Tree Definition and 290 Threads

As the title states.

Homework Statement a tall tree and a short tree of the same mass density and width are cut at the base at the same time. why does the small tree hit the ground first? Homework Equations none. its a word problem The Attempt at a Solution gravity id pushing in different ways?

I know the seeds are mildly poisonous, but what about the leaves? What about the leaves of other trees like, orange trees, plum trees, maple trees, ground banana tree leaves, etc? If the bark of a tree is edible, does that imply that it's leaves, seeds, and sap are edible as well? Vice versa...

I am trying to work out the time taken for a tree that has been cut at its base to fall flat to the ground. More detailed picture here ...http://i.imgur.com/RYS3D.png" The tree is not experiencing wind resistance, and is pivoting from the centre of the trees base. the tree also starts at zero...

[url]g4ph-h7l_aM[/youtube] This is pretty old but it just crossed my mind. Wanted to share it with you guys. One question though, why is that current arc going upwards? And why did it appear at all? Can we discuss this effect?

Homework Statement While exploring the canopy of the rainforest in equatorial South America, Anastasia falls from a branch 39.0 meters high. Exactly 0.8 seconds later Joe falls from the same branch. How high above the ground is Joe when Anastasia splats into the mud below? (the mud is very...

Homework Statement For calc 2 we have to write a formula using integration that will find the volume of any tree log that is cut. Using the picture that is attacked I came up with this equation. The integral from 0 to h of pi*(((R-r/h)x+r))^2)dx. Any ideas about my formula or anything would...

hi can anyone help my whit this questions :confused: Q1: Harry is an amateur birdwatcher who goes birdwatching in a region in which he knows there are only two species of thornbill – the buff-rumped thornbill and the yellow-rumped thornbill. Harry has some difficulty in differentiating...

In its excited, and ever more inebriated hunt after fermented apples, this Swedish moose finally came to rest within the branches of a particularly inviting tree. Helped out, it fell into a stupor for some time, but then got up and staggered back home into the woods...

the image of a tree just covers the length of a plane mirror 4.3 cm tall when the mirror is held 32 cm from the eye. The tree is 28 m from the mirror. What is the height of the tree? so I set up a ratio .043/.32=(28-.32)/h and solved for h and got 205 meters, but I am not sure if...

Homework Statement Suppose that the four inspectors at a film factory are supposed to stamp the expiration date on each package of film at the end of the assembly line. John, who stamps 20% of the packages, fails to stamp the expiration date once in every 200 packages; Tom, who stamps 60% of...

Howdy from the tornado ravaged state of Alabama. We've been going out with chainsaws for days on end trying to help anyone we can. This guy wants to get this tree down so his grand children won't get hurt. What is the safest way to do this? I only have about 10 hours to figure it out. I'm...

Hello. I am attempting to render the bifurcation diagram of the logistic difference equation in C with OpenGL. I think the math behind it is simple enough, but for some reason I am ending up with a structure that resembles the tree but doesn't look quite like it. I would really appreciate it if...

Homework Statement see attachments. Homework Equations what is the height of the tree? The Attempt at a Solution It seems that tan45=h/22 h=22*tan45 h=22m

I need a solution for healing tree grafts. Fruit trees are often propagated in the spring by grafting (attaching) a piece of scion wood to rootstock. The graft must "heal" which means that the outer "cambium" layers of the two pieces join together. This process occurs around room temperature...

A school phone tree has 1 person responsible for contacting 3 people. If there are 1500 students in the school, how many levels will there be on the phone tree (assuming 1 person is at the top of the tree)? My Solution: This question forms a geometric series: A(first term)=1 R(common...

A tree trunk is approximated by a circular cylinder of height 50 meters and diameter 4 meters. The tree is growing taller at a rate of 4 meters per year and the diameter is increasing at a rate of 5 cm per year. The density of the wood is 4000 Kg per cubic meter. How quickly is the mass of the...

When do you plan on taking it down?:biggrin:

Homework Statement A tree is cut with a 45 degree wedge to the center of the tree. The height from the base of the wedge to the top of the tree is 50 feet. The weight of the wood from the base of the wedge to the top of the tree is 500kg. Assuming there is no resistance when the tree starts...

Homework Statement A tall tree and a short tree (both having the same width and mass density) are cut at the base at the same time, and begin tipping over. Which tree hits the ground first? The Attempt at a Solution I think they hit at the same time because gravity pulls on both...

ok so what am i doing wrong here? this was the only question i missed on my exam, and its driving me crazy...

Homework Statement While exploring the canopy of the rainforest in equatorial South America, Anastasia falls from a branch 50.0 meters high. Exactly 1.1 seconds later Joe falls from the same branch. How high above the ground is Joe when Anastasia splats into the mud below?Homework Equations...

Homework Statement A car traveling at 25m/s strikes a tree. The front end of the car compresses and the driver comes to rest after traveling 0.72 m. What was the average acceleration of the driver during the collision? Express the answer in terms of "g's," where 1.00g = 9.80 m/s2...

If it is claimed that with liquid water, life will probably form, why then would there be only one tree of life on Earth where all life started ? Why is there not a forest of trees, if the conditions are favourable ? Or is it the case there there were possibly more than one and they...

I've had some arguments after I assumed ( perhaps wrongly) that electric fields were responsible for the direction that branches grow in. In any case my inquires on this all result in the same answers. That the direction of growth is determined by light and gravity. Do all you agree with...

Homework Statement The complement of T' of a tree T with n vertices has [(n-1)(n-2)]/2 edges, for all integers n greater than or equal to 2. Homework Equations Must prove using induction and using Lemma 18.2 which states "any tree that has more than one vertex has at least one vertex of...

