Machine Definition and 968 Threads

I just saw The Imitation Game and was wondering how the original Turing machine broke the enigma. Could someone explain it to me?

Homework Statement Two containers are connected by a cord (of negligible mass) passing over a frictionless pulley (also of negligible mass). At time t = 0 container 1 has mass 1.3 kg and container 2 has mass 2.8 kg, but container 1 is losing mass (through a leak) at the constant rate of 0.200...

Can anybody tell me how to calculate torque for rotating sweeper machine broom? Broom Dia is - 0.6 m Length - 2 m Weight - 150 Kg Rotating RPM - 150

Homework Statement The double Atwood machine shown in the figure has frictionless, mass-less pulleys and cords. Determine the acceleration of mA, mB, mC. Homework Equations F = ma The Attempt at a Solution...

Homework Statement http://photo1.ask.fm/723/921/945/-419996993-1shh761-9gamg0f647hgbk/original/IMG_4081.jpg There is no friction at all and this is a pulley system. The pulleys and string are mass-less. The numbers correspond to the block weight (ex: 3 = 3kg). Homework Equations F = ma...

Homework Statement In the image shown, two blocks hang on a pulley. Assume that m1 is the more massive block, and that the pulley is massless and frictionless. Take the initial case to be the instant just after m1 is released from rest, and the final case to be the instant just before m2 hits...

Hi, We have been trying to make a machine that tests springs. ( a simple drawing is attached ) We place the spring between two points. The top point has an s-type loadcell attached to get the force data. The initial size of the spring is 150 mm's. (L0 size) For the experiment we stretch the...

< Mentor Note -- thread moved to HH from the technical engineering forums, so no HH Template is shown > hello really need some help i would like to know how would the torque speed characteristic for a "constant frequency variable voltage supply" and 'variable frequency variable voltage...

Homework Statement A more sophisticated weighing machine contains two springs. The effect of these is that the machine is more sensitive to masses less than some fixed value M0 than it is to greater masses. The equilibrium displacement is alpha1*M when M<M0, and (alpha2+c) when M≥M0 , where...

Homework Statement Air at pressure 20[atm] enters an air machine and leaves at 1[atm]. what must be the temperature of the air at the entrance so that when it leaves it is 00C. Assume adiabatic process. Homework Equations PV=nRT Adiabatic: ##P_1V_1^\gamma=P_2V_2^\gamma## The Attempt at a...

I can't get this idea out of my head. I keep thinking it will work but there must be something wrong... Do me a favor a tell me why it won't work so I can stop thinking about it! In it's simplest form there's no crazy math to understand just a few basic laws of physics and mechanics. I guess...

Homework Statement [/B] An Atwood's machine consists of two masses, mA and mB, which are connected by an inelastic cord of negligible mass that passes over a pulley. If the pulley has radius R0 and moment of inertia I about its axle, determine the acceleration of the masses mA and mB. Homework...

I'm a second year student and I've been researching about machine learning. I'd like to start learning more, and I'm wondering if someone could advise me on the appropriate modules to take which would help me in this goal. List of modules: http://www.ucl.ac.uk/maths/courses/undergraduates/ For...

Homework Statement For context, the first question for this diagram asks for the force F on m1 needed to keep m3 at a constant height. The second question (which I'm struggling with) asks for the acceleration of m1 in the case where the force F=0. All surfaces are frictionless and I've...

Homework Statement Good Morning, my teacher is making us redo this lab with data he collected. I was wondering if someone could check to see if I did it right so far. I have to graph the left side of equation B (in the spreadsheet) and the same for A. then I have to find the moment of inertia...

Hi, I need to use a transition function to describe a Turing machine that decides if $ a^n ∈ {a}^∗$ is odd or even. I've got an example in my notes that erases any input and halts. But I am struggling to do one for the odd and even question. Thanks for any help!

I need to know how much electricity a machine uses in kW please. On the machine information plate it states: 460 volts, 60 Hz, 161 amps, and it is a 3 phase. I took the readings for the volts and amps: Phase 1- 271 volts & 37.68 Amps Phase 2- 271 volts & 37.62 Amps Phase 3- 273 volts & 38 Amps...

