Cylinder Definition and 1000 Threads

Homework Statement Homework Equations Volume for cylinder = Pi (r)2 h Optimise : 1. make the best or most effective use of (a situation, opportunity, or resource). 2. rearrange or rewrite (data, software, etc.) to improve efficiency of retrieval or processing. The Attempt...

Hello :) I am an engineer and I am trying to analyse a system which basically contains a cylindrical body free-falling through a body of static water beginning with zero velocity. I am ultimately trying to find what the velocity of the object would be at a depth of 20m. In order to do this I...

Homework Statement Water is contained in a cylinder fitted with a frictionless piston (figure shows that atmospheric pressure acts on piston from above). The mass of the water is 0.45 kg, and the piston area is 0.186 m2. Initially, the water conditions are 110oC and 90% dryness fraction, and...

Hi all. I'm currently working on a problem where I have to determine individual and overall heat transfer coefficients for a vertical cylinder with water flowing on the inside and steam on the outside (parallel flow), studying the cases of free and forced convection. I only have four...

Homework Statement I have posted the given question and conditions in the attached image Homework Equations (Q_enclosed/ epsilon_0) = closed integral (E-field) dA Q_encolsed = p*A V(r)= -Int_(from origin to r) (E-field(r'))*dl' The Attempt at a Solution [/B] a) E=0------>For r<a...

Homework Statement A cylinder of mass M and radius r is at distance l0 from the edge. mass m is hanging from a rope. no friction at the weightless pulley. the cylinder starts rotating without sliding. What's the acceleration of the COM of the cylinder. What's the velocity of the COM of the...

Hello, friends! The tridimensional version of the Biot-Savart law says that the magnetic field generated at the point ##\boldsymbol{r}\in\mathbb{R}^3## by a tridimensional distribution of current defined by the current density ##\boldsymbol{J}##...

Folks, I have an FEA applicaton where I need to apply a total force acing vertically upward but to be distributed over half a cylinder (1st n 2nd quadrant). This half cylinder i representd by a set of nodes between 0 \le \theta \le 180 The force will be maximum at 90 degrees and 0 at 0/180...

Hi, I'm trying to work out how much strain potential I can produce in a cylinder but I want to know how much is stored for any specific part of the cylinder. The problem then is this: I have a cylinder of original dimensions r and h, where h is the original height and r is the radius. It is...

Homework Statement The cylinder x^2 + y^2 = 1 intersects the plane x + z = 1 in an ellipse. Find the point on the ellipse furthest from the origin. Homework Equations $f(x) = x^2 + y^2 + z^2$ $h(x) = x^2 + y^2 = 1$ $g(x) = x + z = 1$ The Attempt at a Solution $\langle 2x, 2y, 2z \rangle...

hi all, somewhat related to physics. i embark on a new project, to build my own TV lift using pneumatic lift. anyone have any links to places that carry thin OD (~3/4") that has about 24" stroke and can lift ~25-30lbs? i find spending $600 on a electric TV lift absurd, with my metal stock i...

Evening all, I've recently undertaken a project where my roll is to analyse the suspension of a mountain bike. The suspension unit in question is a Rock Shox Monarch RT3. To give a brief summary: The shock uses compressed air as the spring, the pressure is adjustable via an air valve. The shock...

Homework Statement I just want to focus on the divergence outside the cylinder (r >R) Homework Equations The Attempt at a Solution For r > R, I said ∇ * E = p/ε But that's wrong. The answer is ∇ * E = 0 I'm confused because there is definitely an electric field outside the cylinder (r...

Homework Statement An ideal gas enclosed in a vertical cylindrical container supports a freely moving piston of mass M. The piston and cylinder have equal cross sectional area A. When the piston is in equilibrium, the volume of the gas is V0 and its pressure is P0. The piston is slightly...

I am trying to calculate the spring rate for an air filled shock-absorber, however I am struggling to get my head around the change non-linearity at the start of compression. Obviously if the shock is fully extended then it will be applying no compressive force to the chassis so that accounts...

Homework Statement The figure shows a cylinder of mass 3.5kg, radius 4.4cm and length 10.2cm with 105turns of wire wrapped around it lengthwise, so that the plane of the wire loop contains the axis of the cylinder. What is the least current which while flowing through the loop will prevent the...

