What is Mechanical: Definition and 1000 Discussions
Mechanical engineering is an engineering branch that combines engineering physics and mathematics principles with materials science to design, analyze, manufacture, and maintain mechanical systems. It is one of the oldest and broadest of the engineering branches.Mechanical engineering combines creativity, knowledge and analytical tools to complete the difficult task of shaping an idea into reality.
The mechanical engineering field requires an understanding of core areas including mechanics, dynamics, thermodynamics, materials science, structural analysis, and electricity. In addition to these core principles, mechanical engineers use tools such as computer-aided design (CAD), computer-aided manufacturing (CAM), and product lifecycle management to design and analyze manufacturing plants, industrial equipment and machinery, heating and cooling systems, transport systems, aircraft, watercraft, robotics, medical devices, weapons, and others. It is the branch of engineering that involves the design, production, and operation of machinery.Mechanical engineering emerged as a field during the Industrial Revolution in Europe in the 18th century; however, its development can be traced back several thousand years around the world. In the 19th century, developments in physics led to the development of mechanical engineering science. The field has continually evolved to incorporate advancements; today mechanical engineers are pursuing developments in such areas as composites, mechatronics, and nanotechnology. It also overlaps with aerospace engineering, metallurgical engineering, civil engineering, electrical engineering, manufacturing engineering, chemical engineering, industrial engineering, and other engineering disciplines to varying amounts. Mechanical engineers may also work in the field of biomedical engineering, specifically with biomechanics, transport phenomena, biomechatronics, bionanotechnology, and modelling of biological systems.
Hello, I'm currently a freshman planning to pursue Mechanical Engineering with the intent of getting a Master's in Nuclear Engineering. I am attempting to decide whether or not to pursue a minor in physics because I deeply enjoy physics. However, my degree by itself is challenging and I want to...
Hi,
I just started an introductory class on Mechanical Vibration and would like to know what's a good book mainly with good problems so i can practice.
To be more clear the topic discussed here ->...
Homework Statement
A closed, rigid tank contains a two-phase liquid-vapor mixture of Refrigerant 22 initially at -20 C with a quality of 50.36%. Energy transfer by heat into the tank occurs until the refrigerant is at a final pressure of 6 bar. Determine the final temperature. If the final...
Urgent help required! I need to simulate a rolling non-rigid tyre on a ground with obstacle(s). How should i proceed with ansys 14.5? Any help will be deeply appreciated.
Homework Statement
A roller coaster at an amusement park is at rest on top of a 30 m hill (point A). The car starts to roll down the hill and reaches point B which is 10 m above the ground, and then rolls up the track to point C, which is 20 m above the ground.
(A) A student assumes no energy...
hey, so I'm currently studying electronic engineering on year 2 of level 3 and having to study mechanical principles this year which I don't really know anything about and my tutor doesn't explain properly. I would appreciate some help on the method of calculating the questions. I've added clear...
Because there are only so many characters I can put in the title I will future explain down here. I want to do design/work on many things... I don't know how likely it is for me to do these things, but I want to work on electric motors, generators, nuclear reactors, Combustion engines, steam...
There are probably numerous threads like this, I have read them all but I'm still undecided. I am a high school senior and applying to UK universities - I have applied to more than one subject (three, actually: civil, mechanical engineering and computing, all from Imperial College) and received...
An Object slides with a consistent velocity down an incline that has a 30 degree angle.
I'm trying to find the kinetic friction and the ratio that the mechanical energy is lost on the way down.
I think I have already calculated µ with F(friction)= µmgcos(θ)=mgsin(θ) out comes Tan(θ) = µ
I...
1. Homework Statement
Three thermally insulated containers of equal volume are connected together by thin tubes of negligible volume so that gas can flow from one container to the next when a valve between them is open. Initially, the pressure and temperature in each container is at the same...
I was recently offered a job by the Puget Sound Naval Shipyard to be a civilian Nuclear Engineer in the Nuclear Fluids and Mechanical Engineering Department. I will be graduating with a BS in Mechanical Engineering in the spring (3.70 GPA), and have accepted this offer for employment, though its...
We want to slide a 12-kg crate up a 2.5-m-long ramp inclined at . A worker, ignoring friction, calculates that he can do this by giving it an initial speed of 5 m/s at the bottom and letting it go. But friction is not negligible; the crate slides only 1.6m up the ramp, stops, and slides back...
