Tube Definition and 829 Threads

i need a equation that discrip the movement of laser ray in the tube in a way that it won't get out

Homework Statement It is known that water in a capillary will rise to a certain height, as shown in the figure. Comparing the points P and Q, which point exhibit larger pressure? a. P b. Q c. The pressure of P and Q are the same Homework Equations F_upward=2*pi*R*T*cos⁡θ W=pi*R^2*...

Hi All, I am designing a vertical venturi tube to be inserted into a 18" piece of ductwork in order to pull steam generated in a 12'' perpendicular duct. I would like to reduce the diameter from 18'' to 6'' at which point i will tie in the 12'' perpendicular duct (nozzled down in size) in...

I am looking to find the maximum psi or atm capacity of a tungsten tube of 99.9% tungsten. How would I do this?

I have been looking all over the web and can find nothing...How do I calculate this? Please help if you can..thankyou

I'm studying about photomultipliers right now, but I'm having troubles understanding the concept of gain and secondary emission ratios... 1) Gain : If I were to take a measurement of the output signal produced by photoeletrons and relate it the the high voltage of the PMT, I'd expect a linear...

Homework Statement The tip of the Pitot tube is at the top of the jet. Calculate the flowrate and the angle θ . Homework Equations The Attempt at a Solution Please see attached images. 1 is the question and 1 is my attempted solution. I think I perhaps have done the first part...

I have a venturi tube and downstream of it, there is a small secondary opening at the end of the throat. This is where the local vacuum is created as the velocity increases and the pressure decreases. This difference between this pressure and the atmospheric pressure will induce air into the...

Homework Statement For your senior project, you are designing a Geiger tube for detecting radiation in the nuclear physics laboratory. This instrument will consist of a long metal cylindrical tube that has a long straight metal wire running down its central axis. The diameter of the wire...

Im a new to this site because my have a question that i don't know how to answer and it really confusing me. If it possible, can you guys show me step by step on how to solve it. A venturi tube has an inlet diameter of 3.0 inches, a throat diameter of 1.5 inches and an outlet diameter of 3.5...

Preferably YBCO or BSCCO as I only have liquid nitrogen at my disposal. The issue I'm running into is that no HTS producer makes superconductors in this configuration. I was thinking of just buying the YBCO powder and then either pressing it into the desired shape or mixing in a binder of some...

I'm doing an experiment which requires the fabrication of a superconducting hollow cylinder but I am unable to find a firm which does custom manufacturing of this nature. I have found numerous which sell the high Tc powders (YBCO BSCCO). My question is if I do just buy the powders what could I...

Please Help! Integration! Hi! I'm having a little problem with an exercise and I don't know how to sort it out. Basically what I have is a tube of 5mm ejecting spray fuels. At the exit plane I have positioned lasers to measure the volume flux at different locations, starting from one side...

Homework Statement In a U-shaped tube, water is flowing with velocity v. The flowing rate is u, and it's constant. What force does the water exert on the wall of the tube.Homework Equations F = dp/dt u = m/t The Attempt at a Solution The change in momentum is mv - (-mv) or 2uv \Delta t...

Hey, In an X-ray tube, you know how there is the target where the electrons collide and stuff... and you know how there is the tungsten part and the the copper bit (the tungsten being the one which electrons collide on)... well my book discusses them separately and i am just a bit confused...

Hey guys, I have a couple of questions regarding X-rays and how they are produced. 1) Is an X-ray an electromagnetic wave or a photon? 2) Why is it that when the electrons collide with the anode in an x-ray tube, X-rays are emitted and not any other electromagnetic wave/photon? 3) When the...

Hey, In x-ray tubes, how come an increase in the voltage results in an increase in the intensity of the electrons. i.e. the no. of electrons emitted per unit time per unit second. Thanks.

Alright guys here is the deal, i have had a vortex cooling system on my mind for a while and started wondering could it be made larger, with more air flowing through it, but with less PSI and still cool at least somewhat? i was thinking of making a larger one and attaching it to a high...