Homework Statement Consider air expansion inside a cylinder. Assume that the volume and initial pressure is 1 ft^3 and 1500 PSI ABS respectively. If the expansion process is reversible and the path is given by P.V^1.4=constant. Calculate the total work done by the gas to reach the final volume...

Hi! Suppose I have a cylinder of pyrolytic carbon graphite (strong diamagnet) that's vertically placed inside a hollow cylinder made out of approximately radially magnetized neodymium. Assume the graphite is frictionlessly held into place vertically somehow (so gravity can be ignored) but can...

Hello world, I have to select an hydraulic cylinder to counter-balance a force. For that purpose I need to know the force that my hydraulic cylinder must exert. Typically I would use the horizontal part of F2, but being that force with diferent degrees, doen't my friction play an important...

hi, i am an aeronautical engineer student in need of some ideas for my groups mechanical design project. our project is to design a helicopter winch/hoist that meets the following requirements: 1. is atleast 150ft long 2. max 350kg load at a rate of 3ft/sec 3. (deeper into design) has a safety...

I'm not sure whether this is the correct place to post but here goes :wink: I'm trying to determine how long my argon gas cylinder will last when I am using it for tig welding. The cylinder is supplied with 1.32m³ (1320L) of Argon at 137 bar (13.7 MPa). If I set my regulator pressure to 0.5...

Homework Statement We have a very long ferromagnetic cylinder with square cross section, with side length a. Cylinder is homogeneosly magnetized over his volume so that the magnetization vector is parallel to the axis of cylinder. Cylinder is in vacuum. Find the current appeared in the cylinder...

I am having some trouble finding out the Maximum shear stress, I worked out my hoop stress and axial stress for the thin cylinder theory but the radial stress i am having issues with. If the applied pressure is only internal then would the radial stress be 0.

Hello there I'm having real difficulty with a problem to do with air cylinders and would really appreciate some help. I'm attempting to replicate the human breathing system in a simplistic form but I'm having trouble calculating the force required to provide the correct airflow rate at the...

Hello, I'm having issues with pressure calculations that I'm using for a double acting pneumatic cylinder. In my application, I start the piston near one end of the cylinder with both sides closed, and then move the piston towards the other end. At each point, I update the pressure, volume, and...

Hi , I came across a problem ,I've search a lot but couldn't exactly find the solution. here is my problem: suppose there is an image ( I call it IMG_A),place IMG_A in the X-Y plane , put a mirror cylinder at the center of IMG_A. what we see in the cylinder mirror is a deform image (I call it...

Homework Statement A capacitor is constructed of two long concentric metal cylinders, each having length of 1.0 meters. The inner cylinder has a radius R1 = 1.0 cm, and the outer cylinder has a radius R2 = 1.25 cm. The hollow space between the two cylinders is filled with nylon having a...

Hi guys, I was just doing an experiment with relating the weight flow rate of water out of cylinder with a pin hole at the bottom. The equation that I put together was: $$\dot{W}=\rho g C_d A \sqrt{2gh}$$ ##\dot{W}## is the weight flow rate, ##\rho## is the density of water, ##g## is the...

Hi, there. I remember when I was in the University (mech. engineering), I had an exam on partial differential equations about heat transfer in a cylinder. We had to determine the temperature distribution. I remember the conditions were that the cylinder was insulated in the side area, had a...

Homework Statement A 75 kg solid cylinder, 2.1 m long and has an end radius of 5.0 cm, stands on one end. How much pressure does it exert? Homework Equations P = f/a P= pwh (this is the equation my teacher gave us on a power point but I might just be using it wrong) v = pi r2h[/B]The Attempt...

is the water pressure at the bottom of a cylinder tank full of water more than the water pressure at the bottom of an upsidedown cone tank full of water?? If so, what eqauation could be used to find the pressure at the bottom of the cone?

Hi guys, The imagine the picture attached is a cross section of a cylinder. How would I work out the maximum amount of pressure this can be exposed to before the metal shears off at the location labelled "2mm thick"? Lets say the following material is used: T6 Aluminium Ultimate Tensile...

Homework Statement [/B] A wire with linear charge density lambda is surrounded by a cylindrical conducting shell with radius r and surface charge density sigma. Find an expression for the electric field (magnitude and direction) as a function of distance d from the wire, on an axis...

