Real world Definition and 121 Threads

I'm currently taking the EE version of E&M 1 this semester and I'm fairly disappointed in how my professor is handling the material. Every problem is highly symmetric I honestly haven't actually evaluated an integral all semester. The integrals are just remembering the surface area or volume of...

Hi, I'm having trouble with the application of filtering to real acceleration data. I have looked at a lot of recommendations, filtering through fft, butterworth high and low pass filters, and I'm not finding something that's working for my data and I'm looking for recommendations. I...

Equations are all well and good when you have things like "Let x = something" "Let b = the spin" "Let y = the weight" ect... But if you wanted to really do your own experiement at home. I have a penny on my desk, I'm sure you have all done it before but if I hold it on it's edge and then spin...

Let's say I see a parked car, the tire of the car is resting against the curb. Would you actually have to go with a tape measure and measure the curb, measure the wheel and then you'd be able to find the area underneath the curb and the tire? It's just confusing. Soooo many math equations...

I've been reading a lot, looking for ways to make my heat pump "work less" or more efficiently in the winter months. Since the HP transfers heat... in the winter it's 'taking' heat from outside and moving it inside.. supposedly heating my house. Would it be advisable or beneficial (both in out...

So in high school my teacher would like to always talk about how useful quadratic equations are in a diverse set of circumstances when using math to measure and calculate real life phenomena, but he never really mentioned any real world applications outside of a few abstract word problems. So...

[b]1. Here is what I am trying to solve. I am not looking for a direct answer, I just need help solving the problem. I am a mechanical EIT working for a clean energy company. My boss (P Eng.) and I are trying to solve this problem but can't quite grasp the concept. OK so, we have a...

Hi, for a presentation I am requested to give some examples of the Real world applications of Parametric Differentiation. Now i know its to do with a differentiation of 3 variables that are connected, but for the love of god i cannot think of any examples of its practical uses. any help...

How would you find/estimate the probability of receiving the same utility bill, to the cent, two months in a row. This is a continuous distribution with an infinite amount of solution. However, for practicality, I want to make the distribution more finite. In reality, my bill will probably never...

I remember doing an experiment in Physics class to find the coefficient of friction with gravity. We set an object with a flat surface on top of a ramp, and adjusted the ramp angle so that the object would move down the ramp at a constant velocity. Then we measured the angle of that ramp to find...

Yo. I've had a rough semester. Things were actually looking up in the beginning. I am a sophomore mechanical engineering major and I was taking classes and doing well. I was especially enjoying thermo and nuclear engineering. I had even gotten my first job so that I could save up for a car...

My calculus I professor was an engineer, and liked to bring up that equations for events in the real world usually aren't pretty (non-linear). With that in the back of my mind, I started my first physics course this semester and we are doing the basic one dimensional movement of a particle...

Hello all, I'd like to check my work on this to make sure a safe lift is done. We have an 11m diameter, 35mm thick, 26mT circular steel plate to which we will add two trunions at the ends. The circular plate is welded in 4 parts and once we weld one side we have to flip to weld the other. That...

Homework Statement A heavy weight is suspended by a cable and pulled to one side by a force F. How much force is required to hold the weight in equilibrium at a given distance x to one side. Tcosθ=W and Tsinθ=F. Find F/W as a power series of θ. Often in a problem like this, what we know is not...

I came up with my own design problem, after completing a refrigeration design problem on the completion of my thermo I class. My design problem is this: I want to accelerate air to 56m/s via a compressor and then a nozzle. I'm trying to do a cost analysis of how much power I would save if the...

Homework Statement My dad is driving coal. His truck has a limited coal-capacity, and enough fuel. He drives this coal from the central which has enough coal, to farmers that need different amounts. As there are many farmers, he has to drive back and forth several times. He knows all...

This is a very philosophical question, so i understand the answer is going to be very arbitrary and subject to opinion. I am interested in both Pure mathematics and Theoretical Physics. The time is soon approaching, where i must decide upon which path to take. I love proofs, and i love...

Any practicing mechanical engineers post some internet links or tools used on the job? Would be much appreciated thanks.

I need to give a short presentation about Colorimetry in my chemistry class. I plan on using the first five minutes giving an example procedure about determining the concentration using MicroLAB's spectrophotometer hardware in our lab. I would like to use that last five minutes of my...

I just started learning about DE's and am impressed by how much information they contain. Are they usually just a relationship between several simpler functions? For instance, a basic kinematic problem like v = at + vo seems quite hard to come up with experimentally but v = d/t would be...

A mathematical model may show that there are two possible states for something in the real world, let's say a coin, that may be either heads or tails; make a computer program to simulate coin flipping and you soon discover that the odds of heads or tails is 50/50. In the real world however...

I was thinking about the 1/2 in KE = 1/2*m*v2 I thought about how strange it was, and then I realized that as a function on velocity (v), kinetic energy is the antiderivative function of momentum. However, I am very confused as to what that implies. My question is very vague, but what...

Just wondering, how would one write a solution (i.e. a wavefunction, or the appropriate name given to a quantum system in such a situation) to a macroscopic object in the everyday world? Would it be the macroscopic object is written as a superposition of states, entangled with all other...

Please remember that I'm not a math or science student - quite a layman in these areas. Therefore, please explain your reply in as much detail as possible. Thank you. I found the attached (modified) image on this webpage...

I think it is due to friction and the carnot efficiency is derived in a reversible cycle. Also,can i build just a little bit irreversible but still carnot? But if irreversible how can i draw the graph? Still smooth line?

