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. C

    Calculating Mass Flow Rate of Water in a Natural Draught Cooling Tower

    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...
  2. F

    Designing a Tower for a Homemade Wind Turbine: Considerations and Requirements

    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...
  3. kandelabr

    Wind turbine tower foundation

    Hello. The title of this post may seem too hardcore. Actually, I am building a simple wind turbine made from wood and aluminium thin plate. it has three blades and 120 cm in diameter. It should be at least 3.5 m above ground, on a steel/wood column. I have no idea how to install this pole...
  4. C

    Designing a Reddish-Orange Office Tower: Calculating Film Thickness

    Homework Statement A construction company designs a new office tower with an outer surface mostly made of glass(n glass = 1.52). The company wishes that the glass appear a reddish-orange without having to use coloured glass. Instead, a thin film (n film = 1.65) is used that maximizes the...
  5. S

    Help with idea for tilting tower

    First, I hate heights. I have 3 sections of triangle type tower at my house. So, total length is about 30 feet. My idea is to make some sort of hinge so I could lower it over and raise it. I know I mentioned it before but now seems to be the time I need to do it. (My little boy is...
  6. J

    Help with Cell Phone Tower questions

    I am thinking about buying a great house, however there is a cell phone tower less than 500 ft. away. I know everybody says there is nothing to worry about, but I have found some articles on the internet that do show some adverse health effects living so close to a cell phone tower. Could...
  7. S

    Cell tower near window is it a problem?

    Hi, I'm considering buying a home on a hill that has a cellular tower a eye level with the kitchen room window. The antennas (6) are about 30 feet from the window. The antennas for the most part are directed outward toward the valley. Does this pose a potential health problem? I'd...
  8. N

    RF radiation living near TV/radio tower

    Hi there, I noticed another thread about a guy who was considering living near a cell phone tower. People pointed out that he shouldn't worry because the amount of watts was low compared to tv towers etc. This makes me worry because I'm going to be moving into a property about 200 metres away...
  9. W

    Hydralic force needed to rasie 80' mono tower?

    Hello, I have an aplication that I need some adivice on. I am building a 80' wind turbine and tower that I plan to raise and lower with a hydraulic cylinder. The Tower is 36" .468 wall pipe for 40' then necks down to 24" .375" wall pipe for 40 foot my calculations with the wind turbine says it...
  10. N

    Airflow inside a computer tower.

    I had a question and I figure you guys are the best for the task. I was wondering if theoretically you had a standard computer case, would you benefit by reducing open airspace in the case? Lets say just for example you could place a cube inside the case that doesn't touch anything, it just...
  11. S

    Calculating Acceleration of Kings Dominion Drop Tower

    http://www.flickr.com/photos/39972563@N04/3674854817" Its for my physics project and i have tried searching everywhere but couldn't find it. It is drop zone of kings dominion and i want to find the weight of the object people are sitting on. Basically the whole circular thing. can...
  12. R

    - Cellphone Tower Radiation - tomorrow i must decide

    URGENT - Cellphone Tower Radiation - tomorrow i must decide Hello I recently rented a small appartment and I am a bit shocked by the discovery that there is a big cellphone tower only 75meters away from the appartment, with closest antennas 25meter above the ground. My appartment is on the...
  13. Ivan Seeking

    Falcon 9 has cleared the tower

    It just launched. Due to orbit the Earth twice before reentry. http://www.cnn.com/2010/US/12/08/space.flight/?hpt=T1
  14. M

    Can Someone Help an Old Timer whom would like to Lift his Communications Tower?

    I am getting a bit older, and I have a Aluminum Communications Tower, and used to angle it up by myself from the back of the house to the side. Now I would like to lift the tower to its vertical position on the side of the house using the existing aluminum angled bracket plasma welded to a...
  15. X

    Can a Tower Emit Light by Changing its Frequency to Match Visible Light?

    In electromagnetic spectrum, frequency & wavelength differentiate between radio waves and light waves. So, if the frequency of the radio wave being transmitted by a tower is changed to match the frequency of the visible light, will tower start emanating light?
  16. R

    Average Angular Speed of Tower

    Homework Statement The top of a tower much like the leaning bell tower at Pisa, Italy, moves toward the south at an average rate of 1.4 mm/y. The tower is 59 m tall. In radians per second, what is the average angular speed of the tower's top about its base? Homework Equations...
  17. B

    The Fire Tower - Logarithmic spiral

    Homework Statement I'm trying to figure out what exactly this equation (the one inside the red box) means for this article. The whole article is the attached PDF. Homework Equations The Attempt at a Solution I've been looking at this article for 2 days now and I'm doing OK for the...
  18. M

    Help Mini-Solar Updraft Tower

    Help! Mini-Solar Updraft Tower I need to design and build a "miniature" solar updraft tower and generate the maximum power possible. The only constraints are that there will be a 500W lamp placed 1ft from the ground and 1ft from the chimney oriented at a 45 deg angle. My question is basically...
  19. G

