Piston Definition and 381 Threads

Homework Statement A 1.86 g piston is attached to a rotating disc. The radius is 25.5 cm when the disc is stationary. A spring attached to the piston has a spring constant of 31.3 N/m. The piston is rotating at a frequency of 10 Hz. How har will the piston move outward k = 31.3 r = 25.5 cm...

I do not know if this is the correct place to post this subject, I apologize if it is not. This is something I am really confused about: What is really the gas that pushes the piston down in an car fuel engine ? Is that the flame front gas, or that still unburnt gas which is ahead that flame...

Does the piston ever "stop" moving in a running engine? well guys...does it?

This is a conceptual question...hope you guys can explain the answers that the book gives! Its frustrating me to no end. This is actually a problem in the Enthalpy chapter, calorimetry section of section exercises of the Olmsted and Williams chemistry textbook, 3rd ed. Any help would be...

Given the same radial force and combustion pressure, would it be correct to say that the larger diameter piston would have a greater propensity to overcome the radial friciton of the piston rings? That is would a 50cm piston diameter overcome the friction than say a 25cm diameter piston easier...

Homework Statement A horizontal insulated cylinder contains a frictionless non-conducting piston. On each side of the piston are 54L of the same monatomic ideal gas with the ratio of heap capatities (C_p/C_v) = gamma = 5/3 at 1atm and 273K. Heat is slowly supplied through an inserted heating...

Does anyone have experience of calculating piston ring leakage, my problem is that the piston leakage is in a hydraulic system with a flooded cylinder and operating pressures of up to 400bar. All journals I find are on IC engines and so the theory is very different. There are also...

Hi I am struglling to work out the expression for theta=f(x) for a piston, that moves linearly by a distance of x along the inside of the cylinder, and is attached to a conrod of length l, whose other end is at a radius r on a fly wheel. I want an expression for the angle theta that the fly...

I am working on a lab report related to Ideal Gases at the moment, and I can't quite grasp how you would go about finding the temperature for absolute zero. Here's a brief synopsis of our experiment: We inserted a piston into a cylinder of water to keep the piston at a steady temperature of 23...

Homework Statement A 54.0 kg cheerleader uses an oil-filled hydraulic lift to hold four 130 kg football players at a height of 1.40 m. If her piston is 18.0 cm in diameter, what is the diameter of the football players' piston? Homework Equations The Attempt at a Solution 54...

i have asked this question before ,yet i ask again, why should we not consider the reciprocating action of the piston as simple harmonic motion? harmonic oscillations are when a particle may oscillate within unequal limits about the mean position a special case in which limits of...

Help me out on the working of piston pumps! Hi There, I m searching some information on working of http://www.arnorthamerica.com" and its mechanical characteristic please some one help me out on the same ! Regards Odoury.

I am very mystified by how piston and piston rings work (obviously they do). My questions are related but are in 3 parts: 1. What is highest pressure of the gas/liquid in a particular piston? (race car engine, construction machines...) and what is the approximate pressure in Kpa? 2. With...

Homework Statement A cylinder with a frictionless piston of mass M and cross section S is placed vertically in an atmosphere of pressure p. The cylinder is rotated 180 degree so that the opening of the cylinder faces down. During the operation the temperature of the gas inside the cylinder is...

in what way are liners useful for piston,do they act as a protective covering?can they be of many types?

Homework Statement This is Reif, Fundamentals of Statistical Mechanics, problem 5.4 A cylindrical container 80 cm long is separated into two compartments by a thin piston, originally clamped in position 30 cm from the left end. The left compartment is filled with 1 mole of helium gas at a...

can the motion of a piston be considered simple harmonic,being periodic in nature?in*case of a reciprocating engine.

Homework Statement Problem shown in attach picture A cylinder of total internal volume 0.10 m3 has a frictionless internal piston (of negligible mass and thickness) which separates 0.50 kg of water below the piston from air above it. Initially the water exists as saturated liquid at...

Homework Statement The figure shows a 50 kg lead cylindrical piston that floats on 0.68 mol of compressed air at 30°C. How far does the piston move if the temperature is increased to 300°C? (the base of the beaker is 10cm. A)130 cm B)1300 cm C)120 cm D)250 cm Homework Equations...

I had someone telling me about drilling small holes, down from the piston crown into the small space "behind" the top piston ring, purportedly to allow the combustion pressure to get into that space and force the ring out against the cylinder wall. The theory is that the gap between the top...

Hallo, I'm looking for explanation for the fact that in many diesel engines we have two springs supporting the piston valves such that one is exterior and the other interior and they have opposite helical direction. Also if anyone have a link or any information it would be very helpful.

Right, I am in the process of designing an axial piston pump. I have obtained the following formula from a textbook for power output. unfortunately i don't know what units the formula requires, is anyone able to confirm what they are? Also, if anyone knows of a good resource for pump design...

Homework Statement A vertical cylindrical tank contains 1.80 mol of an ideal gas under a pressure of 1.05 atm at 22.0^\circ C. The round part of the tank has a radius of 10.0 cm , and the gas is supporting a piston that can move up and down in the cylinder without friction. What is the...

hi. say we have a pneumatic cylinder with a piston and seals that cause a lot of friction, and the whole system is well isolated, so we could assume expansion is isentropic. friction causes loss of energy, so the cylinder warms up. since we add heat to expanding air, the expansion goes...

Hello. I need to minimize all types of manageable losses (mechanical and thermodynamic) in a reciprocating compressor. Does anyone have more suggestions besides having a high efficiency motor, no loss tank drain and high efficiency dual controller?

Homework Statement The Internal energy of fuel in a combustion chamber increases by 75J due to 130J of heating. How much work can be done by the piston? How far does the piston move while pushing with 5000N of force? Homework Equations The Attempt at a Solution Since they gave us...

