Tube Definition and 886 Threads

Hello dear sirs/madams, I would ask you to answer the following question. I have a flexible hose with a diameter of 5 cm, a length of 10 meters, it is in a vertical position and is filled to the top, with water. The hose is sealed on the top and the bottom. At the top of the hose...

Hi all, I hope this is the right place for this question. What effect does increasing voltage have in an X-ray generator? What's the optimum voltage for the most efficient production of X-rays and why? Thanks

1. A sound wave with frequency f = 2300Hz is sent into a circular tube of radius R=160cm through an opening at some point A. A receiver lies at point B, separated from A by an angle α=130°. The speed of sound in air is v=330 m/s. Sound propagates from A to B in both directions along the...

I would like to find an easier way to build spice models from old data sheets. Normally one would have to tediously build spread sheet tables from curve traces of these old tubes. However, I was wondering if there is some sort of program that allows one to trace lines over the images, set...

Hello everyone, I really feel out of my depth here, especially with this simple question. I'm trying to rig something up and understand why it's not working. With a pipe connected to a wine bottle sized bottle, syrup won't flow into the pipe (1cm diameter, 60cm long, down to a tap). For...

A U-shaped Tube problem... Homework Statement A u-shaped tube with a 1 square centimeter cross-section is filled with mercury to a depth of 50 centimeters on each side. One side is capped and the air pressure is 750 Torr. The other side is connected to a vacuum pump. a) how far does the...

Homework Statement A student performed the experiment to measure the speed of sound in air using resonance air-column method. Two resonances in air column were obtained by lowering the water level. The resonance with the shorter air column is the first resonance and that with the longer air...

Hi everyone, new poster here. I'm a chemist who's in a little over my head with an electrical engineering problem, and I'm hoping someone here might have some advice. The short version (details to follow) is that my experimental setup has a photomultiplier tube (PMT) detector whose output has...

Homework Statement I am building a CRT for my physics project but have some doubts. I know there will fluorescence effect but my project requires to do an experiment and make observations. So how can I relate this experiment so that I have:- 1. Different cases and experiments with the CRT...

Homework Statement Helium at 20°C passes through a pipe with an initial diameter of .3 meters decreasing to .25 meters. The helium flows at .30 kg/s and an initial pressure of 200 kpa. Find the difference in pressure ΔP across the decreasing section. Assume incompressible and inviscid flow...

Homework Statement The problem depicts a tube shaped like a "U". The arms of the tube are 0.3m in height and the horizontal part of the tube is 0.6m long. The left arm of the tube is open while the right arm of the tube is closed. The problem states that the liquid in the tube is of density...

Homework Statement The assignment is not in english but I'll try to translate it. I hope I've posted it in the right thread. You have a tube which is 48 meters long and one end is closed while the other end is open. You take the tube with the open end first into seawater (1025 kg/m3) and drop...

Homework Statement For a flow of a compressible fluid through a narrow tube, the following statement is correct a) the volume of the fluid crossing any section of the tube is constant. b) density of the fluid is independent of pressure. c) mass of the fluid crossing any section of the...

Hey guys. I can't figure out part 3bii) of this Venturi Tube Question. The answer I keep getting is 3.7907E-03 but it should be 3.95E-03. I'm definitely missing something but can't figure out what. I'm out by about 5%, could it just be down to rounding errors? Question and my working is...

I've been looking to do a physics project, and since particle accelerators are too dangerous, I was thinking about building a cathode ray tube (CRT) I've done some research about building CRTs, and haven't been able to find anything that gives a complete list of how to build a CRT. Could anyone...

Why is it that the maximum sound coming from a Rijke tube happens only when heated wire gauze is placed at 1/4th the length of the tube from the bottom. According to Rayleighs criterion(copy pasted) "If heat be periodically communicated to, and abstracted from, a mass of air vibrating in a...

Hello guys, Ok let's say there is a man with fluid in his lungs. You put a chest drain (intercostal tube). How does it drain? 1. Since the container is below the chest, when the guy expirates due to high pressure does fluid just flow to container? Can there be any retrograde flow (since...

