical Composition of Slippery Elm Tree Slime

    I was wondering what the chemical composition of the slime from the slippery elm tree (Ulmus rubra) is.
  45. L

    DNA family tree: who is the grandmother, mother, and daughter?

    Homework Statement By running a DNA blast, we need to identify who is the grandmother, mother, and daughter. And how/why do we know their relationship. The tree is attached. Homework Equations Here are some of the results from blast, I'm not sure if they will help: Group 1...
  46. T

    Design a tree support system for windstorms

    I have a project, i don't know if someone has done it, but i just can't conceptualized the whole system..i am to design a tree support system for windstorms, does someone has an idea on how it supposed to look like...im thinking of putting an anchor, like guyed wired on it.. i was thnking that...
  47. E

    What is the volume of this tree using integral?

    Homework Statement The circumference of a tree at different heights above the ground is given in the table below. Assume that all horizontal cross-sections of the tree are circles. \begin{array}{cccccccc}\text{Height} & 0 & 20 & 40 & 60 & 80 & 100 & 120 \\ \text{Circumference} & 31 & 28 &...
  48. E

    What is the volume of this tree using integral?

    The circumference of a tree at different heights above the ground is given in the table below. Assume that all horizontal cross-sections of the tree are circles. Estimate the volume of the tree. (Measurements are in inches.) \begin{array}{cccccccc}\text{Height} & 0 & 20 & 40 & 60 & 80 & 100 &...
  49. B

    Solving a Postfix Expression: ABCD+*/E- Tree

    Homework Statement I am having a hard time figuring out this postfix expression and turning it into a binary tree: ABCD+*/E- The Attempt at a Solution what's confusing me is the left side of the tree - the ABCD - I know the right side of the tree would look like this: - is the root...
  50. ZapperZ

    VOTE Photo Contest - O' Christmas Tree, O' Christmas Tree

    It was a smaller number of entries than I anticipated for this time of the year (I thought there were a lot of Christmas trees around). Still, it wasn't lacking in quality and "interest", especially with that deer head that wasn't even part of the tree! :) Please vote for the picture that...
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