Psi Definition and 169 Threads

As a jet engine travels through the sky and picks up speed ram air increases the air pressure at the air intalk of the engine. How many mph does the engine have to be going for ram air to 2 atmospheres = 29.4 psi? At what speed in mph = 3 atmospheres? 4 atmospheres? Is this a linear or...

Hey all I am a newbi and wondering how to do this conversion. When i see a water pump which is 1400G/hour at that rate what would be the psi? For example my garden hose is about 40psi and at that rate it would mean a curtain g/ph based on say a 15mm outlet radius. Im trying to figure out what...

Alright, I've been looking everywhere, and tried to use a few formulas but they don't answer what I'm trying to find. Let's say I have a car that weighs 1815kg )4000 pounds) and its traveling at 90kph (roughly 56 mph) with a flat one square meter (10.76 sq ft.) grill facing the wind as it...

I have only found pneumatic cylinders for pressures up to 450 PSI. Why do they not make them for higher pressures?

I have come across a bit of conflict in wording of some physics and chemistry textbooks about the probability of finding particles in certain places. To be more specific, I have come across 3 different statements: 1. $$\int_a^b {| \psi(x) |^2 dx}$$ The above integral is said to give the...

Tom Brady has NOT thrown enough footballs in his career to sense a two psi difference in inflation pressure? Anybody believe that?

1. Problem statement A steel rod supporting a stress of 8000 psi at 1000 ◦ F is not to exceed 5 % creep strain. Knowing that the steady-state creep rate can be expressed by an equation of the form ##\dot{\epsilon}_{s}^{C}=B|\sigma |^{n} exp \left(\frac{-Q}{kT} \right)## ε⋅, strain rate B...

For those of you who have read the theorem, probably have also read Matt Leifer's review of it. In his review he says that the only way to remain psi epistemic is to be an anti realist(copenhagen), or to abandon the bell frame work. Is it viable to be psi epistemic but still believe that...

I've noticed that certain propane torches will have a seemingly linear relationship between their PSI and BTU/hr. IE, 18 PSI -> 220,000 BTU/hr. From this a person could calculate how much gas is being burned per sec/minute/hr. So, is there a general relationship/formula that I can use to...

So in a cnc machine, the screw that drives the x,y,z axiis are called "lead screws". I am constructing a machine that displences fluid at percise volumes. It will be essencially a seringe with one way valves coming in and going out. To open the "check valve" it requires at least 1.5 psi. If I am...

why is psi = cos (k r - w t) + i sin ( k r - w t) = e^ [ i ( k r - w t)]? my question precisely is why not: 1. psi = sin (k r - w t) + i cos ( k r - w t) ? 2. psi = sin (k r - w t) + i sin ( k r - w t) ? 3. psi = cos (k r - w t) + i cos ( k r - w t) ? why not any of these three? is...

I'm working on a kinda-sorta confidential device. I would like to know how much psi is required to lift approx. 400 pounds 120m (about 393ft and 8 13/32 inches) into the air. The thing I'm working on is still in the designing stage, so don't worry about the specifics of individual thrusters and...

we have a wavefunction \psi (x) the question asks for \psi (p) and says to use this to calculate the expectation value of momentum. The problem is the expectation value of momentum is integrated over dx so after transforming how do you get the integral to be over dp? thanks for any help with...

I just started reading the quantum theory.I came across the wave particle duality experiments and just after that the book had the Schrödinger equation.I don't understand what psi is exactly in that equation and what a wave function is and how it differs from a wave equation mathematically.can...

Hi guys, I thought that |psi|^2 was a probability density function and that when integrated over a region this would give me the probability to find the particle in that region. (assuming that psi was normalized) But some ph.d. in physics told me that no, that's wrong and when I use the word...

Dear Ladies and Gentlemen, I would appreciate any help I could get in understanding the conversion of psi to lifting capability. Such as how many pounds of weight could a 10,000 psi pump lift in pounds. I have searched the net but am coming up blank, I'm sure there is a formula for this...

