Cylinders Definition and 254 Threads

Homework Statement Three cylinders are placed in contact with one another with their axes parallel. The radii of the cylinders are 3, 4 and 5 cm. An elastic band is stretched around the three cylinders so that the plane of the band is perpendicular to the axes of the cylinder...

Could anyone explain the method of finding the circumferencial and longitudinal stress for thick cylinders?

Homework Statement Two pulleys are mounted on fixed axles that have negligible friction. The small pulley has a moment of inertia of 9.0 kgm^2, and is made of up of two cylinders wielded together, one of radius 7.0 cm, and one of radius 15.0 cm. The large pulley has a radius of 41.0 cm, and a...

Homework Statement A long cable consists of two coaxial conducting cylindrical shells of radius b and 3b. The region with radius ##\delta## between b and 2b is filled with a material of relative permittivity ##\epsilon_r \neq 1## and relative permeability ##\mu_r = 1##; the remaining space...

Homework Statement A 185 m3 room must be filled with 4 ppm NO2 gas (Nitrogen dioxide). The gas comes in cylinder of 200 bar and 50 liters (20x50 = 10,000 liters) and 50 ppm. How many cylinders are needed? Homework Equations 1 ppm = 1/1,000,000 (parts per million) (can't think of more...

Homework Statement Expanded from Griffith's (3rd ed) #2.47 Infinitely long wires parallel to x-axis carrying ±λ charge densities intersect the y-axis at ±a. A) Calculate V(x,y,z) if V(0,0,0)=0 B)Show that the equipotential surfaces are circular cylinders. Locate the axis and calculate...

Homework Statement Two long, hollow, and coaxial conducting cylinders, with radii a and b>a , are lowered into a tub of fluid with dielectric constant \kappa . A voltage V is applied between the two cylinders. The fluid is observed to rise up some height h into the volume between the...

Homework Statement Two cylinder shaped vessels of cross section A are fixed vertically to a trolley, which was initially at rest. The two vessels are connected with a thin horizontal tube which is equipped with a tap. The distance between the axes of the vessels is L. The vessel in the left...

Hi, I've attached a word document with my problem since I've used the Mathtype program (sorry, I didn't quite know how to use the tools on this forum), hope you don't mind :)

Homework Statement Homework Equations mgh=\frac{1}{2}mv^2+\frac{1}{2}Iω^2 The Attempt at a Solution I used conservation of energy, and found that the final velocity of the center of mass is independent of the object's mass, so in both cases: v=\sqrt{gh} . Therefore, the ratio is 1. However...

For an axisymmetric long tube, it is said that radial displacement is independent of axial coordinate. What is the justification for this simplification?. If u, v and w are axial , tangential and radial displacements then u=u(x,θ,r) v=v(x,θ,r) w=w(x,θ,r) Where x,θ,r are polar coordinates...

I have a domestic LPG cylinder. Composition - 20% Propane and 80% Butane. Temperature - Around 30-35 deg C. I wanted to know the temperature of the gas inside the cylinder or in other words, if i take gas out directly from the cylinder without using pressure reducing regulator, what will...

Hi there, Currently I'm working on a complicated project. I work for a packaging machinery company. The machine I'm currently working on has a critical section which you would call the 'the heart'. Here we move a 800KG (1700 Pounds) bed up and down by 50mm (2 inches). On the bottom of this...

Homework Statement See image: http://s18.postimage.org/6ql2zlo2x/board_n_cylinders.png The Attempt at a Solution I know it says conservation of energy but I just wanted to do it in terms of torque and forces first. The reason I'm not sure about my answer is because I barely had to use more...

Homework Statement Three cylinders with the same size, density, and structure are piled on each other and on top of a rough surface. Find the minimum angle which the direction of the force acting between the cylinders and the rough surface makes with the vertical? The cylinders are stacked...

Homework Statement The ropes in the figure are each wrapped around a cylinder, and the two cylinders are fastened together. The smaller cylinder has a diameter of 10 cm and a mass of 5.0 kg; the larger cylinder has a diameter of 20 cm and a mass of 20 kg. What is the angular acceleration of...

Homework Statement What is V(P) – V(R), the potential difference between points P and R? Point P is located at (x,y) = (50.0 cm, 50.0 cm). Homework Equations V=-∫Edl flux=∫EdA=Q/ε The Attempt at a Solution My attempt is in the attached photo to illustrate that I have worked the...