Hi i want to calculate the concentrated pressure drop in a tube having 90 round bend and other one having 180 round bend. The equation that i know is: dP (concentrated) = 1/2 * b*r*v^2 where: b=specific coefficient for concentrated pressure drop r = liquid density (kg/m³) v = average...

Which pressure or force is higher to rupture a tube,to rupture it from inside or outside ?I think from outside will be higher due to greater surface area .

We have 3 interstage coolers for a Synthesis gas compressor.Synthesis gas is mostly H2 & N2 with small Ar & CH4.Tube side fluid is water & shell side fluid is Syn.gas.The heat exchangers are made of carbon steel.Now due to corrosion in tube to tubesheet joint we like to use SS for tubes.But our...

Homework Statement Homework Equations Fq=E*q kinematics equations... The Attempt at a Solution The problem is that in the end I get a value ABOVE the mid-axis instead of below. I don't know what I'm doing wrong. Please check my reasoning. Stage 1: While it's in between the plates where...

Homework Statement I have a question involving a venturi tube - Air flows through the channel of a venturi of constant width 0.06m. Compressibility and viscous effects are negligible. a) Determine the flowrate when water is drawn up 0.10m in a small tube attached to the static pressure tap...

Homework Statement Q1)why will there be initial flickering when we siwtch on tube light Q2)is starter and capacitor both are same ?(OR)are both of them are enclosed in a single package? Q3)what is the function of capacitor, is it for power factor improvement? Homework Equations...

The ideal gas law staes that pressure is inversely proportional to volume. Makes sense but I am confused by what happens in a venturi tube, where volume seems to decrease at the same time that pressure decreases also. I understand that dynamic pressure increases in the throat but what am I...

PVC End Plug and Tube shape retention under heat and force?? Hi, I'm Mai from one of the semiconductor company. I'm in charge in supplier quality enginnering. I have an issue happened in my customer side where, whenever they received the unit from us the unit will spill out from the packing...

A speaker is generating waves in a gas that is closed in a tube. The tubes closed end is at x=0 and the speaker is at x=1. The motion of the membrane is given by s=s_0 \cdot sin(\omega t) How does the particle displacement vary with x and t? The wavelength is \lambdaI do not know how to solve...

When I read some heat transfer book, I got a problem. There are some numerical calculation methods in dynamic heat conducting in tube wall, but all the methods assume the temperature on one side of the tube and then calculate the temperature distributed in the wall. But are there some methods...

Hi all, Im new to this forum and would greatly appreciate any help i can get. I work for a solar hot water company and we have taken on an unhappy client who has been sold a custom thermal storage tank (by another firm), with a corrugated stainless steel tube immersion heater. The hot...

Hello, I'm an undergraduate student, doing an independent research project under a professor this summer. So the experiment I am working on involves using a glow discharge tube, with electrodes at two ends, to create and contain a plasma column. The purpose is to measure and analyze "wave...

Hi guys, new to the forum here. I have of a conceptual question that I can't wrap my head around. Here's the situation: there's a reservoir filled with water attached to a "three-column manometer" with each column open to the atmosphere. The horizontal tube that connects all three of the...

Homework Statement An enclosed vertical tube rotates about its vertical axis at w=3000rpm. At the axis, r=0, P=1.5bar and T=293K. What is the pressure distribution as a function of r? And hence calculate the pressure at r=2m. The Attempt at a Solution I have seen this type of questions...

I came across a couple of cow magnets a while back. When you drop a cow magnet down the center of a vertical piece of steel conduit, it doesn't drop as fast as it usually would. When you drop a cow magnet down the center of a vertical copper plumbing pipe (closer fitting than the conduit)...

Homework Statement Water flows through venturi tube at 0.3 litres/s. Diameter of venturi tube is 32mm to 20mm to 32mm and the water density is 1000kg/m^3. Homework Equations a) Assuming head loss is neglible, what is pressure difference between 1 and 2. b) If pressure head...

