Tower Definition and 177 Threads

I saw a YouTube video presenting what seemed like a clever solution to ##x^{x^{x^{.^{.}}}} = 2## (which is to say: an infinite tower of exponents of x = 2). He said to consider just the exponents and ignore the base and realize that those exponents themselves become a restatement of the whole...

Hello :) I was assigned a project yesterday and have been struggling with it trying to find my perfect measurements... I have to create a tower out of paper that would support a textbook My materials are paper and glue. My paper may be as long as I want but no wider than 1 inch, I currently have...

Dear PF Forum, Do anybody know the algorithm for 4 pegs Hanoi Tower? In regular initial, we can use array. But what if the initial configuration is random? I can do it in 3 pegs, but I've been searching algorithm for 4 pegs every day, on my bed, before I go to sleep. But I can't find any. The...

solar updraft tower: How small a working unit can be made? My reason to ask this question is: I think that if a commercial unit is ever to be built, first the concept must be widely established. One or two working examples of a size similar to the prototype built in Spain won't likely prove...

Homework Statement The beam ABC is1000LBs and its center of mass is given as 6.5ft to right of B. B is a pin joint. A & D are frictionless rollers. Find tension in cable.Homework Equations Call the tension in the cable T. Trig shows us that the left-hand triangle is 45 degrees at ABD and the...

Hello, I could use some help determining what size hydraulic cylinder I need to be able to tilt my turbine tower up. What I have is a 70 ft tower where the first 20 feet weigh 2500 lbs, the 2nd 20 weigh 1700 lbs and the 3rd 20 ft weigh 1000 lbs and the last 10 feet weigh 1000 lbs. For a total...

Homework Statement A 1 cm radius pipe connects a 3 m tall water tower to a faucet. (a) What is the gauge pressure at the faucet when the faucet is closed (b)12 What is the gauge pressure at the faucet if the faucet is opene d so that there is a flow of 0.2 Liter/s? Assume that the water flow is...

Hello everyone, I am thinking of a thought experiment about a so-called "space tower" but don't have enough information to estimate the numbers. I understand the material strength needed for such high structures is huge, because of the weight of the structure. But what if the "tower" would be...

Homework Statement I'm supposed to calculate all the states for a system with ##l=1## and ##s=1/2##. Let's say ##\vec{J} = \vec{L} + \vec{S}##. I want to find the Klebsch-Gordon coefficients. I know that said system has 2 towers, one with ##j=3/2## and the other with ##j=1/2##. I've...

I'm attempting to design a turbine for a small scale solar updraft tower. It produces between 1-3 m/s of air flow in a 0.3m diameter tower. I'm in need of resources that can guide me on designing the turbine fan. I've already got the Wind Energy Handbook, however I'm not even sure if following...

Hello all, first post on here. My fathers friend recently died of cancer and he was the person we used to turn to for this question, I've been racking my brain and searching the net for info, found this link (http://www.schsm.org/html/gear_ratio_calculations.html) and have got the ratio down...

Homework Statement If you have a water tower (basically a cup) open to the atmosphere, with a siphon (basically a straw) inside it as shown below: (sorry assume the height h extends to the bottom of the cup instead of only part way - would that change anything though?) Then what is the...

In General Relativity spacetime is described by a metric. The most common one is the Schwarzschild metric, valid at radii greater than the surface radius of a mass. If we assume constant angular position so that dθ=dø=0, then this metric relates local (proper) coordinate time and distance dτ...

Homework Statement A mobile phone signal with a frequency of 1945Mhz is being broadcast from a transmitter with a peak output of 3kW. A: What part of the EM spectrum is the signal. Classify it in terms of its orientation of oscillation and propagation. B: Write a general equation for the...

Hey everyone! I am working on improving natural draft counter flow cooling tower efficiency as my final year B.E. project. I came across a research paper that said that at transverse cross section of the tower, above drift eliminators, the air velocity decreases from the periphery to the...

the well known hanoi tower algorithm is as follow: public static void hanoi(int n,int a,int b,int c) ( if(n>0) ( hanoi(n-1,a,c,b); move(a,b); hanoi(n-1,c,b,a); ) ) my problem is : can we handle this algorithm in this method? we can regard three places as one place...

