Compression Definition and 607 Threads

Hi. You may only understand what I am going on about here if you play an instrument. I have often noticed that there are songs that I really love and know inside out, which, in my mind, I can play almost perfectly in my head; most of the parts and certainly all of the melodies etc. But...

Can you help me with this problem? An ideal gas is compressed adiabatically. The work done over it is 200 J. How much will the internal energy change? A) 200 J B) 100 J C) -200 J D) 0 J Which formula do you use to solve it? Thanks in advance!

Hey, I just fnished med school and I have been conduction biomechanical research for the past 3 years now. I am currently working on a project plan and I am encountering the following problem: We would like to measure compression across a joint, using partially threaded screws. For the...

I have an "odd" use for pvc pipe. My house is made exclusively of styrofoam and plastic. (and a geodome to boot) I need to stick with this as any other material that was used has failed miserably (wood and steel mainly) my question is, how much weight can a 10' piece of 3" schedule 40...

Homework Statement A 0.280-kg block along a horizontal track has a speed of 1.30 m/s immediately before colliding with a light spring of force constant 43.6 N/m located at the end of the track. What is the spring's maximum compression if the track is frictionless? The Attempt at a...

As an example what is the estimated distance between each blade of a Jet Turbine blade and how far would each rotary blade be from the other to compress the air within the turbine housing? My accomplishment would be to make a miniture sized electirc turbine, which i have made when i was 13...

a sample of an idel monotomic gas is intially at a pressure 1.6*10^4Pa and undergoes an adiabatic compression which halves the volume. What is the final pressure? ive been trying to find a way of useing the equation W=-P\DeltaV but am starting to think this is the wrong one as i can't see...

I came up with this question a while ago, and my Physics teacher and I just can't get the math to work. Here it is: A cylindrical container of base area A and height h holds some number of moles, n, of an ideal gas. One end of the container is movable, and a force F is applied to that...

Homework Statement The two blocks I and II shown above have mass of m and 2m respectively. Block II as an ideal massless spring attached to one side. When block I is placed on the spring as shown in figure (a), the spring is compressed a distance D at equilibrium. Express your answer to all...

I am very interested in how hot a diesels compression chamber gets right before it shoots the fuel in and ignites. I want to know a formula that I can use to get the peak temperature. I know there are several factors like time and piston/engine heat absorbing, but if the engine is 200F, I...

Hi I'm a beginner in solid state physics. My question is : What does it mean "Traceless Compression" ? In matris terms "traceless" means product of diagonal elements is zero . is this the same thing ...

Homework Statement A 2kg block is dropped from a height of 40 cm onto a spring of force constant k=1960 N/m. Find the maximum distance the spring is compressed. (The answer must be 10 cm) The Attempt at a Solution Well, I know that if a spring is stretched "y", it will be compressed...

Homework Statement A piece of aluminum as shown in the picture is applying a compressive force on the fiberglass material. I need to know if the loading material will exceed the specification of the fiberglass material. Homework Equations Properties of fiberglass Tensile...

Calculating the max distance of compression of the spring please HELP! Homework Statement A 2.0 kg block is dropped from a height of 40 cm onto a spring of force constant k = 1960 N/m. The maximum distance the spring is compressed is? Homework Equations I Used the equation W=mgh and...

please help me ,i have a project which i m not easy with can anyone help me in designing a a vapor compression cycle for cooling in the summer and if desired heating in the winter, and a ground source heat pump for cooling in the summer and if desired heating in the winter.

Hi there, For this question, I've been asked to calculate the maximum energy a spring can store when compressed by 8cm. I've already found the spring constant to be 5.0\times 10^5\ Nm^{-1} (which is correct), so I thought it was just a simple matter of pluggung the values into the formula...

Homework Statement The spring of a gun has a spring constant, k, of 4.0lb/in. When the gun is inclined upward by 30 degrees to the horizontal, a 2.0 oz ball is shot to a height of 6.0 ft above the muzzle of the gun. (a) What was the muzzle speed of the ball? (b) By how much must the spring...

