Cylinder Definition and 1000 Threads

I understand that a cylinder oriented vertically and bearing a load can be made more resistant to buckling by adding pressure to the (closed) cylinder. For example, an unopened can of soda pop can bear much more load than an opened soda pop can (I found a youtube video showing an unopened can...

Imagine we have a very tall vertical cylinder like a very elongated telegraph pole, that is rotating at 200 rpm about its long axis on near perfect bearings. Initially the cylinder is sufficiently far from a black hole, that differences in gravitational time dilation between the top and bottom...

I quote a question from Yahoo! Answers I have given a link to the topic there so the OP can see my response.

Homework Statement Hi everyone, I'm working on an assignment and am totally stumped by this question: A horizontal cylinder is heated electrically. The cylinder is supplied with a current at a DC Voltage. Using the data supplied and allowing for both natural convection and radiation...

Where I work, we use a single acting hydraulic cylinder to raise a tank filled with sludge. After emptying it, it has to be brought back to it's original horizontal postion. This is done using the weight of the cylinder and takes a lot of time (about 15-20 mins). Can you suggest something to...

Homework Statement We have high cilinder with height h a filled with water up to the height L<h and air in the rest. We hit the cylinder and listen to the frequency of its sound. How can we determine L in function of h, the frequency of the noise, the speed of sound, ... Homework...

Homework Statement I don't have the exact problem statement but I remember the data given. I have a cylinder suspended in mid-air.The question asks to calculate the wind speed required to keep the cylinder in this position. The cylinder is of height h and diameter d. The pressure of air is...

Thanks again to those who participated in last week's POTW! Here's this week's problem! ----- Problem: A right circular cylinder is inscribed in a cone with height $h$ and base radius $r$. Find the largest possible volume of such a cylinder. -----

Homework Statement A thin, cylindrical copper shell of diameter ds = 2 cm has along its axis a thin metal wire of diameter dw = 7.50 x 10-03 cm. (as shown in the diagram below.) The wire and the shell carry equal and opposite charges of 6.35 x 10-09 C/cm, distributed uniformly. What is the...

Homework Statement In Cartesian coordinaate system, we describe the rotation of a cylinder. The axis of the cylinder has the same direction as the basis vector e3. Angular velocity is described by vector w = 2e1 - 5e2 + 7e3 rad/s. I must find the velocity vector (v) of a point P that is...

Say you have a cylinder. The cylinder is 6 inches in diameter and 10 feet high. The cylinder has a floor at the bottom and is open at the top. The cylinder is full of water. How much pressure is exerted on the floor of the cylinder? Is it simply the weight of the water in the...

can anyone explain why is that noted?Most of them says that it denotes the error.why there should be an error in the instrument.Can't we make an instrument free of error?confused.

I'm trying to verify that some hyperlastic models I got from uniaxial data work in ANSYS. To do so, I am using a one-element uniaxial simulation (which works perfectly), and then I also wanted to do a simulation of another type of problem that I could solve analytically, to compare the results...

Hi, Homework Statement Suppose I have an infinite cylinder with radius R, axis along the z axis and constant magnetization M\hat{z}. I wish to find the magnetic field everywhere. (This is not a HW question per se, yet thought I might get some comments on my attempt at solving it...

Homework Statement A cylinder rolls without slipping down a hill. It is released from height h. What is its speed when it come down? The cylinder mass may be completely concentrated on the radius R, which is the radius of the cylinder. http://i.imgur.com/Ge3x1nu.png The Attempt at a...

θHomework Statement The attached diagram depicts a sphere with several variables: the height of the cylinder, the radius of the cylinder and an angle. All that has been given to me is the hypotenuse of a triangle used. Homework Equations To my knowledge I was told to use 2sinθcosθ=sin2θ...

Homework Statement Homework Equations The Attempt at a Solution I have no idea on this one. I can't understand what happens when some portion of the cylinder is earthed and other is maintained at 110V. The potential of the earthed portion is 0V but how does that even help me...