Sorry if this is the wrong section (already posted it in the biology forum and got no response) but this question comes from a convo I had with some friends the other night.. Say you were able to grow a full size tree indoors (assuming you had the space, nessesary lighting, soil, etc..) and...

Sorry if this is the wrong section but this question comes from a convo I had with some friends the other night.. Say you were able to grow a full size tree indoors (assuming you had the space, nessesary lighting, soil, etc..) and kept it under 18 hours of light and 6 hours of dark...

So I'm creating a very basic fractal tree function in matlab. The function is supposed to create a fractal tree where each branch comes out at 90 degrees so it looks like a bunch of T's just put together. Currentley I am running into the problem where I can not get the branches to plot in the...

Imagine there is a game and a gambler has a prob. of P1 in winning one unit of capital in a trial and 1 - P1 in lossing one unit. He wants to know the prob. of HAVING EVER lost more than or equal to a threshold no. of units (drawdown threshold) at or before the end of a number of trials...

Hi, would you mind helping me in solving this problem? Because I stuck now. The problem is to print a space in a binary tree (not binary search tree) my current program can only output without appropriate spacing so if input is : 4 7 8 9 2 0 3 1 5 the output will become 4 7 8 9 2 0 3 1...

1. The driver of a truck slams on the brakes when he sees a tree blocking the road. The truck slows down uniformly with an acceleration of -5.60 m/s2 for 4.20s making skid marks 62.4m long that end at the tree. With what speed does the truck strike the tree? Homework Equations I'm guessing that...

Homework Statement - ball is thrown with a horizontal velocity of 18 m/s directly toward a tree - person who threw the ball is 1.5 m above the ground and 9 m away from the tree looking for time it takes to hit the tree, what height the ball hits the tree at, and the balls velocity when it...

So a car hits a tree. F=ma So let's say it was driving at 90 km/h = 25 m/s, and after the crash let's say its speed was 0 m/s. a=v-v0/t But how could I calculate the t? This is not a homework question. Thanks in advance, fawk3s

Homework Statement Draw a tree diagram to illustrate the possible travel itineraries for Pietro if he can travel from home to Ottawa by bus, car, or train, and then from Ottawa to Orlando by bus, train, or plane. The Attempt at a Solution /bus bus -train \plane...

I'm not really a bad student, but I just can't come up with an answer for this question: "You are driving along the highway and encounter an unavoidable situation. You must hit either an identical car moving toward you at the same velocity, or a large tree. Which do you choose?" Obviously, I...

Homework Statement A gibbon, hanging onto a horizontal tree branch with one arm, swings with a small amplitude. The gibbon's center of mass is 0.410 m from the branch and its rotational inertia divided by its mass is I/m = 0.289 m2. Estimate the frequency of oscillation. Homework...

I'm trying to put an end this age old question, but I want to translate it into form of an equation. SOME SAY: No, because "sound" is ears interpretation of those waves. I SAY: Yes, because it makes a "sound" (as defined by the vibrations). I'm going by textbook definition. It makes sound...

Homework Statement While sitting on a tree branch 10.0 m above the ground, you drop a chesnut. When the chestnut has fallen 2.5 m, you throw a second one straight down. What initial speed must you give the 2nd chestnut if they are both to reach the ground at the same time? Other variables...

2 questions that came up in a past paper. A binary tree which is both full and complete and has h levels contains a total of 2^(h-1) leaf nodes. Prove that this is the case for all h > 0. Show that with h levels the number of internal nodes is 2^(h−1) − 1 proof by induction apparently...

A partridge of mass 5.05 kg is suspended from a pear tree by an ideal spring of negligible mass. When the partridge is pulled down 0.100 m below its equilibrium position and released, it vibrates with a period of 4.15 s. i figured out the first three parts, but part four has me stuck. What...

Hi everybody! I'm a new Physics Forums user and hope someone could help me out with my minor dilemma. I'm a PhD student in mathematical/theoretical physics and I' working on the Boltzmann equation in QFT. Up to now, there was no major emphasis on Feynamn diagrams - the approach was rather more...

Homework Statement Show the semantic tree of: \neg ( ( p_0 \rightarrow p_1 ) \rightarrow \neg ( p_1 \rightarrow p_2 ) ) Homework Equations \neg ( ( p_0 \rightarrow p_1 ) \rightarrow \neg ( p_1 \rightarrow p_2 ) ) The Attempt at a Solution I cannot understand its purpose...

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Hi everyone, i have a binary search tree proble, please help me.. * Find record with key x in the tree. If not found, return the two nearest records in the tree (in alphabetical order) * Return values: * FOUND: Return the address of the node in the tree which contains key x, set n1 =...

Homework Statement Please can someone help me with this question, I am really stuck. I have drawn a tree diagram but I don't think it is correct, as it does not give the right answer. Can someone have a look at it and show me were I have gone wrong? Or show me what the tree diagram should...

Homework Statement I am working on an assignment in which I have to add a method to my BST class which checks if a binary tree object is in fact a Binary Search tree. So (1) A left child must be smaller than the parent (2) A right child must be larger than the...

and no one is around to hear it does it make a sound?... my real question is, does the tree even exist if no one is around? and what qualifies an "observer". do wave functions collapse only in the presence of humans? why can't schroedinger's cat tell if it is dead? I guess I'm asking...

Hi, I'm familiar with tree traversal alogirthms, post,pre and in-order. If you give me a tree I can print out the specified traversal of that tree. However, one thing I can't do is build a tree from a given output. For example, on my last test, my prof gave me this Question: A pre-order of a...

Homework Statement Three forces are applied to a tree sapling, as shown in the figure, to stabilize it. If vector F A = 380 N and vector F B = 260 N, find vector F C in magnitude and direction. http://www.webassign.net/gianpse4/12-45.gif Homework Equations The Attempt at a...