Homework Statement A mass m1 = 8 kg is at rest on a frictionless horizontal surface and connected to a wall by a spring with spring constant k = 70 N/m as shown in the figure. A second mass m2 = 5 kg is moving to the right at vo = 17 m/s. The two masses collide and stick together. How long...

Homework Statement Part a.) You launch a 0.5 kg water balloon with a spring cannon in order to his someone 20m away. The spring in the cannon has a spring constant of 350 N/m. The spring cannon fires the balloon at a 30 degree angle with respect to the ground. What is the initial velocity...

Hi, has anybody worked with heat pumps? I'm recently confused about how the heat pump compressor operates. Does it have a fixed pressure or it actually adjust its pressure automatically to outdoor temperature variation? All my confusion originate from the following problem: Now we have a heat...

Homework Statement Two blocks A and B are connected by a spring of spring constant 1000N/m. Block A is 2kg and has a rightward velocity of 5m/s. Block B is 3kg and has a rightward velocity of 10m/s. When block B collides with block A, there is a maximum compressional force on the spring. What...

Velocity and Acceleration at Maximum Compression (help, test tomorrow??)! Homework Statement A 300g ball compresses a spring 1 cm when just sitting on it (no motion). The ball is dropped onto the spring from 25 cm above the spring at equilibrium. How much will the spring compress as it stops...

Most of my physics homework problems have had no problem treating a spring as being able to operate in both compression and tension. However, I now need to find a way to actually implement that for a design project. The general idea is a test bed creating opposing force to test a new actuator...

Is there a formula to calculate how much force is released from compression springs knowing the exact specifications of the spring of course? Like if it takes 100g to compress a spring completely, how high would 50g travel when the spring is released.

Hello All, I am trying to understand something I read in an article about magnetars and pulsars. The article states that when a magnetic object, such as a star, is compressed, the magnetic field strength increases. Intuitively, this seems true, as the number of field lines will remain...

Homework Statement A 1.8- m long brass bar has a square cross section 1.3 cm on an edge. The bar is compressed by a force of 9.0×10^3 N applied to its ends. By how much does the bar shorten (in m)? Homework Equations There is an example in our book explaining how to use a variation of...

Homework Statement A solid steel bar of diameter d1 = 60 mm has a hole of diameter d2 = 32 mm drilled through it. A steel pin of diameter d2 passes through the hole and is attached to supports. Determine the maximum permissible tensile load Pallow in the bar. -Yield stress for shear in pin...

Problem: An object of mass m1= 10 kg moving to the right with a velocity v1=30 m/s, collides with a second object of mass m2=5kg, which is initially at rest. The 2 objects stick together, and they continue to move with the same velocity V. The moving system of 2 blocks compresses a light spring...

Hi, if I'm using the 3d element, I'm wondering how to detect the tensil and compression for a known stress state? the hydrostatic pressure p has been used before, but i don't think it is correct to all the cases.

what is the maximum "compression ratio" lease visit this link http://www.starrotor.com/Engines what is the maximum "compression ratio", so to speak, achievable by compressors? i don't think it is very high.

In "Introduction to Thermal Physics" - Schroeder, the derivation for adiabatic compression: V^\gamma P = \mbox{constant} is derived by assuming the compression is still slow enough to be quasistatic. However, I'm still a bit confused with how slow is 'slow'. Quasistatic compression needs...

A 2kg block is placed pushing against a spring. The spring is compressed and stores 10 joules of potential energy. The block remains attached to the spring as it oscillates on a frictionless track. The mass experiences zero acceleration when the spring compression is __________ A. greatest...

Homework Statement A compressed cylinder holds nitrogen gas at room temperature. How cold is the gas that is escaping from the cylinder? T(cylinder) = 298 K P(cylinder) = 1.034e7 Pa n = 1 Homework Equations PV = nRT The Attempt at a Solution So since I was not given either the volume of...

