Compression Definition and 607 Threads

I need to find the equation for the work of a reversible isothermal compression of 1 mol of a gas in a piston/cylinder assembly if the molar volume of the gas is given by V= ((RT)/P) + b where b and R are positive constants. Not sure what to do .. please help! THANKS

What kind of thermodynamic process is the compression of a gas when the volume varies reducing it, and the temperature increase, and there is an exchange of temperature with the exterior (the walls of the compressor are refrigerated, but I assume that the gas will increase its temperature a...

Homework Statement If a person holds a 30cm spring and compress on it with a force of 100 N (where k = 1000 N/m), by how much is the spring shortened. Homework Equations Hooks ' Law: F = -k* deltaX The Attempt at a Solution The answer for this is 10 cm: 10 = -1000...

We could imagine a rod moving fast enough to compress it within its own Schwarzschild radius. Should it collapse into a black hole? Or is the rod's own reference frame, where it isn't compressed, the one that makes decisions here?

Over the last 2 years, i have been developing a compression technique that is free of "mathematical" expressions. By doing this, the compression scheme would be free of traditional mathematic limitations usually applied to compression routines. I'll go right into it, please let me know if i...

Trying to assess how relative humidity impacts COT, compressor outlet temperature, on a turbo charger compressor. It appears that humdity reduces gamma in the temp prediction formula, thus reducing COT. Dry air results in increased COT, and humdity reduces it. Any opinions on this?

If say a cylindrical piece of material with a high yield strength is compressed in a vice with a force approaching the yield strength, will the temperature be affected? What about its resonance frequencies? Does shape affect the maximum yield strength?

If you stand on a bathroom scale, spring inside compresses .6mm, and tells your weight is 710 N. Now if you jump on the scale from a height of 1m, what does the read at it's peak? This is what I tried to do: I used Hooke's law: F_{}s= k*x and solved for the k which is spring constant...

Homework Statement 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 degrees celsius. At the end of the stroke, the air has been...

hey is there a formula for compression and tension? if so would you be able to let me know what they are? thanks! :)

The interior of the Earth is hot enough to melt rock. Obviously friction plays a role. But does compression also heat rock? If yes, what is the underlying chemical mechanism, perhaps an exothermous reaction, that heats rock?

Homework Statement Use work and energy to solve the following. A .1 kg ball is placed against a massless spring that has a stretch constant 50,000 N/m and is compressed 2 m. The spring fires the ball straight up. a) How far did the ball rise assuming no friction? b) The ball's actual rise was...

Homework Statement A 2.5 kg block slides along a frictionless tabletop at 6.0 m/s toward a second block (at rest) of mass 4.5 kg. A coil spring, which obeys Hooke's law and has spring constant k = 860 N/m, is attached to the second block in such a way that it will be compressed when struck...

Please I need help with this question. I know I have to use the stress = elastic modulus x strain equation, but i do not know how to apply it to this particular problem. A Bone has a young's modulus of about 18 x 10^9 Pa. Under compression, it can withstand a stress of about 160 x 10^6 Pa...

Hey guys, Just trying to understand this piece of information I have been given. It is for a compression ignition engine. I can see where they get the 115.954 kmol/kmol fuel and 120.204 kmol/kmol fuel from but don't understand how to change the units 0.7027 kmol/kg fuel and 0.7285 kmol/kg...

Could anyone tell me what the compression and expansion is used for in a Thermodynamics situation? What is the notation for Compression and Expansion in a formula? I am trying to calculate work done by a heat engine. Thanks

Could anyone tell me what the compression and expansion is used for in a Thermodynamics situation? What is the notation for Compression and Expansion in a formula? I am trying to calculate work done by a heat engine. Thanks

Hi, When a gas is compressed, its temperature increases. But what is the formula to calculate this rise? Could you please explain the formula too. This isn't homework btw! Thanks!