    An extremely long power tower

    An extremely long "power tower" Hey, this isn't really a homework or classwork question. My professor always puts questions that he finds interesting on our notes. This really got my attention, I've been trying to see if it's possible to write a computer program to solve it. However, I've...
  20. X

    Engineering Homework: Tower & Building Heights and Distances

    Hey guys! Me and all of my friends got this work for a mathematics question. But none of us can figure it out. We think they supplied too little information. We studying Engineering. I hope I posted it in the right place. Homework Statement The base of a building and the base of a...
  21. C

    Kinematics Problem on a tower

    Homework Statement An object is dropped from a tower. if it had been thrown down at 60m/s, it would have taken half the time. What is the height of the tower? (Use gravity as 10m/s2) Givens Acceleration = 10m/s2 v1 = 0m/s (not sure) v2 = 60m/s time = t/2 Homework Equations...
  22. B

    Riddle from the dark tower series

    What has a mouth but cannot talk, what can run but never walks? what has a head but cannot weep. what has a bed but cannot sleep?
  23. H

    Double Tower of Hanoi Puzzle: Minimum Moves & Recurrence Relation

    The double tower of Hanoi puzzle contains 2n discs. There are n different sizes, two of each size. Initially one of the poles contains all the disks placed on top of each other in decreasing size. Discs of the same size are identical. You are allowed to place discs of the same size on top of...
  24. C

    Leaning tower of pisa and rotational dynamics

    Homework Statement The leaning Tower of Pisa (Fig. 9-47) is 55 m high and 7.0 m in diameter. The top of the tower is displaced 4.5 m from the vertical. Treat the tower as a uniform, circular cylinder. (a) What additional displacement, measured at the top, will bring the tower to the...
  25. D

    Calculating forces on a tilting tower

    Please see attached excerpt of a report I have been studying. I am going to be building a tilt up tower as in the diagram. However, I may be putting varying loads on the tower top, which they indicate to be 800#. On the second page of the pdf, it shows the tower section weights, lengths, etc...
  26. O

    How can you construct a tall paper tower in 20 minutes?

    Homework Statement I was recently given an assignment to construct, in 20 minutes, the tallest paper tower I possibly can. I have been given a standard sized 8x11 paper with 25 cm of tape. I am looking for relevant input as to how I could build the tallest tower. The tower needs to be able...
  27. H

    Sine laws with Oblique Triangles: The Tower of Pisa

    Here's the question: The leaning Tower of Pisa leans toward the south at an angle of 5.5°. On one day, its shadow was 90m long, and the angle of elevation from the tip of the shadow to the top of the tower is 32°. Determine the slant height of the tower. How high is the tip of the tower...
  28. I

    Located 100 [km] from a transmitting radio tower

    Homework Statement If you are located 100 [km] from a transmitting radio tower, how long would it take the signal to reach you? Homework Equations Have no clue how to start.
  29. C

    Paper Tower - Mats: (1) Letter Size Paper

    Homework Statement Given one piece of standard printer quality paper (8 1/2" x 11"), construct the tallest free standing structure. Materials: 1 Letter size piece of printer quality paperThoughts So I have searched and read through other threads containing this problem, but all require tape...
  30. O

    Tower project: your opinion

    Homework Statement I was just wondering if anyone would like to give me an opinion on how best to build a popsicle stick "tower" that must be able to withstand 100 lbs, or preferably higher. Perameters are as follows: I have been given 100 grams worth of sticks. The structure must be 15 cm...
  31. K

    Bernoulli's Equation of water tower

    Homework Statement The water tower in the drawing is drained by a pipe that extends to the ground. The flow is nonviscous. (b) What is the absolute pressure at point 1 when the valve is opened and the water is flowing? Assume that the water speed at point 2 is negligible...
  32. Helios

    9-level Tower of Hanoi variant

    I have thought of a 9-level "Tower of Hanoi" mutation that I call the step pyramid puzzle because it resembles a classic Maya step pyramid with a square temple house on top of a larger terraced pyramid. 9 ______ 8 ______ 7 ____________ 6 ______________ 5...
  33. D

    Calculus Work Problem (Spherical Water Tower)

    Homework Statement A spherical water tower 40 ft in diameter has its center 120 ft above the ground. That means, there is a 120 ft pole connected to the 40 ft diameter spherical tank. Water is being pumped at the ground level to fill the tank with water of density 62.4 lb/ft3, a) How much...
  34. Z

    Nikola Tesla and his wardenclyffe tower

    I was just watching a biography on Nikola Tesla. Do any of you know about this Wardenclyffe tower he built with the intent of somehow collecting radiant energy in the ionosphere? I believe he also expirimented with the transmission of electricty, either through the ionosphere or the Earth...
  35. T

    Acceleration of a falling tower

    This is problem 67 in Chapter 10 of Halliday/Resnick/Walker 8th Edition. This is one of their three star (= hard) problems. I can get the beginning but then get stuck. A cylindrical chimney of height L=55m falls over. Treat it as a thin rod. Get the radial acceleration and tangential...
  36. T

    Object dropped from tower with deflection problem

    Homework Statement a) An object with mass, m, is dropped from height, h, in a tower located at latitude 30 degrees to the north from the equator. How far will it be deflected? Please derive the deflection in terms of Earth's rotation angular velocity omega, h, g, and m. This part needs...
  37. S

    Packed tower problem (gas-liquid absorption)

    Hi everyone, I'm having a bit of difficulty with a packed tower problem I'm working on. Not too sure how things work around here so I'll just jump straight in... The problem is; A packed column continuously recovers acetone (component A) from air by absorption with water at 60 deg. F...
  38. L

    How High Must A Tower Be To Break Earth's Gravity?

