Compression Definition and 607 Threads

hi just a quick question,having done materials labs we came up with a figure of 275.8kN for the compression strength of a cube of concrete acting over an area of 150mm x 150mm. i want to convert this compressive strength to the standard N/mm^2 units.To do this i multiplied 275.8 * 1000 and...

Hey, first post! I happened upon this forum and after about ten seconds of perusing topic titles, decided this forum was definitely for me! Here is my question. What type of cross section would a beam need to be the most efficient at handling 1) tension and 2) compression. I am working on...

I was wondering out of all the known gasses, which is the easiest to compress?

Homework Statement A 60.kg firefighter slides down a pole while a constant frictional force of 300N retards his motion. A horizontal 20.0kg platform is supported by a spring at the bottom of the pole to cushion the fall. The firefghter stars from rest 5.00m above the platform, and the spring...

1. A Jaguar XK8 convertible has an eight-cylinder engine. At the beginning of its compression stroke, one of the cylinders contains 499 cm^3 of air at atmospheric pressure (1.01 x 10 ^5 Pa) and a temperature of 27.0 C. At the end of the stroke, the air has been compressed to a volume of 46.2...

I'm given the energy for a crystal lattice is U(Ro) = (-2Nq^2 ln(2) (1-1/n))/Ro for equilibrium separation (Ro). I need to show that the work to compress the crystal from Ro --> Ro(1-x) is 1/2Cx^2 where C = (n-1)q^2 ln(2)/ Ro. Any hints about where to start? I thought it would just...

Hi everybody! I'm new to this forum and i have a question i hope someone of u can answer... If i have a cylinder (made of plastic or some other light weight material) 1 meter long with an area of 1 dm2 that would be 10 liters right? Now, if i place the cylinder vertical and place a 8 kg...

Homework Statement A package with mass m sits on an airless asteroid of mass M and radius R. We want to launch a package straight up in such a way that its speed drops to zero when it is a distance 4R away from the center of the asteroid, where it's picked up by a waiting ship before it can...

A 57-kg water skier is being pulled by a nylon (Young's modulus 3.7 x 109 N/m2) tow rope that is attached to a boat. The unstretched length of the rope is 18 m and its cross-section area is 1.9 x 10-5 m2. As the skier moves, a resistive force (due to the water) of magnitude 190 N acts on her...

A 2480-kg statue is placed on top of a cylidrical concrete (Y = 1.6 x 10^10 N/m2) stand. The stand has a cross-sectional area of 6.5 x 10^-2 m2 and a height of 2.2 m. By how much does the statue compress the stand? this one deals with volume deformation but I'm unsure of how to start it out...

A gymnast does a one-arm handstand. The humerus, which is the upper arm bone between the elbow and the shoulder joint, may be approximated as a 0.26-m-long cylinder with an outer radius of 1.12 x 10-2 m and a hollow inner core with a radius of 3.7 x 10-3 m. Excluding the arm, the mass of the...

A massless platform is kept on a light elastic spring. When a particle of mass 100g is dropped on the platform from a hieght of 24cm it strikes the platform and compresses the spring by 1cm. From what hieght should the particle be dropped to cause a compression of 4cm? [text book answer: 396cm]

A 10kg box slides 4.0m down a frictionless ramp, then collides with a spring whose spring constant is 250 N/m. (Also, the ramp is angled at 30 degrees). a). What is the maximum compression of the spring? b). At what compression of the spring does the box have its maximum velocity? I started...

Hey! "Calculate the work done on 1 mole of a perfect gas in an adiabatic quasistatic compression from volume V1 to V2." The work done on the gas in this compression is: -\int_{V1}^{V2} P dV Because we are talking about an ideal gas the ideal gas law applies so...

i have a question in which a train collides with a buffer stop of mass 1.5 tons that asks how far the buffer stop is compressed. this is similar to a block and spring question, except the spring has mass. how is this included in the equation to solve for compression distance?

A 12 kg block slides from rest down frictionless 35 degree incline and is stopped by spring w/ constant of 3.00x10^4 N/m. The block slides 3 m from the point of release to the point of rest against spring, how far has spring compressed? Now I know this involves the equation Ws= 1/2kxmax2, but...

I would like to know how to calculate the flow rate of water under compression by a hydraulic weight. How do you calculate using the value of the weight on top of the water and the height of the water in a straight column?

here is how it goes, A block of mass m_1 = 2.0kg slides along a frictionless table with a speed of 10m/s. Directly in front of it, and moving in the same direction, is a block of mass m_2 = 5.0kg moving at 3.0m/s. A massless spring with a spring constant k=1120N/m is attached to the backside of...

Let's say, we have a spring designed for compression which is kept vertically on a table. Now if we press on the spring from the top, it will naturally compress. My question is, what will happen if we compress the spring from the middle instead of from the top. Will the portion above the...

Ok, I watched a TV show where they showed a test of a building designed to handle an attack like the OKC incident. There was a visible overpressure wave on the high-speed film that hit the building and cracked the glass and knocked a couple pieces of sheetrock loose (the building otherwise...

https://chip.physics.purdue.edu/protected/Halliday6Mimg/h10p33.jpg A block of mass m1 = 2.5 kg slides along a frictionless table with a speed of 12 m/s. Directly in front of it, and moving in the same direction, is a block of mass m2 = 6.2 kg moving at 3.7 m/s. A massless spring with spring...

Q. Given f(x)=2(x^2)-4 , determine the new equation g(x) after a vertical compression by a factor of 1/2. The answer provided by the book is g(X) = (x^2)-2, but shouldn't it be g(x) = (x^2)-4 ? Help will be much appreciated. Regards, Adam

A 7.94 kg stone is resting on a spring. The spring is compressed 10.2 cm by the stone. (a) Calculate the force constant of the spring. (b) The stone is pushed down an additional 28.6 cm and released. How much potential energy is stored in the spring just before the stone is released? (c)...

A vertical spring with k = 495 N/m is standing on the ground. You are holding a 5.8 kg block just above the spring, not quite touching it. How far does the spring compress if you let go of the block suddenly? i thought i could just use k = F/distance so 495(D) = (5.8)(9.8) D = .1148...

Spring Question! A 250g block is dropped onto a relaxed vertical spring that has a spring constant of 2.5N/cm. The block becomes attached to the spring compresses the spring 12 cm before momentarily stoppoing. While the spring is being compressed, what work is done on the block by (a)The...

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...