One mole of a van der Waals gas is compressed quasi-satically and isothermally from volume V1 to V2. For a van der Waals gas, the pressure is: p= RT/(V-b)-a/V^2 where a and b are material constants, V is the volume and RT is the gas constant x temperature. For the first part of the...

Hello everyone. We are working on a 8th grade science fair project. We are trrying to conduct experiments that will let us find the relationship of a particular gas's compressabilty and its temerature increase when compressed. We are trying to make the project reletivly advanced, and hope to be...

I have been reading a bit about cryptography recently, and there are a few things that I haven't understood so far: #1) I read that since compression removes redundant information, it is a randomizing function. Does that mean that I would have more high quality random data afterwards if I...

[FONT="Times New Roman"]I have a few questions concerning the Doppler Effect, I know what it is in terms of a moving object, and how speed effects fequency etc. but I'm more interested in the explantions. My actual knowledge of the two explanations is reasonably vague. The one I am interested...

Despite my very limited knowledge on magnetic fields and nuclear fusion being a high school student; I am curious whether you can take a perfect hollow sphere; and (if possible) wrap magnet wire around the shell in such a way that has a magnetic field on the inside of the container...

Homework Statement A Concrete column 2M in height 100mm in diameter and containing four steel rods each at 15mm diameter calculate the stress and the amount the column is compressed due to the load of 9Kn. the modulus of elasticity for the concrete (in this case) is 20GPa and for the steel its...

The first part of this problem says that a 8.0kg stone rests on top of a spring, and compresses it by 10.0cm. It then asks what the spring constant is. This is the work I did (assuming g = 10m/s^2, not 9.8m/s^2): (8.0kg)(10m/s^2) = 1/2k(10cm)^2; 80N = 50cm; k = 1.6 But, the textbook says...

I want to know if in rapid adiabatic compression of a gas, is work done by gas on surrounding (atmosphere) numerically same as work done by surrounding on the gas. Please tell if there exists some solid proof of the answers you guys are giving.

Homework Statement Determine the change in the entropy, Helmholtz free energy, and Gibbs free energy, when a mole of ideal gas is compressed from 1atm to 100atm at 20C. The Attempt at a Solution I am not entirely convinced by my attempt below -- can anyone spot something wrong? (I thought it...

The springs of a 1100 kg car compress 6.0 mm when its 68 kg driver gets into the driver's seat. If the car goes over a bump, what will be the frequency of vibrations? I tried to use the weight of the man (68 kg) and the compression distance (6 mm) to find the spring constant. I then tried to...

A block of mass 0.528 kg slides with uniform velocity of 3.85 m/s on a horizontal frictionless surface. At some point, it strikes a horizontal spring in equilibrium. If the spring constant is k=26.7 N/m, by how much will the spring be compressed by the time the block comes to rest? What is the...

This is Problem 10.46 from the Engineering Physics Book by Knight. A vertical spring with k = 490 N/m is standing on the ground. You are holding a 5.0 kg block just above the spring, not quite touching it. a.) How far does the spring compress if you let go of the block suddenly? b.)...

Homework Statement A 50-kg mass is dropped from a 20-m height onto a very long, initially uncompressed spring of force constant k = 100 N/m Homework Equations Ueo=Ugf+Uef F=k(Lenght Final-length initial) The Attempt at a Solution I tried using Ueo=Ugf+Uef, and i couldn't...

Homework Statement "A compressor takes air at 300K, 1 atm. It delivers compressed air at 2 atm, using 200W of power. If the process is adiabatic and reversible, what is the rate that air is delivered, and what is the final temperature of the air? [k of air = 1.40]" The Attempt at a Solution...

If a piston compresses air (2 moles) to half of its original volume, the temperature increases, according to the gas laws, the volume of the gas will be in step with its temperature. Does this mean that the compressed gas at its new temperature will expand according to its new temperature(say...