    If I build a tower - let's say, on the equator - and every so often, as the tower gets higher, I drop a stone from its top. Presumably, as I get fiurther away from the Earth's surface, each stone will accelerate towards ground at a lesser rate than one dropped when the tower was lower. How high...
  39. L

    Structural Safety Of Freedom Tower

    I haven't heard much about this in detail, but does anyone know what changes they made in the structural design of the Freedom Tower to prevent the collapse of the tower in the case of it being attacked via jetliners? I know it can't be 100% certain, but I would think they would have done...
  40. L

    How do I find the necessary height for a shot tower in this problem?

    Ball bearings can be made by leting shperical drops of molten metal fall inside a tall tower - called a shot tower- and solidify as they fall. If a bearing needs 4.0s to solidify enough for impact, how high must the tower be? What is the bearing's impact velocity? I've never taken a...
  41. P

    Wave Theory Explains Radio Tower Collapse & Prevention Strategies

    A certain radio tower was stabilized at the top with guy wires, and at the bottom with a concrete foundation. So, it was stable at the bottom and at the top. In windstorms, it wobbled violently in the middle. Eventually the tower collapsed. Using wave theory, explain why this happened and...
  42. Y

    How Does Wind Impact the Structural Tension and Torque of a Seaside Tower?

    1. Suppose we have a tower at seaside (with length L) under a constant speed of wind. Let's assume the force is constant. If we took the drag force equation, only serious variable here is the speed of wind and for a specific time frame let's say for hour or few hours, wind speed and direction...
  43. S

    Nuclear cooling tower analysis, vary shape - best way to go about?

    I've got a project due this Friday whose objectives are no more than a single sentence: cooling tower improvements. This is for a thermal hydraulics class, so I thought I'd investigate the effects of different shapes of a hyperbolic cooling tower on heat flux q" through the walls of the tower...
  44. P

    Gravitational Potential Energy of a tower

    E=mgh how to find the gravitational potential energy if the mass is not given only height is given E.G A man decides to cimb an office tower. If the floors are 3.8 m apart, how much gravitational potential energy would the man have relative to the ground floor if he made it to 5th floor??
  45. I

    A woman carries a bucket to the top of a 40 m tower

    [SOLVED] a woman carries a bucket to the top of a 40 m tower... Homework Statement a woman carries a bucket of water to the top of a 40 m tower at a constant vertical speed. the bucket has a mass of 10 kg and initially contains 30 kg of water, but it leaks at a constand rate and only 10 kg...
  46. S

    Angular velocity of a tower

    A 300m tower is built on the equator. How much faster does a point at the top of the tower move than a point at the bottom? The Earth is 6400km thus c=2pi * 6400000m and c of the top of the tower is c= 2pi *6400300m Now what? Thanks. Stephen
  47. B

    How Can I Build a Stable Tower with Just Paper and Tape?

    I have to build a tower in class that supports at least three textbooks. Materials 2 pieces of regular printer paper 12 inches of masking tape Specifics Must be at least 4" tall Cannot crumple I've been working all day trying to figure it out...any help would be welcomed
  48. U

    Can the Energy Tower design truly generate a positive net energy?

    Here might be a very good idea if it could work: http://inventorspot.com/articles/energy_tower_power_15_Earth's_9102 My question is: how much energy would it take to pump all that water 3000 feet up? Could this construct have a positive net energy, or is it just more pie in the sky?
  49. M

    Exploring Tesla's Intended Use for the Tesla Tower: A Documentary Insight

    I haven't looked into it much but I was watching a documentary that said Tesla intended the tower to fire a massive ball of electricity all the way around the globe and back to the tower again and keep repeating the process. What the hells that all about? I thought the Tesla tower was supposed...
  50. quasar987

    Show that a_n --> 2: Using Calculus

    Homework Statement Let a_1=\sqrt{2}, a_2=(\sqrt{2})^{a_1},... a_{n+1}=(\sqrt{2})^{a_n}. Show that a_n-->2. you may use any relevant fact from calculus. The Attempt at a Solution I noticed that \ln(a_1)=\ln(\sqrt{2})=\ln(2)/2, \ln(a_2)=\ln((\sqrt{2})^{\ln(2)/2})=(\ln(2)/2)^2, ...
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