Homework Statement A 75 gram ruler is evenly placed between two cylinders spinning clockwise on the left and counter clockwise on the right. The coefficient of friction between the ruler and the spinning cylinders is 0.2. You push the ruler to the right by 0.12 meters. It returns to you by...

Homework Statement Two coaxial cylindrical conductors are shown in perspective and cross-section above. The inner cylinder has radius a = 2.0 cm, length L = 10.0 m and carries a total charge of Qinner = + 8.0 nC (1 nC = 10-9 C). The outer cylinder has an inner radius b = 6.0 cm, outer radius c...

I'm trying to design a system in which one air cylinder (single piston) can reach 4 repeatable positions. Multi-piston cylinders won't work because I need fine adjustment in the position of each of the four stages. The four positions are at 0 inch, 1 inch, 2 inch and 3 inch. My idea was to...

We know that we calculate the volume of sphere by taking infinitesimally small cylinders. ∫ ∏x^2dh Limits are from R→0 x is the radius of any randomly chosen circle dh is the height of the cylindrical volume. x^2 + h^2 = R^2 So we will get 4/3∏R^3 Now the question is why cannot we...

Homework Statement Consider two infinitely long cylinders with radius a and b and currents: J = (Jo r)/a for r less than a -Jo for a less than r less than b Find the magnetic field in 1) r less than a 2) a less than r less than b 3) r greater than bHomework Equations The...

An open U shaped tube is initially partially filled with water (ρ=1000 kg/m^3). A 10 cm high column of oil (ρ=800 kg/m^3) is poured into the right side of the tube. What is the height of the oil above the water? I set the water and oil equal to each other. (800)(10)(9.8)=(1000)(H)(9.8)...

Hi All, I'm working on a Hydraulic Tire Curing Press Project.There are Hydraulic cylinders in many regions of the press.Steam @ 220 deg c is used to heat the tire to bring about vulcanization process.The press earlier supplied to the customer had thermal insulation problems due to which the...

Cylinders for Piston Engines go through a final process of grinding and honing to achieve a surface finish that is fine enough to prevent as much friction as possible yet rough enough for holding engine oil for lubrication between the Cylinder and the Piston. The required Surface Finish is...

Homework Statement A plank with a mass M = 6.30 kg rides on top of two identical, solid, cylindrical rollers that have R = 5.30 cm and m = 2.00 kg. The plank is pulled by a constant horizontal force Farrowbold of magnitude 5.00 N applied to the end of the plank and perpendicular to the axes of...

Homework Statement A plank with a mass M = 6.10 kg rides on top of two identical, solid, cylindrical rollers that have R = 4.10 cm and m = 2.00 kg. The plank is pulled by a constant horizontal force F of magnitude 4.80 N applied to the end of the plank and perpendicular to the axes of the...

Imagine two cylinders in which one cylinder in within another.(Please refer attachment) The annular space between the two cylinders is filled with air. The outer cylinder is provided with a substantially large cut out The inner cylinder is maintained at a temperature say 200 deg c I...

Homework Statement There are 2 coaxial cylindrical conductors. The inner cylinder has radius a, while the outer cylinder has radius b. There is no charge in the region a < r < b. If the inner cylinder is at potential Vo and the outer cylinder is grounded, we want to find the potential in...

Hi, I have a question. Suppose you have two concentric cylinders of radii a and b with opposite uniform surface charges, line charges or something to that effect. Now, I know (or was told) that the E-field between the two, that is for a<r<b, is equal to the field from the inner cylinder (radius...

Hello all, I would like to know if there are strain gauges out there that could be used for small cylinders. To describe the problem/design more thoroughly, I am trying to design (or purchase) a cylinder no bigger than 3mm. When the end of the cylinder is compressed (across the circular...

Homework Statement Two identical, uniform and rigid cylinders, each of radius a and mass m, are laid horizontally at rest inside a rigid box of width w. There is no friction acting at any of the four contacts. i) Draw a diagram for each cylinder showing the forces acting on it alone...

I need help with the attached exercise. Problem is not that I am not able to do it. You can find the field of an infinite cylinder with Gauss' law and then use that to find the potential difference. My solutions notes however do it in a slightly different way, still arriving at the correct...

