Compression Definition and 633 Threads

Ok...this is a thought model to help me understand some things you have a cylinder with a gas in it. You also have moveable piston. I move the piston into the cylinder, compressing the gas by 25% of the original volume. I know the pressure of the gas will increase for two reasons...

Hi, Got to the last question in my mechanics problems list and just can't get it! You have a brass tube with steel bar inside. The brass tube is 400.12mm long; longer than the steel bar which is 400mm long. You have to calculate the stress in both objects when a compression load of...

A 2.00-kg package is released on a 53.1 ^\circ incline, 4.00 m from a long spring with force constant 120 N/m that is attached at the bottom of the incline. The coefficients of friction between the package and the incline are \mu_{s} \;=\; 0.40 and \mu_{k} \;=\; 0.20. The mass of the spring is...

in SI engines fuel/air mixture is compressed. The disadvantage is that one can't achieve high compression ratios. I was wondering if it was possible to compress fuel/air mixture to the maximum possible ratio without fear of ignition and compress a pure air mixture to very high ratios 25:1 and...

If the quasiturbine engine takes in fuel after compression and then burns it at constant volume, wouldn't that increase the efficiency of the process as constant volume burning is more efficient than constant pressure burning at same compression ratios? If such a burning is not possible, what...

I'm having trouble getting started on this entire problem. I've re-drawn it, I'm given the mass of the cart, and the radius of the loop.. but I have absolutely no idea how I can calculate even the first part of this (minimum high h). I'd greatly appreciate any help anyone could offer. Thank...

A right cylinder of radius R and height h is rotating about the yaw axis at angular velocity \theta. What is the net compression in Pascals? I took the elemental volume as 2\pi rhdr where 2\pi rh is the lateral surface area at r. Then the radial force at a distance r from the origin is...

I've heard a lot about Tesla turbines so I was wondering if there was a way to compress air using Tesla turbines. Can it be done?

An ellipse is defined by the equation \frac {x^2}{144} + \frac {y^2}{36} = 1. Determine the equation of the ellipse formed when the original ellipse has undergone a horizontal compression by a factor of 1/2 and a vertical expansion by a factor of 3. I'm not quite sure how to work out the...

What am I doing wrong in this problem? You need to record an entire collection of your favorite music. It consists of 39 hours of music. Assuming you are using MP3 encoding (MPEG Audio Level III at about 128kb per second), how many CDs will you need? (hint: a CD can store up to 700 MB of...

Just some pronunciation... "The medium was rarefactive or compressive" Is that the right way to say it?

Problem: Consider a Bose gas with N particles is placed in a container with volume V and has temperature T, T < T_c. If the gas is compressed isothermically, what is the work done on the system when its volume is redused by a factor of 2. Now I'm sure I could do this with an ideal gas, but...

if you stand on a bathroom scale, the spring inside the scale compresses .50 mm, and it tells you your weight is 700 N. Now if you jump on the scale from a height of 1.4 m, what does the scale read at this peak. i found an equation to use, i just can't figure out what I'm solving for. I'm...

How do you find the distance a spring is compressed by an object when kinetic friction is involved?

An ideal spring is used to fire a 15.0-g block horizontally across a frictionless table top. The spring has a spring constant of 20 N/m and is initially compressed by 7.0 cm. The speed of the block as it leaves the spring is: i do the following: energy stored by spring: (kv^2)/2= 0.049...

Is there a formula to calculate the amount of force needed to compress air from a low atmosphere to a higher one? In my situation, I have a chamber wherein the pressure is one (1) atm and I ned to push the air from that area into a reservoir where the pressure will increase with each cycle. Am...

having trouble with this problem... any ideas? A 2.798-kg block is on a horizontal surface with muk = 0.170, and is in contact with a lightweight spring with a spring constant of 775 N/m which is compressed. Upon release, the spring does 0.969 J of work on the mass while returning to its...

Problem from book "the roof of a 9m x 10m school has a total mass of 12600 kg. The roof is to be supported byt "2 x 4s" (actually about 4cm X 9cm) along the 10m sides. How many supports are required on each side and how far apart mush they be? Consider only compression and assume a safety...

A vertical spring is created by affixing one end of the spring with k=500N/m to the floor. A 2.0kg mass is held .8m above the equlibrium position of the free and of the spring and released from rest. What is the speed of the mass when the spring is compressed .15m? I need help setting up...

I was reading the science fiction story "the gold at the starbow's end" by poul anderson (I think) which contains an idea for data compression. Poul Anderson suggested that a large number be compressed to the sum or difference of a few high powers of numbers. In the story it was something like...

A coil of wire is formed of many loops. These loops, though tracing a circular path, may be though of as being parallel to each other. We know that whenever parallel wires carry and electric current, there will be a mechanical force generated between those two wires. When electric current is...

If i compress air enough without altering temparature it will turn to liquid right ?

visualize a model of the whole universe as a wobbly mass of gooey fluid, like a very loose jelly in zero gravity. A model of the universe with these characteristics of a liquid would allow for the perception over time of accelerated expansion within OUR time horizon. therefore that...

has there been an experiment verifying the compressing of light's wavelength by gravity? i thought i heard of one verifying light's wavelength lengthening (redshift) by the Earth back in the 60's or something, i was wondering if we'd proved the compression(blueshift)?

I'm stuck on the following application of integrals: Question: It requires .05 joule (Newton-meter) of work to stretch a spring from a length of 8 centimeters to 9 centimeters and another .10 joule to stretch it from 9 centimeters to 10 centimeters. Evaluate the spring constant and find the...

I have heard how math is related to MP3 compression format, anyone know more and would like to share his/her canny wit? -Tom

My question regards some of the audio compression codecs and the effects they have on physical audio reproduction and power consumption. Specifically, I am referring to the well known "lossy" codecs such as mp3, Ogg Vorbis, and MusePack. These codecs use algorithms designed around a...

Would Someone check my work please? Here is the question. The pressure on 500g of copper is increased reversibly and isothermally from 0 to 5000atm. Where density = 8.96X10^3kg/m^3 Volume Expansivity = 49.5X10^-6K^-1 isothermal compressibility = 6.18X10^-12Pa^-1 specific heat = 385...

A block having a mass of 2.80 kg is given an initial velocity of 1.2m/s when it collides with a spring. The constant force of friction acts between the block and the surface with (mu sub k=0.5) and the force constant of the spring is k=100N/m. What is the maximum compression? I've been...

I am trying to figure out how many bricks can be stacked before the bottom brick is crushed? Not sure where to start - thinking about using bulk modulus for clay, but that only talks about compression, which I am sure there is a limit, but I am not sure how to find this. Thanks Nautica

Hello forum members I need some help on H.W problem...just enough reasoning to atleast get started the question is as follows: 5 moles of a monoatomic ideal gas at an initial volume of .50 m^3 and an initial pressure of 2.0 * 10^5 Pa undergoes an isothermal compression to .20m^3. Find...

"compression" of an electrostatic charged sphere Everytime i propose a new motion machine from my ignorance or misunderstunding of physics, your explanations solve some questions, but open new others: I proposed a system that acumulated electrons on a sphere surrounded by an electrons...

The other day i came across [Removed Broken Link], and while reading it i started thinking; "Why don't we human try to compress the things we learn before learning them, and uncompress them when we need to remember them ?". Then i realized that the human brain finds it easier to memorize a...