Homework Statement An ideal gas is stored in a cylinder whose volume is unknown. Part of this gas is transferred to another cylinder whose volume is 300 cm3 and pressure is 790 mmHg. The mass loss caused the pressure in the first cylinder to decrease from 650 to 630 mmHg. Considering that all...

Homework Statement 0.03m^3 of air is contained in the spring-loaded piston-cylinder device. The spring constant is 875N/m and the piston diameter is 25cm. When no force is exerted by the spring on the piston the state of the air is 2250kPa and 240C. This device is now cooled until the volume is...

Homework Statement Ok so I have to do this lab that I just started today, I have a link to the entire assignment so you guys can see everything here: http://www.bclearningnetwork.com/LOR/media/ch11/course_files/Unit_Labs/Unit_1_density_lab.pdf I asked my teacher how I'm supposed to do it...

Homework Statement A long hollow nonconducting cylinder (radius R= 0.060 m, length L= 0.70 m) carries a uniform charge per unit area of σ= 4.0 C/m^2 on its surface. Beginning from rest, an externally applied torque causes the cylinder to rotate at constant acceleration α= 40 rad/s^2 about the...

Homework Statement What must the ratio of height to radius of a cylinder be so that every axis is a principal axis (with the CM as the origin)? Homework Equations Moment of inertia tensor. I need I_yy = \sum m *(x^2 + z^2) The Attempt at a Solution I calculated I_zz = MR^2 /12...

Homework Statement We have some uniformly polarized cylinder with some polarization P\hat{z} . The The cylinder's center is on \hat{z} and it's on the xy surface. The cylinder has radius R and height d where R \gg d . If we were to ground the xy plane what would the electric field...

Homework Statement (see attachment)Homework Equations The Attempt at a Solution Can I use the instantaneous axis of rotation for this question? I placed it at the point of contact of cylinder and the ground. Moment of inertia about it is: ##4mR^2/2+4mR^2+mx^2=6mR^2+mx^2##, where m is the mass...

Homework Statement Find the electric field at a point on the x-axis due to a uniformly charged, hollow cylinder. The x-axis is parallel to the cylinder and goes through it's centre. One end of the cylinder is located at the origin. Homework Equations R = radius of cylinder Q = charge on...

whats the the Rayleight number formulae of vertical cylinder in natural convection?

Homework Statement A cylinder has a diameter of 2 inches. One end is cut perpendicular to the side of the cylinder and the other side is cut at an angle of 40 degrees to the side. The length at the longest point is 10 inches. Find the volume of the sample. I believe this is what it would...

how can I create a spheric glass ball or a closed cylinder containing a solvent as acetone or methanol? the ideal would be without air bubble inside and diameter in the range of 2-4 mm thanx max

Homework Statement An open-topped cylinder is to have a volume of 250 cm3. The material for the bottom of the pot costs 4 cents per cm2, and the material for the side of the pot costs 2 cents per cm2. What dimensions will minimize the total cost of this pot? The Attempt at a Solution $$...

let say a cylinder(steel) is 6 cm diameter and length of 3.5 cm length. and is heated to 1000 degree c. in a room of free air and room temperature of 20. will convective heat transfer dominate? it radiation is negligible? what would the convective heat transfer be? what power(watt)...

I've tried googling this but I can't find the answer. I'd like all of the common 3d shape equations if someone has them. THEY HAVE TO BE SOLVED FOR Z so they can actually be graphed on a 3d graphing calc. For some crazy, crazy reason, these equations are never listed solved for z or, don't even...

I am thinking about solar water heating. The way that the system gathers heat is by moving any heated water into into the cylinder where it rises to the top and cold water is taken from the bottom of the cylinder and moved through the heating panel. Because the hot water will always rise...

Homework Statement A steel cylinder of diameter 8cm and length 12cm is initially at 600°C. It is placed in oil at 20°C for rapid cooling, for case hardening of the surface layer. The value of h is 60W/m2 K. Use the numerical method. a. Determine the time in which the maximum internal...