I am currently a freshman getting my undergrad in Physics, but I want to be a mechanical engineer. However, my school does not offer a degree in mechanical engineering. I would consider transferring out, but I have a full ride. The physics department at my school is also fairly good and they...
Hi everyone,
I'm a sophomore in college and we have a project discussing mechanical engineering. I'd like to know what you thought your career would be like before you graduated and now that you're in your career what is the reality.
Addition questions:
How long after college did you wait for...
Tim drops his watch from a 3-story-building, 12.5 m above ground. In task a. you were asked to find what the v was when it hit the ground, the answer was 15.7. However I am having trouble finding the answer to task b in which you are asked to find the h when the watch is dropped at the speed of...
So here's the deal, currently I am in med school (1st year) and the thing is i didnt love it but I am starting to hate it now
Initially i wantet to study mechanical engineering but i thought i wasnt good enough since I am not naturally good at math (i love physics though),i also was afraid on...
Okay, I hope I'm not bothering, but I just need some help, I'm a 16 years old guy from Egypt, I love Engineering and I've learned the Autodesk Inventor in 2011 (I was only 13), anyway, I need to boost my abilities to be able to be an mechanical engineer, I'm still in high school, but I'm willing...
I'm confused about what exactly is Q and U and their signs.
Consider a block initially having some kinetic energy which we stop and we want to find by how much amount its temperature increases.
Then Q=dU+W where dU is change in internal energy. (I'm using the sign convention that heat absorbed...
Homework Statement
Units of the problem are chosen to be such as KB = 1 and ħ = 1 so that energies are expressed in Kelvin and lengths in Å. The professor says the resulting value of ħ2 / 2 m for a 4-He atom is 6.0599278: how is that possibile?
Homework Equations
Natural units websites give...
I got a B.S. in Mechanical Engineering and I am now doing a PhD in Nanotechnology in which I am synthesizing a nanomaterial. Someone just told me that nanotechnology is more like mechanical engineering and materials engineering than any other thing. Based on my work I can see the relationship...
High school education. Retired from IBM 30 years. A bit of experience in control and data acquisition. Current interest in mechanical engineering, specifically epicyclical gear systems. I'm a firm believer in knowledge with understanding.
This forum looks very interesting and I am looking...
Hi everyone !
Iv read a lot of threads that brings up this subject . But couldn't find anyone that were in "my shoes"
Im a 24 year old guy who lives in Sweden and works as a carpenter ( 5 years experience )
Iv been studying math , physics and chemistry at evenings and nights for 2 years...
I'm a junior at my university in electrical engineering and we're tasked with created an original project for my electricity and magnetism theory class. I've come up with something I want to do, however a fair amount of the design for this project is pretty far out of what I know how to do...
Hi, I'm a mechatronics student and I am currently working on a project on the effectiveness of a vortex tube to cool a cabinet. The cabinet has a thermostat inside and if the temperature exceeds a threshold, an air compressor is turned on, causing the vortex tube to cool the cabinet. The cabinet...
What are the conditions necessary for applying the conservation of mechanical energy or the conservation of momentum? Can we apply these anywhere or do we require specific conditions which have to be fulfilled for applying them?
I currently work in the pharmaceutical industry and I work in a lab testing purity of controlled substances. I have wanted to do engineering for several years now, more specifically electrical or mechanical. I have started to develop medical conditions due to exposure to chemicals in the lab. So...
I think I'm kind of geared more towards Mechanical Engineering Technology because of it's practicality, but I also want to make my own designs, which isn't really taught in MET, where you get to do other people's designs.
But for some reason I don't want to do just ME or MET. So I've 2...
So I've been a part-time student for the last couple of years taking classes at a rather high-ranked public university that's well known for its engineering program. The problem is, my GPA is crap and so the only engineering program that will accept me is the engineering physics program. It's an...
Using some kind of launching/propelling system to launch a vehicle (toy size)...
The problem is getting the vehicle to turn at a certain point to avoid the obstruction w/o using any type of motor.
I've tried to look into zigzag patterns, but they all require electronic motors w/ gear shafts...
Hello All.
This is my first post, and I hope it is not too simplistic, but I am out of my normal line of work here.
I am trying to understand the relationships between flow, velocity, and cross sectional area with gases and fluids(air and water). Imagine a large vertical, cylindrical tank...
