Tube Definition and 829 Threads

Shanghai Tian Yang Steel Tube Co.,Ltd. is a modern enterprise for tube making which is specialized to make the seamless steel tube of DIN series featured with high accuracy and brightness. Our company has the staff with highly educated and richly experienced engineers and the employees of...

Why first photon emits two electrons in a photomultiplier tube? The interaction is one photon with one electron, am i right? Thanks in advance.

Hi, I experimented with a hydrogen tube and after some time the emission stopped.could it be because all hydrogen atoms became completely ionized?

Homework Statement When you have an open-closed tube, I was taught in high school that when using the equation λ = 4L/m, m = 1, 3, 5, 7, ... where m = 1 corresponds to the fundamental mode. I was taught that m = 1 is the 1st harmonic, m = 3 is the 3rd harmonic, etc. But my physics...

Old CRT tv's use vacuum tubes and they get hot, but how does the glass get hot when the inside is under a vacuum and therefore shouldn't transfer any heat?

i know vortex tube is an element used to cool the air by changing pressure i d like to know how does it work exactly ??

When my Tv shoots electrons from the cathode ray tube , where do these electrons come from and is it ionizing whatever they come from.

Homework Statement Now two fluids are placed in the same tube (d). Both sides are open to the atmosphere without pistons. One fluid is water and the other (on top of the water in the left branch of the tube) is an oil of unknown density. l = 135mm and d = 12.3mm. What is the density of the...

Hi, I have a pretty elementary question, but I'm having trouble finding an adequate explanation on the web. I'm trying to figure out how a carburetor works, and am having difficulty figuring out how a venturi tube works. On the one hand, as air flows through a narrow section of a pipe, it...

[b]1. A 60.0 -cm-long hollow nichrome tube of inner diameter 1.10 mm, outer diameter 4.20 mm is connected to a 3.00 V battery. What is the current in the tube? Homework Equations Resistivity for nichrome = 1.5*10^-6 ohm meters I=V/R E=V/L The Attempt at a Solution

Homework Statement a magnet that weighs 2.6 grams is dropped through a 1.53 metre tube. the average time taken for it to go through is 1.59 seconds. I need to find the strength of the magnetic field and the currentHomework Equations Fg=mg B=F/IlsinthetaThe Attempt at a Solution...

Homework Statement Why does a magnet move slowly in a copper tube, but doesn't in a nonmetal tube? Homework Equations Electromagnetic induction (Faraday’s principle) is the production of voltage across a conductor situated in a changing magnetic field or a conductor moving through a...

Homework Statement A u shaped tube has a total length of 1 m, it is initially filled with air at 293K and 1 atm, mercury is poured in without letting air escape, compressing the air. This continues until the mercury is filled to a level L, how long is L The tube is open at one end, closed...

Homework Statement A 60.0 hollow nichrome tube of inner diameter 1.60 , outer diameter 4.20 is connected to a 4.00 battery.What is the current in the tube? \rho = 1.5*10^-6 ohm for nichrome Homework Equations I=dletaV/R R=\rhoL/A -a should be the crossectional area The Attempt at a...

Homework Statement The radius and the length of the central wire in a Geiger tube are 0.180 mm and 10.0 cm, respectively. The outer surface of the tube is a conducting cylindrical shell that has an inner radius of 1.50 cm. The shell is coaxial with the wire and has the same length (10.0 cm)...

Homework Statement What are the difference between ionization chamber and GM tube in structure which make them have different functions? The Attempt at a Solution Higher voltage is applied to GM tube so that electron avalanche can occur. Then I wonder that if higher voltage is...

Homework Statement An electron is accelerated horizontally from rest in a television picture tube by a potential difference of 25,000 V. It then passes between two horizontal plates 6.5 cm long and 1.3 cm apart that have a potential difference of 250 V, as shown below. At what angle θ will the...

Hello I am attempting to make a total pressure tube/probe to use on small scale wind tunnel testing. Like a pitot static probe, this total pressure probe has to have a 90 degree bend like an L shape. I have several copper tubes of around 3 mm OD. I tried bending them by heating the...

Hi, Anyone knows how to place the DERESONATING BAFFLES in a Shell and Tube heat Exchanger? How does it look likes?

HI, I have builded a tube buggy out of square 1"1/2 x.085 and was told that it was unsafe so I'm looking into it. Was my design unsafe? My question is round stronger then square if so how much? Question 2 dose welding weaken the steel? Question 3 if round is stronger how much stronger is it...

I'm trying to calculate the max load of a rack made of 3X3X1/4 steel tube. It is 8ft long and 4ft wide. I just want to calculate the max load (distributed load) in bending cross the 8ft and also in compression for the legs. i can't find the right formulas. can anyone help? so far i what i...

I am building a new deck - from wood tables I know that my joists need to be 2 x 8 to span the 10 feet of my pond filter pit that is built below the deck. I do not want to give up 8 " of head room while working under the deck - so I am considering steel of some shape or form to use for the...

Would you be in apparent weightlessness?

Right. I know if you drop a strong magnet down a copper tube (or conductive but non magnetic tube) it falls slowly as it 'sees' a changing magnetic field and thus induces a current in the tube and this induced current causes its own magnetic field to be induced and acts a resistive force to the...

http://home.cc.umanitoba.ca/~loly/102-dec_word.pdf The above is a link to the problem - Question #3. Homework Statement A glass tube has several different cross-sectional areas with the values indicated in the figure. A piston at the left end of the tube exerts pressure so that the mercury...

Homework Statement The water level in a vertical glass tube (length 1 m) can be adjusted to any position in the tube. A tunning fork vibrating at 660 Hz is held just over the open end of the tube. calculate at what position of the water level will there be resonance (standing waves) in the...