Homework Statement Air is coming out of a .002 inch gap consuming 139.2 SCFM@80PSI, what is the MPH this air is moving at and is there any loss one inch out from the face of the gap? I am unsure of what formula to use, it has me puzzled.

What is the "A" in the wave equation: Ae^{i(kx-wt)}? What does it mean in quantum mechanics? Is it just the amplitude?

What happens to ψ in a infinite potential well when the width is suddenly reduced to half its previous value ? Will this instantly adjust ψ to the new size of the well or will it take some time to confine itself in this new well ? And is there a possibility of quantum tunneling here?

The project that I am working on. I am aerating a pond with an air stone diffuser. The diffuser requires 2 CFM of air flow to work optimally. Im feeding this diffuser with 1/2" pvc line at a distance from compressor to stone is approx. 200 feet. The stone is placed 10 feet deep under the...

Compressor wanted -- produce up to 100 bar/1450 psi @ 40Vdc I'm searching for a compressor that is compact but is able to produce up to 100 bar/1450 psi. It also should work on max 40V DC. Please say if you know similar compressors! Thanx already :)

This is a question for those with Shankar in their disposal. When studying from this book, Exercise 5.1.1 puzzled me. Now, it is easy to solve the exercise from 5.1.9. However, how would we expand psi in terms of the energy eigenfunctions,* if we did not have 5.1.9*, but instead started fresh...

1.) If a car is in a frontal crash test, and goes hurling into a steel wall for instance, what unit of measure is used to define the strength of the steel wall? For instance, is the resistance strength of the steel measured in tensile strength, yield strength or something else? 2.) Another...

Suppose you have a hollow cube with a volume of 504c3. The inside of the cube has a psi of 94 and is just air. Now suppose that a hole opened in the bottom of this cube with an area of 12.56cm2 that leads to a hollow cylinder that is 14 cm long with a radius of 2cm. Now how would you go about...

Why do we call the psi function the "wave' function When in reality it has little to do with waves. Sure the schrodinger equation admits sinusoidal solutions but so does the heat equation.

although this may appear to be a homework question – it is not. I understand that in order to determine PSI at 100 feet of water, you would divide 100 x 2.31. 42.39 PSI in order to create that much PSI in an air chamber that is 7.3333 cubic feet; how much power in KW would be...

If I put vents on the hood of my car and drove at 60mph what kind of psi could be achieved? I don't care about what kind of technique is used just curious about what kind psi could be created. I apologize if I'm not asking this correctly but I have no background in fluid dynamics.

I work for a manufacturing company. We want to make some improvements to our compressed air system, but we want to establish a baseline of our current efficiency for cost justifications, etc. One planned improvement, is redesigning our current piping layout. We spoke with a consultant who wants...

I am trying to find the psi needed to lift me off the ground at an acceleration of 1m/s/s so i started with the equation f=ma. For acceleration I added f=m(1m/s/s) but i need to cancel gravity out, so I took 9.8m/s/s + 1m/s/s = 10.8m/s/s. I thought it would work because 1m/s/s was the...

I'm not a student of physics but do have puzzle I am trying to solve. Is there a way to calculate the force of a water droplet impacting a vertical surface stated in psi at various speeds of impact? A more practical way to state the problem would be; what psi will rain impact the chest of a...

I'm trying to measure and regulate gauge pressure in a pipe that has water flowing through it, but I need the pressure to be about .75psi (1.8 ft H2O). Most dial gauge ranges are too high and not accurate enough. Pressure transducers I've had no luck with as far as finding one that's inexpensive...

Hi! I'm trying to follow the video lectures of the course 'Quantum Field Theory II' by Francois David given at the Perimeter Institute PSI programme, but it would be nice to have some notes or a book which were similar to the lectures. I am especially interested in the part on Wilsonian...