I've never really understood the relationship between voltage, current, and resistance. The more I read about them, the less comfortable I feel discussing them. V=IR...mathematically, it doesn't get any simpler than Ohms Law, yet when I try to predict the behavior of its variables in real world...

We have windtunels to measure air flow, Erlenmeier flasks for chemical reactions, and so on. Why not just load the geometry of the aircraft into a computer simulation and get the results from there. It is much more cost efficient and you can manipulate things faster and easier. For chemical...

Physics books that solve "real world" problems Ever since I dropped physics last semester, I've been slowly accumulating books to try and find ones that speak to me. I'm a huge skeptic, always have been, and so far, many of them don't make a convincing case. Only one seems to speak to me...

I know this seems like a homework question but the last time I was in a physics class was <ahem> 1982. For product testing reasons, I have fabricated a (rough, very rough--no laughing at the fabrication/welding) 'repeating pendulum hammer'. Please see "test rig diagram.jpg" Distance from A to...

hi I've been set a project to test the limitations of the ideal op amp when applied to the real ones, and its doing my head in, if any of you could help me figure this one out i'd be very thankful. the first thing I'm confused about is the input offset voltage: i know its the voltage...

Hi. I am hoping that someone can explain, in the language of physics, the solution to a problem encountered during a real-world product design. I have already solved the problem. I am simply looking for why the solution worked in terms of the language of physics. Please see the attached PDF...

Hello. I hope I am posting in the right section, apologies if I am not. I need help with a situation that has arisen for a colleague of mine, he asked me for help but sadly I can't give him an answer based on fact and logic. Can you please help? In his kitchen he has a glass panel which is...

On a project i have i need to find a real world application for a function. I chose secant. It's too late to turn back and i need help.

As far as I know there is no firm prediction of any Lorentz bending derived from mainstream Loop. The authorities on what Loop says or doesn't say are Ashtekar, Rovelli, and Freidel. These are the people that organizers of any major world conference on gravity and related science would normally...

Do you know of any theory or evidence that shows the real world is (or is not) deterministic? By "deterministic" I mean: If we give exactly the same initial conditions to any system in the world, does it evolve to the same state?

1)What is the formal definition of a point charge? It is known, that coulomb's law , is valid for point charges? But the real world does not consist of point charges. And coulomb himself used two spheres in his experiments... 2)Another point, in many books I have found that they say, when...

Homework Statement NOTE: First time user. I am a member of an Ad Hoc fireball analysis group and my physics colleague is on travel. We have investigators in the field and therefore need to expedite an estimate. My background is geology and chemistry and I get "brain freeze" reasoning through...

I am math teacher and was asked the classic question, "Where am I ever going to use this in life" I usually have a real word example, but for the cosecant function I am stuck (Besides higher level math classes.) Anyone know a specific example?

Hey everyone! I recently picked up a motorcycle for class/work commutes because walking home at 11pm from the lab is not fun. But I have come across something of interest. Some intersections keep a green light on the main street and red on cross streets until a car pulls up. Before...

I have a safe that needs to be moved up an incline for 10 feet. The safe weighs 550 pounds and rests on wheels that are fully functioning. The incline sits at angle of 14 degrees. I need to know the force (preferably in a unit of measure that I'll understand) necessary to push this safe up...

Homework Statement i have a 76mm tank gun (it's legal and registered w/ the feds in case you are wondering) and i am interested in firing blanks - but here it the problem: i want the gun to recoil like it does when firing live rounds. here is how the gun works: there is a long barrel...

What are some mathematical equations that described patterns and objects that you will not find in the real world, i.e. the physical tangible university. String theory doesn't count since mathematicians are waiting for a detector to be built that will observed the strings that are supposedly the...

Homework Statement Describe what it means for a set to be well defined and then give an example of a well defined set and an example of a set that isn’t well defined. Explain why it is so important for sets used in the real world, for example in marketing research, to be well defined...

I'm trying to figure out the average deceleration of an aircraft that touches the ground at 104 knots (175.53 ft/sec) and decelerates to zero in 3200 feet? Does anyone know how to do this? Thank you very much to all who reply.

I've been saying for years that special relativity can be defined as "the claim that space and time can be represented mathematically by Minkowski space", but this isn't really true. Minkowski space is just a mathematical structure, and as such it doesn't make any predictions about the real...

I work for a glass replacement company where we replace broken glass in highrise buildings. My question is this, I have a piece of glass that we call a rake, but is really just in the shape of a right angle. The measurement from inside the building, called the daylite measurement, is 37 1/8"...

I have been looking to improve my skills in C++ to make myself marketable for the future. What I'm wondering is what kind of skills employers are looking for. I'm a pro at creating console applications, but I highly doubt tech companies would be working in that. For example, I was looking...

You've probably heard about the thing where scientists simulated 10 seconds of half of a mouses brain with a supercomputer. Does anyone know how fast of a computer it would take to simulate an ants brain? On a related question, let's say you wanted to simulate 1 cubic milimeter of the real...

Something has been puzzling me...what is an imaginary number in real life? I know that engineers sometimes use it but how do they apply it to real world situations? How is it anything but a mathematical constant?

I need to roll a 9000lb roll across the ground. It is 4.5 feet in diameter, and is 115 feet long. I am attaching the bold ends to apply torque to move it. I don't need to move it that fast. How much Torque would I have to apply to each end to roll this across a flat floor. Assume that all...