I know that when a metal is compressed its fermi energy is increased. I would attempt to explain this by saying, "as the volume has been decreased, so has the allowed number of particle in a 3D box states, thus as we have the same number of electrons and fewer allowed states, and the pauli...

Hello everyone I'm quite confused here and would really appreciate help. Consider a spring standing upright with a box on top of it. Now according to statics there are two forces acting on the spring: the weight of the box G and the support of the ground -F. But when we calcuate the...

Hi, if I'm using the 3d element, I'm wondering how to detect the tensil and compression for a known stress state? the hydrostatic pressure p has been used before, but i don't think it is correct to all the cases.

Excuse my ignorence here but as I understand you cannot compress water. Why not, is there not some space between any molecules, particularly following heating, that would allow compression? Assuming there isn`t then how is it we can compress a pure gas. Is the situation not the same?

Hi everyone. Hopefully this should be a relatively simple question here. I'm running a compression test on my car and I am using a Bentley Manual (very good mechanical Bibles car people use that depict how to take apart the entire car) as a reference for the PSI I should be shooting for. A...

Hi All, I am currently researching required bolting torques for flanges on a large water pipeline, but my question relates to compression of compressed fibre gaskets. I know that catalogues and vendors typically specify the percent compression under a specfic test stress, and also percent...

Homework Statement A mass of 2.3 kg is dropped from a height of 4.82 meters above a vertical spring anchored at its lower end to the floor. If the spring constant is 20 N/cm, how far, to the nearest tenth of a cm, is the spring compressed? answer is 34.1 Homework Equations PE = mgh KE =...

I have a general question about otto cycle. If we heat a gas with constant volume its temperature rise according to PV=mRT. However during Isentropic compression(delta Q and delta S is zero), the volume is becoming less and pressure is increasing but i don't know why the temperature should...

Homework Statement the ball has a mass M and is fixed to a rod having a negligible mass and length L. If it's released from rest when theta=0, determine the angle theta at which the compression force in the rod becomes zero. Homework Equations A(tangent) = dv/dt = vdv/ds A (normal) =...

1. Homework Statement A 0.1kg is shot with a speed of 6m/s toward a 1.2kg spring gun( with spring constant of 0.4N/m). The spring gun is initially at rest with its spring relaxed. The spring gun is free to slide without friction on a horizontal table. The 0.1 kg mass compresses the spring to...

Homework Statement A 700 g block is released from rest at height h0 above a vertical spring with spring constant k = 445 N/m and negligible mass. The block sticks to the spring and momentarily stops after compressing the spring 20.5 cm. (a) How much work is done by the block on the...

Homework Statement A massless hooksw law spring has a unstretched length of L, when a mass m is ploaced on it, and slowly lowered until the mass is at rest, the spring is queezed to a length of x. the mass is then dropped on the spring from a height of h, use energ methods what is the...

This is my first time posting, but I've done quite a bit of reading around on here, and I admire your guys' intuition/skills for this stuff. Most of you appear to have a real knack for conceptualizing these problems, and I'm jealous ;). Homework Statement Two identical blocks, A and B, on...

Homework Statement An engineer creates a spring so that when an elevator falls from a height h, the spring constant k, only allows the elevator to reach an acceleration of 5g's. Let M be the total mass of the elevator and passengers. Solve for K Homework Equations F=-kx 1/2mv^2 + mgh + 1/2kh^2...

Homework Statement Block #1 (m=2.00 kg) traveling to the right at 5.00 m/s along a level frictionless surface collides elastically with block #2 (m=3.00 kg) attached to a massless spring of spring constant 275 N/m. Assume that block #2 was at rest before the collision. (a) calculate the...

This is actually related to Thermodynamics but as it comes directly under the Mechanical field I'm asking it here and I invite all my fellow Mechanical Engineers and Physics Experts to answer this. The question is : How does the Tempreature of a gas change (increase) when the gas is...

Homework Statement Particle A and particle B are held together with a compressed spring between them. When they are released, the spring pushes them apart, and they then fly off in opposite directions, free of the spring. The mass of A is 5.00 times the mass of B, and the energy stored in the...