Homework Statement A package of mass 8 kg sits at the equator of an airless asteroid of mass 5.8 105 kg and radius 32 m, which is spinning so that a point on the equator is moving with speed 4 m/s. We want to launch the package in such a way that it will never come back, and when it is very...

Homework Statement An ideal gas initially at 100kPa and 300K is contained in a piston-cylinder device with an initial volume of 5 liters. The gas is then compressed slowly according to the relationship that pV^2=constant until a final temperature of 400K is reached. Sketch the process on a...

1. Three bars each has weight W. They are pinned together at the corners to form an equilateral triangle suspended from the ceiling at point A. So points B and C (the other two vertices) lie on a horizontal line. I need to draw a diagram of each bar separately, showing all the forces acting...

I m making a project on Variable Compression Ratio (VCR)engine and hav got some ideas for attaining Variable Compression Ratio in an engine. i studied ur SAAB Variable Compression (SVC) engine,i found it quite intrewsting and innovative,but i wud like to have some more information about that...

Homework Statement The board sandwiched between the other two boards in Figure P4.77 weighs 95.5N. If the coefficient of friction between the boards is 0.663, what must be the magnitude of the compression forces (assumed to be horizontal) acting on both sides of the center board to keep it...

Hi, Please explain .. What is Crimp amd compression crimp hose fittings? What are the advantages and disadvantages of flare and flareless fitting?When to go for flare and flareless fittings? Thanks Ana

Homework Statement Could somebody help walk me through this problem?: A spring has its right end fixed and is installed on a horizontal table so that the free end, in equilibrium, is at x= 3m. A 1.65 kg block coming from the left slides along the table. When it passes the origin, it is moving...

I am starting to program a simple physics model of a car to help me understand how it works. I am certainly going to have to make quite a few simplifications as I'm only just about to start A levels. Whilst researching how to simulate engine braking I came across the Racer (racing simulator)...

I am having a problem determining the equation to use here. I want to find the energy to compress hydrogen using a pump from a low pressure to a high pressure. Do I use an isothermal or an adiabatic equation? thanks

Homework Statement An object of mass 10kg is at rest at the top of a frictionless incline. The mass is 2m higher than the elastic spring (k=10 N/cm). What is the objects maximum speed? What is the maximum spring compression? I think I may have got the answers but I'm not sure. Can someone...

About a year ago I came up with an idea for a compression algorithm which could potentially compress any type of data (pictures, movies, text, ect) with equal ability, and could potentially compress it to 1/1000 or less of its original size. It is such a simple idea that I am sure that if it...

If a gas is adiabatically compressed and the calculated change in internal energy is 1600J, is the WORK done on the gas also 1600J??

Homework Statement A block with mass m_1 = 2 \textrm{kg} slides along a frictionless table with a speed of 10 m/s. Directly in front of it and moving in the same direction is a block of mass m_2 = 5 \textrm{kg} moving at 3 m/s. A massless spring with spring constant k = 1120 N/m is attached...

Can somebody give me a link to a place where they explain crumple zones and know how to simulate that with poster board and balloons? And how would i figure out the perfect amount of air to put into a balloon to withstand as much compression as possible?

P, Q, R, S are light rods attached to the wall with a force W acting at that point in the figure. Please explain whether Compression or Tension is acting on them respectively by using Free body diagram and proper explanation. Can I resolve W in this way so that we have a force in the...

Density of water vapour in the air involving compression Homework Statement A volume Vi = 23.2 L of air at temperature T = 22 °C is compressed at constant temperature to a volume Vf = 11.0 L. The relative humidity of the air before compression is H = 59.4 %. The saturated vapour pressure of...

An ideal gas at a temperature of 17.7°C is compressed adiabatically from an initial volume 70.0 l to a final volume 43.0 l. Find its final temperature (in °C) if CV = 2.50R. so T1V1^g=T2V2^g to find g=cp/cv=(cv+nR)/cv and cv=2.50R g=(2.50R+nR)/2.50R factor out an R...