Homework Statement For a university project I have to design a safety enclosure for hydrostatic testing at pressures up to (20000 psi) on equipment with maximum volume 8m3. I am having difficulty finding data to calculate the expansion energy of water in the event of a sudden brittle...

please see attachment FEET PSI. I am looking for the total load in psi on each leg/foot. thanks very much

If, I have a 2.5" dia X 60 inches tube, at a internal pressure of 15,000 psi. If the valve is opened (orifice opening of 3/4" Dia), what will be the ( same dia) additonal length of tube that will be needed to relieve the pressure from 15,000 psi to 0, Using water as a medium at 75 deg F. The...

Hi Guys, My friend is asking me to do the calculation for NPT thread. He is asking if 1 1/4 NPT thread is able to hold 10 000Psi pressure acting on it. In my opinion there is no need to do the calculation for the thread. Of course it will hold it. Don't quote me on this but I think that...

I just had a question involving both psi and phi. I know that: Ψ= (1-√5)/2 = -0.618033989... Φ= (1+√5)/2 = 1.618033989... And out of boredom, I decided to put into my calculator: (Φ^Ψ) = 0.7427429446... But my question rose from there: What happens if you do (Ψ^Φ)? I plugged it in and...

Why does the pressure in a compressor have a unit PSI instead pound? If the pressure of a compressor is 10 PSI, would a 10 sq in nozzle cause the pressure to drop to 1 psi?

I was doing my homework just now, writing a lot of \kappa's and all of a sudden I can't draw them anymore :frown:.

Does a 12" x 1.5"D tube filled with 10psi have more force on an piston than a 6" x 1.5"D tube filled with 10psi? Or is 10psi the same on an object no matter what size the tank...

If I want to make a Square or Rectangle storage tank 5 feet deep and 22 feet long and 1 foot wide. The tank will be under 30 psi and also vacuum. That’s not hard to do what I want is the walls not to deflect more then .001 of an inch. The walls can be plastic, plywood with a steel sheet or...

Homework Statement My problem is that I can't remember a certain psychological effect. Homework Equations N/A The Attempt at a Solution I remember reading up a certain phenomenon, or effect of brain. The brain when viewing an image becomes ''imprinted'' into the mind. When that...

Hi, I am an undergrad doing research with CERN and in examining data from ATLAS. I was looking for instances of Z bosons decaying into muons by taking systems with two energetic, oppositely charged muons, adding their four vectors, and getting the invariant mass of the result. There was an...

I think I have a rough idea how to get there...but I'm not sure. Let's assume I'm riding a bicycle, and I'm peddling at a constant pressure (torque). This is a peddling pressure which would be the exact amount which would just lift a 50 pound weight off the ground and hold it there...

I need to build a device to test the water resistance of a piece of restaurant equipment. The device must deliver 2.5 GPM of water through a nozzel with an opening of 2mm. Can someone please give me a formula to calculate the required PSI to deliver the needed volume of water? Thank you.

Hello PF, I would like to know what is the calculation for determing the amount of force it would take to combat PSI of the wind in a vehicle moving at 80 mile per hour.

I have a pump that puts out 396 gal/hr of water. The output pipe on the pump is 9/16 inch in diameter. Is there a way to calculate the psi?

Hello, i don't know if this is the right place to post this question but I am sure someone here can help me out. i need to be able to calculate the psi of a gas in a tank, for example let's say i have 3000 liters of hydrogen in a 1 gallon tank, what would the psi be in the tank? the only help i...

I have a "process" that creates approx. 1.7" of water column throughout a large enclosed surface area, at temperatures ranging from 1500 to 2250 F. I am trying to show the actual force applied to the shell over a large surface area from the known measurment of pressure. For instance, I have 1.7"...

What temperature F does water freeze at 65 PSI ? I looked this up online but all I find is stuff I already know and lots of advertisements. It makes me mad to clink on a link that forces me to look at an advertisement and when I try to click to leave it will NOT let me leave. All I have...