Hi, I'm a high school senior and I was planning on studying Aerospace Engineering but my local university doesn't have it so I was opting to study ME and then move to a bigger uni where they have AE so I can get my masters degree there. Is that a good idea? Plus where would I work after I get my...
Homework Statement
http://i.imgur.com/wJu0AEs.jpg
http://i.imgur.com/J9sEWgq.jpg?1
Homework Equations
Kinetic Energy = T = 1/2 * I * (theta_dot)^2
Potential Energy = V = 1/2 * Kt * theta^2
The Attempt at a Solution
Matlab Code and Results:
>> I1=3600;
I2=200;
I3=800;
I4=4800;
d1=0.15...
Hello everyone!
So, I am a mechanical engineering student but I've recently discovered my passion for electronics and computer science. I would eventually like to pursue a graduate degree in either or both (if that's possible) of these fields. I am thinking to get a mathematics minor to help me...
...that I'm not smart enough.
Yes, I know - hard work matters more than smarts. But I look at kids way younger than I am who are building things and have had a natural scientific curiosity, making physics for fun, doing differential equations since they were 8, etc. And I can't help but feel...
First post in the forums. Looking forward to some great conversations.
I took my ultimate exam for an A.A.S. in Instrumentation Technology, Electronics, and Bio-medical Equipment Repair Technology. I have an internship at a hospital SUPPOSEDLY scheduled to start in a month.
I have plans to...
I have recently transferred to UCSD from a community college, but I am not sure if I should continue my degree. Before I ask what I really want to know, let me explain my where I am at in school and life right now. I hope you enjoy reading :) but if you are willing, I am very interested in...
Hello!
I'm new here and I really need help from you guys.
I'm an engineering student and need to do project proposal for my final year project. We have 6 month to do the proposal and I cannot think of any idea.
I have experience in using
-Lathe
-CNC Turning and Milling
-Milling machine
-Drilling...
So, technically I'm a physics major. However as of late I've been experienceing a growing appreciation for the engineer, and particular, the engineer mindset. My question for you all is how can someone develop the engineer mindset? Does one simply just start building things like levers and...
Hello I am a senior in High School and I'm wanting to become a mechanical engineer but I have an issue I'm wondering how much of a disadvantage I would have for not taking Physics or Precalc in High school. I am now studying them up by myself even though I can't take them in High-school.
Hi guys and girls this my first post! Hope i got it in the right place. I need help understanding the mechanical advantage of this mechanism. The top sprocket is the input power the bottom sprocket is an idler the attachment on the chain is the output. Help!
Hi
If anyone has job prospect info, statistics or anything about these, please tell. Thanks a lot
Energy and Fluid Systems
Manufacturing and Dynamic Systems
Materials Engineering
Homework Statement
Two Hermitian operators X and Y have a complete set of mutual eigenkets. Show that [X,Y]=0 and interpret this physically.
Homework Equations
[X,Y]=XY-YX
If [X,Y]=0, XY=YX
The Attempt at a Solution
I have proved that [X,Y]=0, but I'm just falling a little short of...
So I am awere of everything in electromagnetism in physics,but lately I am enjoying in creating RC cars.But I only got to making a car going only forward,how can i make him turn?How could I transform only a part of the electrical energy into mechanical so that my RC car can turn left and right...
The problem:
Rumford observed that when one horse turned a cannon bore for about 2.5 hr the temperature of 27 lb of water that was initially ice cold (i.e., near 0°C) rose to near boiling hot (i.e., near 100°C). Given that one horsepower is 33,000 ft-lb;min, that 1 kg weighs 2.2 lb, and that 1...
When one lifts a block off of the ground and holds it in the air, the work done by one's lifting force is equal to the change in total mechanical energy of the block/earth system. Since the mechanical energy is KE+PE and since KE doesn't change during the motion, the work done by the lifting...
Well, here it goes again, I am a senior in high school and my english teacher has assigned my class a research paper with the topic being a job that we are interested in. My last post got deleted due to this sites rules, so does anyone know where I can find a mechanical engineer that I could...
Hey guys. So here's my story (and I'm sticking to it! - current career joke). Back in high school I had thought that a career working on cars was my dream job. I went to Lincoln College of Technology at 17 and when I realized how big of a waste of money it was I left (with a 3.8). Moved around a...
Hey there, i need some help please :)
As an assignment from my course, they asked us to bring some mechanical solutions for electric problems, and I don't mean in a specific area, i mean generally... i looked over the internet for it and found nothing..
If someone can please help with that would...