Hello 1. Homework Statement In a uniform solid cylinder of radius r, mass m and height h we emptied a cylindrical cavity of radius r/4 tangent and parallel to the symmetrical axis z of the original cylinder. The cylinder is rolling without slipping on a horizontal plane. Find the kinetic energy...

Homework Statement How do we find the motion equation and more specifically the motion equation of something with a mass $m$ in the vertical plane along a cylindrical path of radius $R$, (Translation: A point of mass $m$ slides frictionless in the vertical plane along a cylindrical path of...

Homework Statement A rectangle with a perimeter of 40 cm is rotated around one of its sides creating a right cylinder. What is the largest possible volume for this cylinder? Homework Equations Volume of a cylinder= pi*r^2*h Perimeter of a rectangle= 2x + 2L The Attempt at a Solution I know...

Homework Statement what's the difference between zs and hc ? in the pictuire , they are both drawn from the bottom of water to the free surface ... Homework EquationsThe Attempt at a Solution [/B]

Hi! I am struggling with this problem the last two days and I cannot decide which solution is correct. Homework Statement A cylinder of radius R is fixed horizontally on the floor. A uniform chain of mass M and length L (L<πR/2) is placed on the cylinder in such a way that one end of the...

Hello , I post a message because I will need help with this exercise I would like to knowif my answer are good, I'm french : An infinite hollow cylinder charge is constituted of a sheath whose outer limits are R2 and R3. Wearing a uniform charge density ρ Question 2)calculate the total...

This is my first post on these forums, and I was hoping someone could answer a question I have. For my high school engineering course, we spend most of the year developing a solution to a problem of our choice. We are currently developing a composting tumbler that will turn automatically several...

Hi everyone I'm kinda new here, your support will really be appreciated ! :D 1. Homework Statement Let's say the cylinder has radius R, and height T. Homework Equations U = ∫GmdM/x The Attempt at a Solution My attempt is shown in the picture, I took a tiny element of the cylinder with...

Ok so i know the equation for the volume of a cylinder and the equation for calculating the radius. But when calculating the radius does the volume need to be converted into cubic inches or can it stay as imperial fluid ounces. Thanks

Homework Statement The problem states the following: One end of a string is attached to the ceiling while the other end is wrapped around a solid cylinder of mass 0.20 kg and radius 0.030m. The cylinder is released from rest and the string unwinds as the cylinder rotates and accelerates...

i got a small doubt.. can any1 please xplain me. if we apply a certain force"F" on cylinder of area of cross section A=pi*d^2/4(thatis,the diameter of cyllinder is d),then how much distance will the piston head move ??:bow:

We feel a gas cylinder of cooking gas to be heavier if we lift it. But when a kid of 14 kg is lifted it feels a lot easier to lift him than lifting a cylinder of cooking gas weighing 14 kg. Is it because the pressure is low because of larger surface area of the kid?

Homework Statement Need to find the moment of inertia of a cylinder, about its center of mass, about the three principle axes. Z axis is normal to the circular faces of the cylinder. mass = M, radius = R, height = h Homework Equations ∑miri2 The Attempt at a Solution The Izz for whatever...

A rod and Cylinder with a same axis of rotation relative to its body have different rotational inertia equation. WHY? Thanks in advanced.

Homework Statement The figure a shows a narrow charged solid cylinder that is coaxial with a larger charged cylindrical shell. Both are non-conducting and thin and have uniform surface charge densities on their outer surfaces. Figure b gives the radial component ##E## of the electric field...

Homework Statement This is just a general case I'm having trouble trying to imagine: https://lh3.googleusercontent.com/-mTyOwzfLy0E/VluaNlxEddI/AAAAAAAAAEk/2Creguw3xzY/w530-h174-p-rw/Screenshot%2Bfrom%2B2015-11-29%2B21%253A34%253A50.png Suppose there is a cylinder, kind of like a yo-yo, that...

Qn : https://www.dropbox.com/s/dpcws9q4bjpzvtp/20151123_112037.jpg?dl=0 Why is option A and C wrong or correct? My attempted answer : A :A is plausible as if the piston is suddenly moved inwards, the gas molecules bounce off the piston at higher speeds Since Temp proportional to rms speed...