Homework Statement In a lab experiment on emission from atomic hydrogen in a discharge tube only a small number of lines are observed whereas a large number of lines are present in the hydrogen spectrum of a star. Why? The Attempt at a Solution I think it is related to temperatue but I...

Homework Statement A capillary tube of radius r = 0.3mm is filled with water. A water droplet is hanging on the bottom of the tube, as shown in the picture. The water level is h = 5.2cm. Estimate the radius of curvature of the droplet R. The coefficient of surface tension of water is σ =...

Homework Statement An incompressible fluid with density ρ is in a horizontal test tube of inner cross-sectional area A. The test tube spins in a horizontal circle in an ultracentrifuge at an angular speed ω. Gravitational forces are negligible. Consider a volume element of the fluid of area...

My question is: Researching two sizes of square steel tubing to use for a project. material 2 inch square tubing with 0.25 thick wall and 3 inch square tubing with 0.25 thick wall. The square steel tubing will be welded on to a frame at an angle so the corners point up and down , or another...

Invention prototype -- help please with bent half tube... Hi all, I am in the prototype phase of an invention and I need part that I can't get made and was looking for a few ideas. As you can see the part is double-curved 16 gauge sheet metal. I brought it to a sheet metal shop and the guy...

Hey guys any help you can help me solve a problem at work. I've been UV testing some polymide tubing and I need to know if it will survive one of our manufacturing processes post UV exposure. The OD is 21 (0.91 mm) thou and wall thickness is 3 (6.4 mm) thou. It will be loaded with approx 4kg...

Hello, I was wondering if I could get some advice on how to build a robot that can traverse the inside of a twisting square tube, whilst staying at its centre. Heres an image of the kind of tube it will be: Its probably doable with a rollercoaster style design but it seems like an...

I'm trying to model a Transfer function for the response of the deviation in temperature of water coming out of the concentric tube heat exchanger in response to an input velocity of water function. THE PROBLEM I start the derivation with a couple equations in Seborg's Process Dynamics...

Bill and Ben are a fixed distance from each other. Bill sends a laser pulse to Ben and times how long it takes to get there and bounce back. Now a very heavy tube is placed in between Bill and Ben. The light pulse is sent again so it passes through the tube. The tube is along the same axis...

Homework Statement Bead (mass point - mass m and charge q) is free to move in a horizontal tube (without friction). The tube is between two spheres (separated by a distance 2a) with charges Q = − q. What is the frequency of small oscillations around the equilibrium point of the bead...

Hi, i have been working on this problem for a while. i just need some guidance. the question is: design a ztube scanner suitable for displacing ±1 micron displacement at 200V. i am using this equation: ΔL=([d]_{}[/31]×V×L)/t ΔL=(d31 ×L×V)/t ΔL=change in length = 1micron...

I am working with mild steel 1/16" wall tubing. I am sleeving this over another tube to extend it. The attachment point is 12" past the end of the sleeved tube. How much weight can the extention tube handle before it would bend? Thanks

Homework Statement Please refer to the image attached. Homework Equations P=hρg The Attempt at a Solution My workings: 16000=h1ρg 8000= h2ρg Since ρ and g are constant, therefore h1:h2 must be 2:1. But the answer is 18:12. Why am I wrong?

Homework Statement (1.1.10) The diagram below shows a U-shaped tube. The fluids in the tube are glycerine (blue shading) and mercury (gray shading). The height of the glycerine column on the left side of the tube is h1 = 5.00 cm. The density of the mercury is 13.53 g/cm3 . (a) What is h2...

Hi Everyone, Hope this is the right section of the forum. I need some help to design a small tube heater for a specific application. I have attached a crude picture to show what i need. The flame needs to travel through a 3/4 inch pipe about 7 feet to heat the water. The problem is that i...

Homework Statement A chain AB of length ##l## is located in a smooth horizontal tube so that its fraction of length ##h## hangs freely and touches the surface of the table with its end B. At a certain moment, the end A of the chain is set free. With what velocity will this end of the chain slip...