Hi there, 2nd year student, absolutely stumped on this don't even know where to begin. [I]"Determine the vector potential due to an infinite cylinder of radius, R, carrying a uniform current density, j. Use this to describe the magnetic field inside a current carrying wire I am using...

Homework Statement Homework Equations The Attempt at a Solution Not sure what they mean by general superposition of solutions...Do i use D'alembert's solution whereby I assume initial velocity = 0, and therefore: z = z(θ-ct) + z(θ+ct)

Homework Statement A piston-and-cylinder device contains 5 kg of water initially at 150◦C and 0.20 MPa. The frictionless piston is then pushed slowly in an isothermal process until the volume of water becomes 10% of its initial value. Calculate the heat and work exchanged between the device...

Homework Statement A cylinder weighing 30lbs is initially at rest on a horizontal surface. There is a spring attached directly below the center, 2ft away from the center point o, pulling to the right horizontally. There is a string attached to the center and to a mass (around a pulley...

What is the relation between the pressure that is exerted on the internal walls of a cylinder and the characteristics of a flow of water running inside it? Let's assume that the flow velocity is constant and that we have an inviscid flow of pipe flow type. Furthermore let's assume that the...

In the figure below we have 2 hollow cylinder conductors. The red conductor has radius R1 and negative charge (Q1). We then introduce the blue conductor (radius R2), first connected to the Earth by a conductor thread. Then we disconnect the thread making the blue conductor charge be positive...

Homework Statement A hollow metal cylinder has inner radius a, outer radius b, length L, and conductivity sigma. The current I is radially outward from the inner surface to the outer surface. Find an expression for the electric field strength inside the metal as a function of the radius r...

Homework Statement Rotating with angular velocity ##ω_0## solid homogeneous cylinder of radius ##r## placed without starting forward speed at the bottom of the inclined plane, forming an angle ##\alpha## with the horizontal plane, and starts to roll in up. Determine the time during which the...

Homework Statement Massless and inextensible string is wrapped around the periphery of a homogeneous cylinder of radius R = 0.5 m and mass m = 2 kg. The string is pulled straight away from the upper part of the periphery of the cylinder, without relative slipping. The cylinder moves on a...

A question I was doing asked to find the equation describing the surface of water placed in a cylinder rotating about its central axis. The question asserts that in the rotating frame, the water is at rest, and centrifugal force and the gravitational force of a volume element are perpendicular...

Hi there. I have just been doing some reading on manifolds, and I'm finding some of it hard to grasp. An example we were given was of the infinite cylinder and how to construct its map, and that it would be with one chart. the reading initially says that we can use θ \in (0,2pi] and z \in...

Hi everyone, I have an exercise and i don't understand something in the solution: A cylinder of diameter d floats with l of its length submerged. The total height is L. Assume no damping. At time t = 0 the cylinder is pushed down a distance B and released. What is the frequency of...

Hello! How do I calculate the maximum possible rotational speed of a thin walled hollow cylinder? In other words, at what rotational speed will it explode due to centripetal force? This picture shows the plane of rotation...

A smooth circular cylinder of radius $$b$$ is fixed parallel to a smooth vertical wall with its axis horizontal at distance $$c$$ from the wall. A smooth uniform heavy rod of length $$2a$$ rests on the cylinder with one end on the wall in a vertical plane perpendicular to the wall. Show that its...

Homework Statement Hey! We have a copper pipe, which has a outer diameter y = 4.1 mm and inner diameter x = 4.0 mm Length of the pipe is L = 120m and resistivity of copper is ρ = 1.7 * 10^{-8}\Omega Homework Equations Resistance is R = ρ * \frac{L}{A} The Attempt at a...

Hey, I'm trying to come up with a question, be it a simple one, where a mass of ideal gas (Oxygen) is bound in a cylindrical tube and has a circular piston applied to it - so that the gas becomes pressurised. Once the gas has been pressurised it will gain a certain temperature, which is the...

I can't seem to make a cylinder that is circular on the yz axis and runs length wise down the x. Evgeny.Makarov do you know how to accomplish this? I tried using \filldraw with the arc command to round and shade the circular sides but it wasn't going so well.