I want to learn how to calculate what distance a fluid will travel up a small tube if a large piston is used on one side, and no piston on the other side. [SIZE="4"]Example Diagram (Consider everything is square instead of round, for easier measurements.) Assume there is a 10kg mass placed...

Homework Statement A cylinder with a 16-cm-diameter piston contains gas at a pressure of 3.0 atm. A.How much force does the gas exert on the piston? B.How much force does the environment exert on the piston? C.The gas expands at constant pressure and pushes the piston out 10 cm. How...

i know if you push or pull a piston QUICKLY, no heat is transferred (adiabatic process). But what if you push or pull a piston slowly? would heat be transferred in or out if you Push slowly? Pull slowly? why? thanks. i can't find the answer in my book, they just talk about the...

Hi, I am testing or trying to figure out how much heat would be generated for a piston that moves up and down and has two semi-circle wedges that press against to slow down its motion. I want know what factors and equations I can use to calculate the heat generation? All other related...

Homework Statement Consider the simplified single-piston engine in the figure. The wheel rotates at a constant angular speed of 1 rad/s and the radius of the wheel is 2 m. If the piston is fully extended at time t=0, find the position of the piston at 2s. The figure depicts a wheel with a...

Can thrust be used to describe the force used to accelerate a typical car (piston engine)?

I am working on programming a simulation/model of a piston engine (steam, gas, etc). I have run into some trouble with the geometry. I need to calculate the torque T on the crankshaft as a function of the force F on the piston, the crankshaft angle theta, the connecting rod length L, and the...

Homework Statement A gas filled pneumatic piston of a strut in a car suspension behaves like a piston apparatus. At one instant the piston is L from the closed end of the cylinder and the gas density is ρ. The piston is moving away from the closed end at v. The gas velocity varies linearly from...

Homework Statement A cylinder/piston arrangement contains water at 105 C, 85% quality with a volume of 1L. The system is heated, causing the piston to rise and encounter a linear spring. At this point, the volume is 1.5 L, piston diameter is 150 mm, and spring constant is 100 N/mm. The...

I'm looking at different topics for my masters thesis and one of them that has a lot of potential is a heat transfer model for a piston in an internal combustion engine. Apparently the auto industry has never directly addressed this problem and use a trial and error method when it comes to...

Homework Statement Horizontal frictionless cylinder piston device- piston is forced againtst a spring which exerts a force directly propotional to the gas volume. Patm (101.13KPa) also acts on the outer face. Considering the gas as a system, calculate the work for the process from an initial...

Homework Statement The cylinder and piston are made of a thermal insulator. An atom of a gas collides with the piston at an angle and bounces off at an angle. State with a reason whether momentum of the atom is conserved in this collision. Homework Equations The Attempt at a...

Homework Statement If a piston is compressed, how is the temperature affected? Homework Equations U=Q + W The Attempt at a Solution My soln: I thought that U=k.e. = (3/2)nRT=(3/2) pV ? Since PV is constant (P1V1=P2V2), shouldn't temperature be constant? Answer sheet: My...

Dear all I am a secondary and sixth form teacher in London and I have come across a puzzling situation involving a piston. Imagine you can set up a piston of known mass resting on a gas beneath. The piston will come to rest at a certain height from the bottom of the tube. We can work...

I’ve been searching for an answer to this question on the web for 3 hours. Thought I would find it quickly, but, noooooo. I’m trying to understand why crankshaft torque falls off at low RPM in normally aspirated piston engines. I think I understand the high end of the torque curve OK. At...

Homework Statement The closed cylinder in the figure has a tight-fitting but frictionless piston of mass M. The piston is in equilibrium when the left chamber has pressure p0 and length L0 while the spring on the right is compressed by delta L. The spring constant of the spring is k...

This seems like it should be really basic, so it's annoying me that I can't figure it out. Homework Statement One cylinder in the diesel engine of a truck has an initial volume of 600 cm^3. Air is admitted to the cylinder at 30 degrees celsius and a pressure of 1.0 atm. The piston rod...

hey guys, Im doing a question where it asks to derive the instantaneous velocity of the piston. We are given the potion of the piston as a function of instantaneous angular displacement of the crank. Now I checked the answer...and i m not sure how the \omega gets into the answer. if I take the...

You have a cylinder with an ideal gas inside, enclosed by a piston. There is a valve on the side of the cylinder could let gas through if opened. The valve is then opened and some of the gas escapes slowly while maintaining thermal equilibrium. Once it is closed, the piston is a little lower...

[SOLVED] volume of gas in a cylindrical vessel on which a piston has been placed Homework Statement A cylindrical vessel with a tight but movable piston is placed in a vertical position so that the piston, whose area is 60 cm2, is subject to atmospheric pressure. When the gas in the vessel...

[SOLVED] Piston Question that I do not understand Homework Statement A block rides on a piston that is moving vertically with simple harmonic motion. (a) If the SHM has a period 1.0s, at what amplitude of motion will the block and piston separate? (b) If the piston has an amplitude of...

Homework Statement I am trying to solve one theoretical problem. If I had an Iron piston cylinder with radius of 1 cm, such that it contains 1 liter of water(therefore about 318 cm tall), ( say Bulk Modulus of water is 1 GPascal), How much work(in joules) will be required to depress...

At a ride in an amusement part a cart, with a mass of 150 kg, rolls down a long curved hill. The height of the hill is 50 m and the length of the track that the cart follows is 300 m. As the cart rolls down the hill, it experiences both a rolling frictional force and air resistance. The net...

[b]1. How far must a 2.0-cm-diameter piston be pushed down into one cylinder of a hydraulic lift to raise an 8.0-cm-diameter piston by 20 cm? Homework Equations [b]3. what equations do i use is it pV=nRT