Cylinder Definition and 1000 Threads

I am currently working on my diplomatic work at university, with the topic: "Topology optimization of mechanical components in a vehicle's internal combustion engine using finite element analysis." More specifically, I am focusing on the aluminum engine block of a V6 engine. I designed the...

There is a cylinder which is held by a rope, inside a pipe. Fluid is flowing (laminar) in the direction of Q. I'm trying to calculate the velocity profile in the gaps between the pipe and cylinder, using Navier Stokes. First question is, if ##\frac{R_1-R}{R_1}<<1##, which means the gap width is...

Consider a tube closed at both ends. An air compression pulse (e.g. Gaussian) bounces between the ends; let us assume nearly lossless propagation and reflection, and no group delay distortion. At any instant, the elevated pressure around the pulse causes the cylinder to bulge slightly according...

This Instructable shows how to make a mouthpiece and reed for a toy wind instrument. https://www.instructables.com/Tiny-Tootophone/ (Warning: The article starts with a closeup profile of a middle-aged man's mouth and chin, with a raggedy unkempt mustache and beard that some viewers may find...

Hi. Lets say i have a cylinder, capped at both ends. It is cut in the middle and, say a titanium foil of 15 um thickness is pressed in between the 2 halves creating 2 spaces. It is pressed fairly hard, and a soft grip, "perfect" seal is created in someway but not right at the inside of the...

Hi all. Let me preface this by saying that I have no formal education in physics so I apologize if there is any information that I left out. Please comment with questions and I will try to answer them to the best of my ability. The cylinder has a mass of 30 lb, is 6 feet long, and has a...

TL;DR Summary: Resonance of a cylinder/tube with a hole in the center The Science Museum of Minnesota has this really cool xylophone hanging from the ceiling, named "Seismofon": There is a computer connected that receives almost-real-time seismic activity, and it uses that information to...

Is it possible to solve this without knowing the radius of the cylinder? My initial thoughts were that the energy required to stop it would be the sum of its rotational and translation kinetic energy, but I'm not sure it can be calculated without knowing the radius.

Firstly I figure out that there is a point where the temperature of the gas is the hottest and beyond that no more amount of heat is necessary, descibed as following inequation:

Hello I want to find distribution of temperature, and stress in cylinder with inner and outer temperature and pressure , I used linear elements with 3 nodes and wrote matlab code, moreover I want to solve that coupled but I have problem in first and last point because those have something like...

Flux equals dot product of Area Vector and the Field vector. So the areas are 3. The projection of cylinder (shadow of cylinder). It's flux is E2HRcostheta. Then remaining two circles have flux Eπr²sintheta each. But I checked my solution book and they have considered only half areas of the top...

A few months ago, our teacher gave us a problem regarding cylinder motion. He asked us to calculate the acceleration of a cylinder that's acted upon by a force F at an angle theta due to the x axis. Now, for some reason, he told us that the cylinder would rotate. Now, I'm not sure if he supposed...

FOr this, Use alternate coordinate system With ##ȳ##-axis parallel to incline and ##x̄##-axis parallel to the x-axis. Kinetic energy using this alternate coordinate system is ##T = \frac{1}{2}M\dot x_p^2 + \frac{1}{2}mR^2\dot \phi^2 + \frac{1}{2}m(\dot x̄^2 + \dot ȳ^2 + 2\dot x̄ \dot ȳ...

Writing from Cuba. This is canoeing: There are multiple causes for it but the one I'm interested in is when it is caused by directional air flow (AKA wind). If a breeze is blowing across my stogie from the same direction for an extended duration, one side will burn down much more than the...

TL;DR Summary: related rates problem The radius of a cylinder is increasing at a constant rate of 3 meters per minute. The volume remains a constant 1115 cubic meters. At the instant when the height of the cylinder is 44 meters, what is the rate of change of the height?

Doesn't friction always oppose the motion? From the clockwise rotation here, shouldn't the cylinder be moving to the right? so why are the acceleration and friction in the same direction to the right, and in the same direction as the motion? (attached image for reference)

Not clear how to proceed. Does the cylindrical surface of the ungula need to be considered?

Hello, For the mechanical system below, i'm trying to understand the relationship between cylinder applied force and radial force. The system consists of a shaft which is held in-place by a bushing. The shaft is connected to an air cylinder via a linkage. The air cylinder is on a fixed pivot...

(ΔSA/ΔD) = 2πHΔD Something is wrong I guess as I get wrong value.

There is a new video regarding an old thread we had here: https://www.physicsforums.com/threads/marble-spiralling-inside-a-cylinder.521152/

Why it said that angle between r and F is 30? I guess it should be 120 degrees... Am I wrong?

I am not sure if my report is complex enough as it should be at the undergraduate level preferably based on the requirements for it and it feels like it's all over the place as of now.

I have an ideal gas in a cylinder with a massless, frictionless piston, and the gas starts out at To, Po, Vo. The system is adiabatic. Initially, the gas is in equilibrium with an external pressure, also at Po. I initiate an irreversible process by instantly dropping the external pressure to P1...

Q: Why is 2.4-L referred to as the maximum volume instead of the displacement volume in Example 9-60? note: maximum volume = V1. displacement volume=V1-V2 reference： displacement volume 9-60 9-153 9-164 9-167

Why did he give torque number 4 zero? It's not touching the axis of rotation and the angle 90 degrees between them. I get this: ##\tau## = 1 - 0.8 - 0.4 + 0.4 = 0.2 (C.C.W)

Thank you guys for taking the time to read this - I'm decently struggling with first year and need some tips on how to properly conceptualize problems and learn what the right approach is on certain problems. Have a wonderful day, again thank you for checking this post out!

