Tube Definition and 886 Threads

Hello, As we know, when you blow over the neck of a bottle, it resonates at a certain frequency. I want to build a cylinder that will resonate at a certain wind speed: 4 mph or about 1.78 m/s I definitely know how to find the resonant frequency of a cylinder. However, I'm not sure what...

Hey folks, here is a question: A thread of mercury of length 15cm is used to trap some air in a capillary tube with uniform cross-sectional area and closed at one end. With the tube vertical and the open end uppermost, the length of the trapped air collumn is 20cm. Calculate the length of the...

Test Tube Yeast Evolve Multicellularity The evolution of multicellular organisms have always been poorly understoond. Recently, scientists managed to demonstrate the evolution of multicellularity in yeast cells through artificial selection.

Hi all, Sorry if this seems trivial but I think I may have managed to confuse myself and could do with some help. I need to specify a tape heater power output for a small rig through which water will be heated to 200C. Having gone through the Q=m*cp*ΔT equation where: m = 0.1658x10-3...

I want to propose an interesting thought experiment, but don't want to A/ make a bigger fool of myself than I normally do B/ well that's about it really The premise behind my experiment is that rising steam does not lose thermal energy if we ignore thermal losses both radiative and conductive...

Hello there! I study communications engineering and got really fascinated by magnetic fields. I started to do my own bit of "research" or "further understanding" how magnets work, how the field is influenced and what can the field influence. After doing so I got fascinated by particle...

So, For FIRST FRC robotics, We have made 3 different objectives to research, and I decides to start with the projectile. We need to launch an 8" diameter foam basketball into a goal that's 18" diameter. We can be anywhere from 3feet to 54 feet away. We had an idea of using the classic...

I want to be able to figure out how sound works down a tube. Leading to me being able to calculate where I should place slits on a tube and at what size given a tube diameter (and length if necessary) to make a good shotgun mic tube. The slits allow wave cancellation. So there is some...

Appreciate any comments regarding the following:-(I am not an Engineer) We intend to launch (Mekong River) the subject steel tube (12mtr pipe welded together using the collar sleeve method) Flanges / gasket will be fitted at both ends of the tube. The flanges will have a 1" valve at the top and...

Every one who can answer these 3 questions, help me to understand Physics better.It also help other people who are interested in physics. 1-Imagine you want to drink a glass of water with a straw.Where is better to put the tube for drinking water better? 2-Boats which have engine lurch and the...

A large open tank, shown below, contains water at a height H. The water is allowed to flow out through a pipe whose cross-sectional area is A. The pipe has a nozzle at the end, whose area is a. Assuming frictionless flow, determine (i) the height h to which the water rises in the piezometer...

Given the following: 1. A hollow tube 0.875" O.D. with a 0.750" I.D. 2. A clam shell circular clamp 0.875" wide. 3. Two No. 8-32 screws securing the 2 halves of the clamp onto the tube. 4. Screws are torqued to 20 lb-in. I am looking for how much weight that can be supported by the...

Hey guys, Im designing a system where water flows through a copper tube or coil where it is heated and sprayed out the other end. My question is, how does the length of the tube/coil play a role in this heat transfer problem? What I would like to do is pass the water through the inlet at a...

Well, they might be more of a tendency but in a nutshell, I have a water source heat pump unit that we removed and stored. It is now being exposed to freezing temps. Just NOW i realized that I never looked into freezing issues with the coil. I am curious if water has a place to expand, aka...

Homework Statement A constricted horizontal tube of radius r1 = 4.00cm tapers to a tube of radius r2 = 2.50cm. If water flows at a speed 3.50m/s in the larger tube, (A) find its speed in the smaller tube. (b) Find the water pressure difference ΔP=ΔP1-ΔP2 in kPa and in atm. Homework...

Homework Statement We have a U tube, like this one: With the a nonviscous, incompressible fluid at height h at equilibrium. We're interested in finding the frequency of small oscillations about the equilibrium. The tubes have area A (though I'm guessing this falls out in the end) and are L...

I am currently using garder tubes to measure the viscosity of a material (mainly adhesives and some wax) in the process of manufacturing Newtonian as well as non-Newtonian materials. I am looking for an alternative method that is less qualatative in an attempt to decrease the defects per...

Homework Statement I had a Physics lab with the following setting: A signal generator is connected to a speaker which is located on one end of a tube. This creates the sound wave. The tube is open on both ends. A micro is movable along the tube and it is connected to an occsilator which...

- A tube around a manifold embedded in Euclidean space is a manifold with boundary. Is the tube always orientable? - Does the topology of the boundary determine the topology of the tube?

Anyone know how to use the temperature gradient in a thick-walled tube to calculate the stress seen throughout the wall (radial stress gradient)? I've been scouring the internet for a good explanation but haven't found one.

Homework Statement The U-tube in the figure is sealed at both ends. It contains a gas in A, another gas in B, and mercury in C. The heights of the mercury in the two arms are as shown. The density of mercury is 13.6 g/cm3. If the pressure in A is 1 × 10^4 dyn/cm2, the pressure in B is...

Hi, I am trying to build a high-speed flash, based on the PCB from a disposable camera, with the aim of producing a flash with a duration of 5μs - 20μs. The main circuit works, firing four xenon flash tubes from a 330v capacitor (charged to 300v). This is the schematic for the disposable...

We were presented with a task of calculating the temperature of absolute zero experimentally. To do this, we were given a capillary tube with one end sealed. Then we heated the tube up in a bunsen burner and quickly put the open end in some cooking oil. The oil was sucked up as the gas within...

Homework Statement The horizontal pipe, shown in the figure, has a cross-sectional area of 40,0 cm^{2} at the wider portions and 10,0 cm^{2} at the constriction. Water is flowing in the pipe, and the discharge from the pipe is 6,00*10^{-3}\frac{m^{3}}{s} (6,00\frac{L}{s}). The density of...

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 A u-tube of uniform square cross section has electrodes sealed inside the upper and lower walls of the horizontal section. The two arms of tube being vertical. The tube is partially filled with liquid sodium and a direct current is passed between the electrodes. A uniform...

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...

I want to build something using 3 tubes that are cardboard here are the demtions. Length is 9 feet and 3 inches the diameter is 2 1/4 inches and the width is 1/4 inch. Does anybody know how to find the PSI and if so is there a mathmatical equation for it?

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...