Homework Statement The U tube contains the liquid.The length of the liquid in U tube is L. If U tube has an acceleration a in X-axis and we make liquid a small oscillation.Find the period of oscillation. The Attempt at a Solution I know the answer is...

Homework Statement The container shown in the figure is filled with oil. It is open to the atmosphere on the left. What is the gauge pressure at point A? Point A is 50cm high from the ground and 50 cm from the top. Homework Equations po+(density)gd The Attempt at a Solution I...

1. A cylindrical open tank needs cleaning. The tank is filled with water to a height meter, so you decide to empty it by letting the water flow steadily from an opening at the side of the tank, located near the bottom. The cross-sectional area of the tank is square meters, while that of the...

Homework Statement A test tube of cylindrical shape having a length of 10 cm and a diameter of 2 cm contains 20 * 10 ^23 molecules (molecular size d = 3 * 10^-10 m). What is the mean free path of these molecules?? Homework Equations λ = 1/ pi * d^2 * n The Attempt at a Solution...

I had an experiment. A test tube containing small portion of aspirin was prepared. NaOH was added to the solution, and then HCl was added. when I mixed FeCl3 with the solution, the solution turned intense purple. This result is the positive test for phenols. And why does this result proves that...

I'm trying to calculate the max load of a rack made of 3X3X1/4 steel tube. It is 8ft long and 4ft wide. I just want to calculate the max load (distributed load) in bending (prob for just the 8ft sides) and also in compression for the legs. i can't find the right formulas. can anyone help? so...

I don't understand how to get n... if that doesn't make sense i can explain more... I have the length and velocity... from there i just don't understand what n even is or means...

Simons cat... You Tube Videos I'm sure many members will enjoy the Simons Cat videos.Try googling.Perhaps somebody here will be kind enough to post a link.

Hello everyone. I have a need concerning a project I'm building. I need to know, or need to know how to calculate the maximum uniform load on a single cantilever of A36 steel tube. It is solidly attached at one end and extends out 42". The material will be one of the following: 1) 2"x2"x 1/4"...

U-shaped tube-- how far does the mercury rise when water is poured into one side? Homework Statement A U-shaped tube containing mercury is open to the air on both ends. Water is poured into one arm until the water column is 15.0 cm deep. How far upward from the initial position does the...

How would a curious young gentleman like myself go about supplying power to a Mullard vacuum tube? I have several different types of Mullard tubes, but no idea as to how I can generate the electron beam. P.S. If side-effects of solution include death, injury or Hannah Montana please do not post.

A horizontal hollow rectangular mild steel tube 30mm x 50mm with 4mm wall thickness and 350mm long, which is part of a frame has 2 lengths of studding 300mm long , 180mm apart and equidistant from the ends, welded to the 50mm face of the tube. A total perpendicular load of 400Kgs is...

Homework Statement In an old TV cathode ray tube, electrons are accelerated by a potential of 15 kV between the gun and screen. Find: a) Kinetic energy of the electrons when they reach the screen b) Its respective wavelength c) Wavelength of the photons with maximum energy that are...

Homework Statement Today our class used a Geiger–Müller tube for the first time, and we conducted a short experiment to prove that Newton's Inverse Square Law also applies to radioactivity. We recorded the number of clicks from a small sample of Strontium-90 for ten seconds at halved...

I have a problem wih my gutters overflowing and I wonder if it is because of the weight of water in the two sides of the downpipes. Essentially I have 90mm downpipes which go underground into 100mm pipes which then come back above ground and empty into a water tank. I am finding that my...

Hi, I'm trying to improve my understanding of flow rates through fluid filled tubes. The backround is that I am an eye doctor specialising in glaucoma. We implant small plastic tubes into patients' eyes to relieve raised pressure. The rate of fluid production in an eyeball is approx...

What is the effect of different tube material (conductivity) on the heat transfer from water in an infinite tube to a surrounding infinite solid? The actual practical application is transfer of heat from hot water (~180F) in 3/4" tubes into sand for heat storage (and then the transfer back)...

As heat build-up is a major limiting factor in x-ray tube design, why can't the anode be kept at a low base-line temp to reduce heating and limit the potential for structural damage to the target? Does operating the x-ray tube at relatively low temperatures, say zero celsius, affect x-ray...

A high-frequency response pressure transducer at one end of a 7 inch long (approx. 0.6 inch ID) tube will be used to measure static pressure pulsations in a duct of flowing air. Interest is for air at 70 F and at 460 F. The transducer end of the measurement tube has no appreciable volume...

A) In a cathode ray tube, electrons are accelerated from rest by a constant electric force of magnitude 6.22 x 10−17 N during the first 2.00 cm of tube's length; then they move at essentially constant velocity another 46.5 cm before hitting the screen. Find the speed of the electrons when they...

Posted this in the coursework forum as well but it doesn't appear any aerospace engineer visits that one :-) I'm supposed to help someone with this for his essay but I don't completely understand it myself. I understand how a pitot tube measures the total pressure, and how a static pressure...

What is the advantage/disadvantage of Cobalt X-ray tube over Copper X-ray tube in a X-Ray diffractometer

Thermodynamics -- Double U Tube Manometer with 2 Closed Ends Homework Statement GIVEN: Fresh water and sea water in parallel horizontal pipelines are connected to each other by a double U tube manometer. Density of sea water is 1035 kg/m^3 Density of air is 1.2 kg/m^3 Standard temp and...

Dear all, I have a simple experiment to make a cheap pitot tube using 3" PVC pipe to measure vacuum pump air flow. But in the middle of my experiment I have difficulty to calculate air flow in the pipe, because I try to use bernouli equation for standard pitot tube and the result still not...