I have a question about how to calculate what size of steel tubing to use in building a boom for a wrecker. Tentatively the compressed length will be 12, and extended I would like to be 28' as this will be a 3 stage boom. I would like to have a safe working load limit of 5Ton at full extension...

The problem statement Recently I came across this problem and couldn't understand it. I know that in situation 1, the length of the specific place will be decreased; In situation 2, it will be increased. Can someone help me here? Thanks first!

Homework Statement An electric charge q is uniformly dispersed over a surface of elliptical tube with major and minor axis a and b. What is the surface charge density?Homework Equations The Attempt at a Solution I I know that you have to cut the tube into thin ellipses and calculate a linear...

We know that we get first resonance when the length of the air column is λ/4. We get second resonance when the length of the air column is 3λ/4. This is because we get a node at the surface of the water after λ/4 distance in the first case and 3λ/4 in the second case. My question is that what...

Homework Statement a) Find the frequency of vibration under adiabatic conditions of a column of gas confined to a cylindrical tube, closed at one end, with a well-fitting but freely moving piston of mass m. b) A steel ball of diameter 2 cm oscillates vertically in a precision-bore glass...

Homework Statement A tube of length L=1 m closed at its upper end is immerged vertically, with its openend, in water by a distance l=27 cm. The atmospherical pressure is the normal one. Find the length of the water column that enters the tube. Consider the process isothermal. Homework...

Hi Seniors and Fellows I really need your help to finish my project .I have struck at a point which is given below :- I have to do insulation around a vacuum tube in which thermocouple is placed . I have to choose a high temperautre 650 C insulation material. Inner and outer diameter of...

Hey y'all, Thanks in advance for any help on this. I'm kind of stumped by this problem I've come across in the lab. We have a tube reactor with a nozzle, and we want to measure the combustion/pyrolysis products coming out the model using GC/MS and MBMS. Right now, we are just running...

Fluid flows faster in a narrow tube which results in low pressure and high pressure in a large tube?

Find the friction coefficient between the bar and the surfaces. Both surfaces are equal (and thus have equal coefficients). Ok so, my problem is that, generally in physics when I assume an wrong direction for a vector, I will be able to discover that in my answer (generally speaking the...

Hi, Can you explain why the light increases when Prof. Lewin touch the end of the tube with his finger? He explained it but I am not quite understand it. The video is here at 45:40 : http://www.youtube.com/watch?v=ldJhMDuOGxY

Hi I have a function, which is cylindrical symmetric given by f(x, y, z) = \exp(-x^2-z^2) For a given y, the function \exp(-x^2-z^2) = c traces out a circle (where c is a constant). A contourplot of f(x, 0, z) is attached. However, this is for y=0 (currently, I get the same plot for an...

Homework Statement It is observed that a tube open at both ends exhibits harmonics at 438 Hz, 584 Hz, and 730 Hz. A) Calculate the fundamental overtone of the tube. B) Calculate the length of the tube. Homework Equations L=lambda/2 x n, v = f x lambda The Attempt at a...

Homework Statement Homework Equations The Attempt at a Solution Honestly, I don't have any idea on this. As far as I remember, the usual practice is to equate the excess pressure equal to ##2T/R## (where T is the surface tension and R is the radius of curvature, this may be wrong...

How much weight can .75" sq tube tripod handle I would like to build a tripod 12' high to lift and permanently hold approx. 150lbs. It will be lifting an 18" dia. drum as high as the tripod will allow. I thought of using a triangle shaped plate at the top to enlarge the upper diameter of the...

Magnet dropped down a copper tube experiment (magnetic braking?) Homework Statement Experiment: what is the effect of the # of magnets on the time of drop through the pipe? Magnets are placed in a paper cylinder container - "one magnet" is 1 magnet and 5 weights (mass of 1 magnet and 1...

Hey guys, Long time lurker, first time poster! Here is my query... I need to send a load weighing 10-12kg down two horizontal, parallel, cantilevered, grade 316 stainless steel tubes -- or bars -- each between 3-4 feet in length, 3/4" in diameter, and spaced 85mm apart. What I'd like to know...