Hello, I have a production problem and would welcome any ideas which would make this task easier. I need to fill a 5 meter tube with pellets of 5mm grain size. The inner diameter of the tube is approx 40mm. Here's the problem...I need to fill the tube while the pipe has only a...

Im making an A frame to tow a quad bike behind a car, i need to know something because it affects the design. Imagine a steel tube of an arbitrary length of 1 inch diameter, and 2mm thick walls.. It will have a specific inherent strength before load causes it to buckle or deform. now drill a...

I am converting some old gas cylinders into chimes. They are empty and have the valves removed. They held inert gas, not fuel gas. They are 8" inside diameter steel cylinders approximatly 5' tall. I wish to cut them to harmonic lengths, but do not remember what I learned in physics regarding...

Hello folks, I am on a project that involves combining Raman microscopy + optical tweezers, and I made a setup over the past year. All of this is home built on minimal funds so its not the neatest of all setups. It involves an upright microscope (coupled to trapping laser) and collecting the...

Homework Statement A long U-tube contains mercury (density = 14 × 103 kg/m3). When 2.0 cm of water (density = 1.0 × 103 kg/m 3) is poured into the left arm, the mercury in the right arm rises above its original level by Homework Equations Density*gravity*height(on the left...

3-pin (Gas Discharge Tube) Surge arrester rating "DC spark over voltage" Could someone please help with a question about Gas Discharge tube, surge arresters rating? I am looking at a public address audio equipment which uses a 100vrms audio lines driven from a audio transformer. Currently...

Homework Statement We have 5 cm of external diametre tubing with 200*C of superficial temperature. The boundary temperature is 20*C and the convective heat transfer coefficient is 3.0 W/m^2*C What is the heat loss Homework Equations q = U*A*(T1-T2) 1/U = 1/h1 + [r1 * ln...

Sportnut: If I am using exact same aluminum material, with exact same thickness of gauge and I construct a 4ft long hollow circular tube that is 1" diameter, and I also construct a 4ft long hollow rectangular shaft that is 1" square, which would be more resistant to bending?

Hi All, Thanks for your time. I'm not an engineer nor do I play one on TV. Last time I did any load calculations was in a some college M.E. classes and that was so long ago we were all still using slide rules just a couple years before. No really. I'm going to build a fold-up table for my...

Suppose we have a very small V shaped tube-like vessel that is closed at the bottom (see attached picture). Question 1: If a drop of liquid enters the vessel from the top, what determines the stopping point of the drop (i.e. at what point is the force of gravity countered and the drop...

I need to test a system for liquid sodium wicking under high temperatures. The setup is as follows: Solid sodium pellets are placed in a tube which is then purged of oxygen (replaced with Argon). The tube is sealed and then heated to 300-400 degrees Celsius and agitated with a shaking...

I need to test a system for liquid sodium wicking under high temperatures. The setup is as follows: Solid sodium pellets are placed in a tube which is then purged of oxygen (replaced with Argon). The tube is sealed and then heated to 300-400 degrees Celsius and agitated with a shaking...

Im trying to understand how a Geiger tube works. So there is a wire in the middle of the tube and then an outer metal shell and the wire and the shell are held at a potential difference. And the tube is filled with a gas like Neon , And when like an x-ray comes in, it ionizes a neon atom and...

Homework Statement Seawater flows through a horizontal tube of diameter 3.00 cm that is joined to a second horizontal tube of diameter 1.70 cm. The pressure difference between the tubes is 7.25 kPa. What is the speed of flow in the first tube? Homework Equations I thought it was P1 +...

Homework Statement Find the linear speed of the bottom of a test tube in a centrifuge if the centripetal acceleration there is 5.3×104 times the acceleration of gravity. The distance from the axis of rotation to the bottom of the test tube is 7.3 . Homework Equations I have gotten...

I'm trying to create a piece of software that can approximate the physics of a valveless pulse jet engine. What I need right now is to figure out the math behind the moving air. How would I calculate how the air from the combustion chamber after combustion (assumed for simplicity to be...