This seems simple but I am having trouble with this. I have 70' self supporting tower that I want to be able to raise and lower with a winch. The tower is hinged at the base. I want to use rectangular steel tubing 7' high with a pulley at the top. See PDF attachment. I need to know the force...

1. Given info ( with attached photo) The guy wire supporting a 100ft tower has a tension of 550lbs. Use the distance shown in the figure write the component form of the vector F representing the tension of the wire. 2. My attempt at the solution My first assumption was to make a vector using...

I'd like to produce a plot that looks like Taken from page 86 of AP French's Vibrations and Waves. I'm searching for some good Texas Tower data. Can you recommend an archive of physics experimental data? Or what I'd like even more is a spreadsheet with some texas tower data.

Homework Statement A diver jumps from a 13m high tower, and hopes to complete 212 somersaults. what should be the rotation rate be Homework Equations The Attempt at a Solution 13 m = (1/2)(9.81 m/s²)(t²) t = 1.628 s ω = 2.5 rev / 1.628 s ω = 1.53 rev/s I'm still...

Homework Statement Draw a motion diagram for each motion described below. -Use the particle model -Show and label the velocity vectors 22) Galileo drops a ball from the Leaning tower of Pisa. Consider the ball's motion from the moment it leaves his hand until a microsecond before it hits...

Hi everybody! I'm currently working on a project where a wet cooling tower is involved. The wet cooling tower is an induced draft system. I know the volume of air handled and also the properties of the air entering and leaving the system. I want to determine the electricity consumption of...

I just wanted to know how a town or a tower clock works. I would like to know if I can device a mechanism such that I will be able to use the striking train to strike every second, loud and clear i.e. I must get a loud chime every second but without using an electrical supply.

The equation of the tower structure is a hyperbola of f(x)=E/(X+F)+G hight=23, and meets ground 11.5m on either side of axis , curve also passes through (4,3) This helps to form 3 equations... Use height to find first equation. Use the points where the tower touches the ground on the...

Hey all, Newbie here. Can anyone please help me identify the tower in the following picture? Is it communication, cellphone or internet tower? What is it used for? It's not a homework question. I'd really appreciate a speedy reply, TIA!

Looking for a bit of help on finding some advantages and disadvantages of using this proposed stewart platform (cable) system (James Albus invention) on a tower crane. How would it improve load control? Would it genuinely stop the load from swaying? Would it allow for more accurate positioning...

where can I find the" cooling tower institute blue book" soft copy Hey I'm doing a university project on cooling towers .The cooling tower institute published certain curves [cooling tower characteristic curves ] that I need on the "cooling tower institute blue book". There is also have a...

I'd like to know the dimensionless parameters affecting a counter-flow induced draft cooling tower's performance, or if someone could direct me to an adequate resource . I'd also appreciate if I could be directed to some good comprehensive resources on cooling tower design Thanks guys

Ok, I have a question pertaining to the load a Macpherson strut tower sees VS. the load a particular double wishbone car sees. Basically since the macpherson strut is required to hold the weight of the car and control the cornering forces imparted through the tire/ upright, I was under the...

Homework Statement For a solar tower compare the total force on the air column in the tower (i) by calculating the pressure at its bottom and top (ii) from Archimedes’ Law. Hint: there is a temperature difference between top and bottom of the tower. I have to estimate height...

Hi Friends, One of the ISP from India is requesting my permission to place the 4G wifi broadband tower on my building [Residence]. I got families, kids and a pregnant lady staying in the building. I am worried will the microwave or radio wave radiation may question their health. Could you...

I am working on an animation, which involves a rigid, vertical tower falling (toppling) to the ground, and I am stuck at its core physics. Actually this is the same as the thin uniform rod initially positioned in the vertical direction, with its lower end attached to a frictionless axis...

Hello, For my Mechanical Engineering project, I'm working on a wind tower. One of the specifications we have to respect is a 50 years resistance to sunlight. We've chosen inox steel as the primary material (after calculating the various constraints due to the wind the the rotor up on the...