Homework Statement Consider the steady flow between two long cylinders of radii R_1 and R_2, R_1 > R_1, rotating about their axes with angular velocities \Omega_1, \Omega_2. Look for a solution of the form, where \hat{\boldsymbol{\phi}} is a unit vector along the azimuthal direction...

Hi, I have been searching the web for hours now, and I have had some success, but I have not found everything I am looking for. The best thing I have found was a similar arrangement in Hibbeler’s Mechanics of Materials (hence the name of the thread). This had a short rod of aluminium in a vice...

ansys -- Boundary conditions for 2 cylinders and fluid i want to do a analysis in ansys in which a cylinder will rotate about a axis which is out side of the cylinder and this cylinder is also rotating about its own axis. cylinder is half filled with liduid. i want to do the stress analysis or...

Homework Statement A potential difference of 160V is applied across two col-linear conducting cylinders. the radius of the outer cylinder is 15 cm, the radius of the inner cylinder is 10 cm, the height of the two cylinders is 38 cm. a. How much charge is applied to each of the cylinders? b...

Hi there. I've got issues. Big ones. I need to simplify this crane structure, and calculate the strength on cilinder |c1c2| when applying a vertical load on the crane's hook. The purpose of this is to find how much of the strength is absorbed by the first cylinder (and possible the second one...

Homework Statement A long cylindrical boiler shell is 1.75 m in diameter and has a wall thickness of 12 mm. Treating the boiler as a thing shell, predict what internal pressures will produce yield in the shell according to the: (a) Rankine, (b) Max. Principal Strain, (c) Tresca and (d) Von...

I have attached both the question and the solution. I just have questions as to why the solution is the way it is (sorry if they seem stupid but, while I get how to do it mechanically, I don't understand the fundamental reasoning as to why anything is being done): 1) Why are we taking the...

Homework Statement A 60.0 kg person is stuck against the inner wall of a rotating cylinder. The radius of the cylinder is 10.0 m and the period is 2.00s. What is the minimum coefficient of static friction required to stop him from sliding? Homework Equations Fnet = (4m∏^2R)/T^2...

Homework Statement Two cylinders (radius R) start from rest and roll without slipping down ramps. They both have the same masses and moments of inertia. The ramps are both at the same angle. One cylinder (A) is directly on the ramp. The other (B) is hanging from two smaller cylindrical bits...

Homework Statement Find the volume of the intersection of the two solid cylinders x2 + y2 ≤ 1 and y2 + z2 ≤ 1. The Attempt at a Solution Apparently this is done most easily by cartesian coordinates. I have the integral: \int_{-1} ^1 \int_{-sqrt(1-x^2)} ^{sqrt(1-x^2)}...

Question: Two light cylinderical cans roll down an inclined slope. One is filled with water, which may be assumed to act without friction, the other is filled with ice which sticks to the insides of the can. Which attains the higher speed and by what factor? Solution: The maths of this...

frankly i don't know much about anti-matter or super conductors...i just read an into-level topic on anti-matter and had a thought. the main concern while developing an energy source is that its feasibility should be considered...right? and the problem with anti-matter is that it takes too much...

Homework Statement I managed to do part (i) and first part to (ii): Homework Equations U = Q + W The Attempt at a Solutionfor the first part: T/Tf = 1/(2 - y) for (ii): W = yVP Given: (3/2)R = Q/(nΔT), Q = (3/2)nR(ΔT) Therefore U = Q + W U = (3/2)nR(ΔT) + yVP But then, isn't U...

Homework Statement An oceanographer is studying how the ion concentration in seawater depends on depth. She makes a measurement by lowering into the water a pair of concentric metallic cylinders at the end of a cable and taking data to determine the resistance between these electrodes as a...

What are 5 ways to determine which of 2 identical cylinders is empty and which is full of gas if they are in space?

Hi, For single acting hydraulic cylinders, how can I specify I need pushing cylinder? Is there a specific name for push or pull cylinders? Please let me know how should I call Cylinders of type 1 and type 2. |----------------------| | || | |...

which is greater or are they equal: one cylinder with 2 radius and height 10, or one with 1 radius and height 20 I thought they would be equal because the first one is 4pi * 10 = 40pi and the second is 2pi * 20 = 40pi But my book says the first is greater. don't understand why