Well, it's been nearly 10 years since my last post, and it's been about that long since I've thought about ideal gases, so here we go :smile:. Description of Setup I have a system that uses compressed gas cylinders as a source to slowly purge an optical payload. The source is 12x compressed...

Given that there is a cylinder rolling without slipping down an incline, the method I was taught to represent the KE of the cylinder was: ##KE_{total} = KE_{translational} + KE_{rotational}## ##KE_{total} = \frac {1} {2} mv_{cm}^2 + \frac1 2 I \omega^2## Where "cm" is the center of mass, and...

Hello. For a project I am working on I need to draw a template of a "curve of intersection" of a plane (B) intersecting a cylinder at a "compound angle".. I do not know the correct terminology so I added a sketch of what I wish to achieve. If it is not understandable please say so and I will...

im learning thermodynamics and currently in a lesson about thermal processes. one process has constant pressure and before diving into equations or any proof the book provides a figure of a gas cylinder. the cylinder has a movable piston/lid on one side. the book then says "...and the piston end...

Hi everyone, I'm trying to set up a surface neutron source on the surface of a cylinder defined as a macrobody (RCC) and used also to define cell of the system. My aim is setting up a surface source where I'd like to give a specific spectrum (and DIR) at each surface defining the cylinder...

The correct answer to this problem is: ##\sigma = \varepsilon_0E\frac{\varepsilon-1}{\varepsilon}## Here is my attempt to solve it, please tell me what is my mistake? ##E_{in} = E_{out} - E_{ind}## ##E_{ind} = E_{out} - E_{in}## ##E_{in} = \frac{E_{out}}{\varepsilon}## ##E_{ind} = E_{out} -...

a=2/3*g*sin(25*(pi/180))=>a=2.8507 m/s^2 vf=vi+at=>vf=0+2.8507*1.50=>vf=4.2760 m/s So the translational motion of the cylinder is 4.2760 m/s. 4.2760=R*w w=134.04 rad/s PE=mgh=>PE=215*9.8*.108=>PE=227.56 J PE = KE at the end of the roll because of energy conservation. 227.56 =...

Hi, I want to solve the problem by method of mirroring and by using the electric field by doing superposition and then adding them up to use in Lorentz law to get the force. I have attached a figure that represents the problem. How do I know from the figure that $-p_l$ is from the...

For one of our projects we are at present using quite large amounts of gas & oxygen. What I was trying to figure out was how to calculate the total available amount of gas in a cylinder (be that either Propane/Oxygen or Propylene (Propene)) and then to determine whether or not -given a certain...

For part a: I know that linear charge density is the amount of charge per unit length, and we are given the volume charge density. Since we are given the volume, we can obtain the length by multiplying the volume by the cross sectional area, so C/m^3 * m^2 = C/m. The cross sectional area of a...

How can I determine the downward force of the rod with the given cylinder pressure and mechanical linkage? Do I sum my moments about the pivot? I calculated M=950xCOS(75.732)x7.81 + (X)SIN(63.414)x9.4 which resulted in 1828lbs. I get 217 lbs which does not seem right.

I am stuck at A, how do you calculate the motion of the air? I know ρ=m/V but what is the mass of the air, or I got that question wrong? Thanks

Hello, I am wanting to wrap a coil of wire around a tube, suspend an iron cylinder in the tube, energize the coil, and have it be able to suspend around 500 pounds on the iron cylinder. I was playing around with some online calculators for coils, and didn't really get anywhere, so I figured I...

I'm not sure where to start...

I am trying to solve a problem where we have to find the maximum angle before a cube starts sliding when said cube is placed inside a spinning hollow cylinder (the cylinder is placed horizontally). The radius of the cylinder is 0.4 m, the coefficient of static friction between the cube and the...

Figure: I have calculated the density of the cylinder: ##5479,0\, \textrm{kg}/\textrm{m}^3##. Attempt at a Solution: $$d=0,12,\,\, L=1,1,\,\, D=0,122,\,\, e=0,002,\,\, c=0,02,\,\, b=0,4,\,\, a=0,7$$ $$\omega =100\, \textrm{rpm}=10,472\, \textrm{rad}/\textrm{s}\quad e=0,122-0,12=0,002$$ We...

I'm making a device that will tilt a 500# load 20 degrees. Going to consist of a hinged 24" x 24" platform (that the load sets on). The platform will tilt to the right(clockwise) according to sketch. The upright post that the cylinder is attached to could be any length. The cylinder will...

If you want to make a cylinder of for example 4 mm thick steel but you just have 2 mm sheet available to roll into a cylinder and weld it. If you then roll 2 cylinders with 2 mm wall thickness and make sure one is the right size for a interference fit over the other and then heat the larger one...

My current spaceship design with several ring habitats (6 in my case) works well for worldbuilding purposes, in the sense that the reader should easily be able to tell what types of facilities can be found where on the ship. That’s because the rings distinguish themselves from each other by...

I solved laplacian equation. and got the solution of V(r, phi) = a. +b.lnr + (summation) an r^n sin(n phi +alpha n ) + (summation) bn r ^-n sin( n phi +beta n)

Summary: A 5.0- cm -diameter cylinder floats in water. How much work must be done to push the cylinder 11 cm deeper into the water? F =Aρgx A 5.0- cm -diameter cylinder floats in water. How much work must be done to push the cylinder 11 cm deeper into the water? F =Aρgx x being the...