Hello. I need to estimate height and diameter of a cooling tower. My water requirements are 50000 m3/h, for a cooling duty of about 730 000 000 kcal/h. For this capacity, I thought that an hyperbolic tower, natural draft, would be the best choice. Am I right? Water temperatures in-out would...

I've written a code for the problem but I'm contantly getting segmentation fault, core dump error, kindly help. I'm using gcc from ubuntu 12.04, Here is my code... #include<stdio.h> //#include<conio.h> #include<stdlib.h> struct node { int ind; int ele; struct node *next...

Homework Statement Tossing a water balloon from a building at an angle of 30 degrees. Inital velocity is 3 m/s and the window which the balloon is thrown is 50 m from the ground. for vertical velocity i got 2.6m/s, horizontal i got 1.5 m/s There are 4 pts. A is the starting point. B is...

Homework Statement The problem is as attached.The Attempt at a Solution I tried doing double integration of r from 0 to 9.8 and θ from 0 to 2pi. But here I am assuming all forces from the soil act along the tower (no friction) and managed to solve C1. But I am not sure how to solve C2?

I am always looking for the right combination of cooling products to keep my system frosty and in my digital travels I have encountered a wide variety of fans, heat sinks and liquid cooling units. Now perhaps I have just overlooked them but why has no manufacturer ever come out with a micro air...

Hi! I'm doing my master thesis about designing a offshore wind turbine tower for subarctic conditions and I have a major problem with units I'm not much familiarised with Ansys, so I use Ansa as preprocessor and launch the solve in Ansys The problem I have is in units. I'm using Ansys...

I got this sweet computer tower with a hinge door. The front where you have the drives and power button are missing can i make my own front?

This is an argument I thought up after a class on combinatrical properties of the model \textbf{L}. Our course is about set theory, not logic, so this paradox desn't seem relevant in its context. Can you help me figure out where I got it wrong? The constructible heirarchy of sets is a series...

Homework Statement The object is a crane arrangement of pipes that falls forward without any loads or counterweights on it. We can take it apart measure the weight and the length of the individual pieces.How much weight can a tower crane lift without tipping? I just need a general way to...

As part of an assignment, I have been asked to construct a tower that is completely made of paper and sticky tape. This tower must be built with 4 specifications: 1. Must be built of nothing but paper and tape no cutting devices, glue, ect ect. 2. Must be built within 5 minutes. 3. Must be...

Not sure, but I think many would have known this: http://luxatic.com/invisible-tower-cheongna-city-tower-going-to-be-built-in-korea/ Would like to have comments since it is based on principles of optical physics (I'm not a physicist but just a curious Structural Engineer) if this is...

Homework Statement A rock is thrown vertically upward with a speed of 17.0 from the roof of a building that is 60.0 above the ground. Assume free fall. In how many seconds after being thrown does the rock strike the ground? Homework Equations I used v^2 = vinitial^2 + 2a(y - yinitial)...

elevator of torronto tower...? the elevators in the torronto tower travels at 370m/min from ground level to the top floor . suppose that when the elevator begins to rise from ground level a coin is dropped from the top floor down the elevator shaft. at what height does the elevator meet the...

Questions about Wardenclyffe Tower and it's plausibility... Hello! I have always been fascinated by Nikola Tesla (who hasn't? :)) and other rare birds that share such innovation. I know the history of wireless electricity and that it is possible, and I know about Wardenclyffe Tower. I am...

I have recently been studying the infinite power tower: f(x) = x \uparrow\uparrow\infty The function should actually be written with the infinity replaced by an n and the whole expression evaluated as a limit as n goes to infinity, but I am terrible with Latex. Anyways, I noticed that it...

A natural draught cooling tower is designed to have a 3% loss of the mass of the water entering the tower by evaporation into the atmosphere. Atmospheric air enters the tower at a volume flow rate of 4 m^3/s a temp of 10C and a relative humidity of 50%. Air leaves the tower in a saturated...

Hello all, I am not an engineer, but I am a 32 year steel fabricator, I have recently built a 17 foot wind turbine with an axial flux alternator, I would like to build a tower for it but would like to get a general idea before I go to a local engineer for actual stamped drawings which are...