What is Tower: Definition and 187 Discussions

A tower is a tall structure, taller than it is wide, often by a significant factor. Towers are distinguished from masts by their lack of guy-wires and are therefore, along with tall buildings, self-supporting structures.
Towers are specifically distinguished from buildings in that they are built not to be habitable but to serve other functions using the height of the tower. For example, the height of a clock tower improves the visibility of the clock, and the height of a tower in a fortified building such as a castle increases the visibility of the surroundings for defensive purposes. Towers may also be built for observation, leisure, or telecommunication purposes. A tower can stand alone or be supported by adjacent buildings, or it may be a feature on top of a larger structure or building.

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  1. Adhna

    Tower Height for Lead Bullets: Can Someone Help?

    Can someone help my problem Grains of lead bullets used in rifle cartridge made of small round pellets 2-3mm in diameter and is made by dripping molten lead from a tall tower , this method has been used since its invention by William Watts in 1782. To produce granules of lead ball must be...
  2. DocZaius

    Tower of exponents solution approach unique to exponents?

    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...
  3. Serenity4uswild

    Tower out of paper that would support a textbook

    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...
  4. Stephanus

    Solve 4 Pegs Hanoi Tower: Algorithm & Best Move Ideas

    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...
  5. J

    Solar updraft tower: How small a working unit can be made?

    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...
  6. S

    What is the Tension in the Tower Crane Cable?

    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...
  7. P

    Calculating hydraulic cylinder size wind turbine tower

    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...
  8. T

    Faucet connected to water tower

    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...
  9. P

    Buoyancy of a vacuum-filled "space tower"?

    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...
  10. DataGG

    Addition of angular momentum - Finding the second tower states

    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...
  11. L

    Solar Updraft Tower turbine design

    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...
  12. D

    Tower Clock Gearing and Motor Speed

    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...
  13. H

    Maximum height at which a siphon can drain an open water tower

    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...
  14. R

    A clock tower puzzle in a gravitational field

    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...
  15. F

    Mobile Phone Tower Question - Wave Equation and No. of Photons Per Sec

    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...
  16. R

    Air Flow through cooling tower- fluid mechanics problem

    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...
  17. P

    Can we view the hanoi tower algorithm as the following way?

    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...
  18. A

    Raising a 70' Tower: Calculate Cable Force

    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...
  19. Y

    Finding the Tension of a Guy Wire Supporting a 100ft Tower

    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...
  20. M

    Where Can I Find Texas Tower Data for Physics Experiments?

    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.
  21. N

    Calculating Rotation Rate for a Diver Jumping from 13m High Tower

    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...
  22. S

    Motion Diagram of Galileo's Ball Drop from Leaning Tower of Pisa

    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...
  23. S

    Electricity consumption of a fan in a cooling tower

    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...
  24. Y

    How Can a Mechanical Town Clock Be Modified to Chime Every Second?

    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.
  25. V

    MHB Solving for Hyperbolic Tower Equation: F, G, and E

    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...
  26. T

    Identifying the Purpose of a Tower: A Scientific Inquiry

    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!
  27. D

    Stewart platform on tower crane

    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...
  28. T

    Where can I find the cooling tower institute blue book soft copy

    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...
  29. T

    Dimensionless parameters affecting cooling tower performance

    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
  30. E

    Need some help determining strut tower load

    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...
  31. A

    Force on air column in a solar updraft tower

    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...
  32. A

    Medical Is the 4G internet tower harmful for health?

    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...
  33. Z

    Falling (toppling) rigid tower (uniform rod)

    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...
  34. E

    Steel wind tower resistance to sunlight

    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...
  35. I

    Sizing of a hyperbolic cooling tower

    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...
  36. E

    Using theMatLab Monte Carlo method for volume of CN tower

    Homework Statement I have to do a monte carlo approximation for the Volume of the CN tower for my assignment but I don't know what size to make the cubes and for the part below the main pod I do not know how to create a tapered tower for loop that gets smaller with each loop so that the...
  37. A

    C tower of hanoi - Stack Implementation using structures .

    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...
  38. S

    Projectile problem: throwing something off a tower

    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...
  39. U

    Analyzing the Leaning Tower of Pisa: Solving for C1 and C2

    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?
  40. DHF

    Air Conditioner for your tower?

    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...
  41. S

    Ansys Guru Needed: Troubleshooting Offshore Wind Turbine Tower Units

    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...
  42. S

    DIY Computer Tower Front - Can I Make My Own?

    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?
  43. A

    Paradox with elementary submodels of the constructible tower

    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...
  44. M

    Calculating maximum load and counterweight of a tower crane

    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...
  45. E

    Can a paper and tape tower hold 1 L of water for more than 1 minute?

    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...
  46. S

    Korea's upcoming invisible tower

    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...
  47. R

    Time to Hit the Ground for Thrown Rock?

    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)...
  48. khurram usman

    Elevator of torronto tower ?

    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...
  49. T

    Questions about Wardenclyffe Tower and it's plausibility

    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...
  50. D

    The Infinite Power Tower

    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...
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