Compression Definition and 633 Threads

Homework Statement Homework Equations The Attempt at a Solution Here is the work that I've done. This is an even problem in my book so the answer is not given. The professor did gave the answer to this problem as .33m. The most recent answer I got is .4m which means block b...

a monatomic ideal gas initially at 17°C is suddenly compressed to one-tenth its original volume. What is the tmeperature after copression? make the same calculations for a diatomic gas.

I read on Wikipedia that x-rays are sometimes used to compress nuclear fuel to initiate fusion reactions. This is probably a stupid question, but how can electromagnetic radiation compress matter?

Hi. I was wondering if anyone had ever done a relationship analysis of compression ratio in relationship to efficiency. I have heard that higher compression ratio can often relate to efficiency, but I was hoping to find some kind of graph correlation on it, however I haven't been able to find...

A 1.2 kilogram block is dropped from 0.48m above a spring in equilibrium. The force constant for the spring is 124 N/m. Calculate the maximum compression in the spring. m = 1.2 kg h = 0.48 + x k = 124 N/m x = ? Ep = mgh Ep = (1.2)(9.8)(0.48 + x) Ep = 11.76(0.48 + x) Ep = 5.6448...

Homework Statement Sketch the element for the stress state indicated and then draw Mohr's circle. Given: Uniaxial compression, i.e. \sigma_{x} = -p MPa The attempt at a solution Below I have the sketch and a partially complete Mohr's circle...

Hi everybody!:smile: I have a question about intercooling process in compressors Regarding ,for example, a mutli-stage compressor with 3 intercoolers,I'm a little bit confused about finding the intermediate pressures of each intercooler that minimize specific work.I'm able to find the...

How high a density would need to be generated to initiate nuclear fusion for a d-d reaction to occur? I know as we compress, temperature increases, but for a moment consider we can't heat the atoms, we can only compress them. What kind of density would would need to be reached? (Or is it...

Homework Statement A 0.75-kg object rests on a horizontal frictionless surface. It is in a position such that it is compressing a spring with a spring constant of 50 N/m. If the object is released, the object leaves the spring at a speed of 2.30 m/s. How far was the spring compressed...

Homework Statement A 11kg box slides 4.0m down the frictionless ramp which has an incline of 30o to the horizontal, then collides with a spring whose spring constant is 190 N/m. a.What is the maximum compression of the spring? b.At what compression of the spring does the box have its...

urgent help needed: compression testing hi guys, I have some homework problems about compression testing, please kindly help me out, I need to complete them by tomorrow but I have struggled for days... 1. what are the possible fixtures for compression testing? --- contrast them with those...

Homework Statement A 506 g block is released from rest at height h0 above a vertical spring with spring constant k = 500 N/m and negligible mass. The block sticks to the spring and momentarily stops after compressing the spring 18.4 cm. How much work is done (a) by the block on the spring and...

Two moles of a diatomic gas occupies a volume of 50 L and is at a pressure 4atm. The gas then undergoes a process: a reversible adiabatic compression, so that is temperature doubles. Find both temperatures, and find the volume and the pressure after the compression process. my thoughts...

I had posted a thread on another forum about building a 100GHz oscilloscope which resulted in the signal being chopped up by a bank of comparators and subsequently being fed into a video buffer for processing using currently developed parallel processing techniques. The subject of compression...

Suppose I have two masses with mass M each connected together by a spring with spring constant k like this: http://img827.imageshack.us/img827/4896/springs1.png Then I apply a force of F at both ends: http://img833.imageshack.us/img833/2562/spring2.png Then using Hooke's law F=kx, the...

Homework Statement A 0.40kg object connected to a light spring with a force constant of 19.6N/m oscillates on a frictionless horizontal surface. If the spring is compressed 4.0 cm and released from rest, determine (a) the maximum speed of the object. Homework Equations F = -kx The...

I'd just like to check my answer, it seems too big Homework Statement Air initially at 20◦C is compressed by a factor of 15. What is the final temperature assuming that the compression is adiabatic and \gamma ≈ 1.4 the value of \gamma for air in the relevant range of temperatures? By what...

Hello, I have a quick question regarding what goes on in air compressors. When air is compressed, I understand that we're doing a couple of things: 1. Squeezing a mass rate of air from one pressure to another - which takes work 2. Imparting heat to the gas stream - again part of doing...

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 have just started to work in a ultrafast spectroscopy lab. My topic that i will be starting on next week is supercontinuum pulse compression. I just graduated with my BS Physics and have only some experience with ultrafast optics. I know the general theory of how these things work and need a...

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...

Hi guys, i am having a bit of difficulty with the following problem: I have an arrangement whereby i have a silicone seal washer lying on a flat surface. A circular hollow tube is mated on top of the the washer/gasket which will from a seal once the tube is secured in place with a certain...

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...

Homework Statement In an air compressor air flows steadily at a rate of 15 kg per minute. The air enters the compressor at 5 m/s with a pressure of 1 bar and a specific volume of 0.5 m3/kg. The air leaves the compressor at 7.5 m/s with a pressure of 7 bar and a specific volume of 0.15...

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.