Hey! :o Could you tell me which is the relationship between the Turing Machine and RAM Models??

An example of this kind of a problem would be a frictionless, massless pulley holding two equal masses(say, 5kg each). But then, an additional mass is added to one side (ie, a frog jumping on to mass 1, 1 kg). What would happen to the system? What if the frog jumps off?Initially, I know that the...

Hi all, Just a quick question about control of axial flux synchronous machine. Does it follow more or less the same technique ( which include PWM, inverter and dq transformation )? Is there any major difference from control of radial flux machine? Thanks in advance. Regards.

Does altering Gear Ratio improve efficiency (loss of energy as heat while converting EE to ME) of a machine? I also read online that having higher gear contact ratio improves the efficiency, but I really don't understand how.

Homework Statement [/B] The double Atwood machine has frictionless, massless pulleys and cords. Determine the acceleration of masses mA,mB,mC, and the tensions in the cords.Homework Equations [/B] F=maThe Attempt at a Solution [/B] First I looked down the bottom section. Assuming mB> mA...

I'm actually grading this stuff, and have a question. Ideally there's no friction and no kinetic energy of pulley. If we take them into account, which one is more important? I wonder how to analyze this? Thanks a lot.

Hi everyone, I'm a little confused what is going on in our textbook. There are a number of questions that state the table below has the Open Circuit (No Load) and Short Circuit Characteristics of some synchronous machine. But then the columns don't seem to match that wording (I'd think that...

Homework Statement A 1000 kg mass car is driving at 3 [m/sec], how many kcal develop in the brakes till full stop Homework Equations Kinetic energy: E=\frac{1}{2}mv^2 Energetic equivalent of a kcal: 4186 [joule] The Attempt at a Solution ##E=\frac{1}{2}1000\cdot 9=4500[joule]##...

Below is an image from a website article discussing a Turing machine. It is supposed to represent a Turing machine, but I don't really follow the notation. I assume this is part of Wolfram's book, "New Kind of Science", which I do not have a copy of. I have only ever seen a Turing machine...

I have an old washing machine that finally bit the dust, so I've decided to attempt several projects with its remains. I want to try to make a mechanical chicken plucker using the tub and motor. I've disassembled and salvaged all the useful parts and scrap metal, but when it got down to trying...

I was taking apart a CPAP (continuous positive airway pressure) humidifier earlier and found 2 of these sensors spaced around 5 cm apart from each other. They were in an air conduit leading from a filter material on the outside of the device to the pump intake. The points of the sensors were...

I have attached the lab right now I am stuck on proportional error in multiple variables I want to take the lab step by step so i can learn how to do calculate all the variables from now on. I have lab partners during the lab but I am completely clueless when I am working on it on my...

Homework Statement I'm trying to construct a Turing machine that after receiving two integers x,y gives back the smaller one (or any of them if they are equal).Homework Equations I cannot use anything besides zeros and ones (I have seen that some people make turing machine using letters to keep...

Hello Guys, Can I use a washing machine's motor in a sliding gate opener project ?

Why can we say that a Carnot's machine efficiency does not depend on the fluid that you are heating? Is it because Carnot's machine is very ideal, a mere thought experiment? I have another question. I know that the efficiency of a heat engine depends on the quantity of heat that enter and...

If we pull/ push a weight of 10kg and dislocate it 1 meter the energy spent is 10 joules, can someone tell me roughly if 10 j is 100% can anyone tell me how much energy (calories) has been burned /wasted in excess? I suppose it can vary in different persons and by different factors, I'd like...

I was reading Cengel's thermodynamics and noticed that he uses a thought experiment to show that there is no machine that is more efficient than the Carnot reversible machine. He says that both a reversible machine and an irreversible machine are connected to high and low temperature deposits...

I need a contraption that can keep a ball spinning, smoothly, at a slow speed. If it has a variable speed control, that would be better, but minimally it would need to spin a soccer ball and take around 30 seconds to make a full rotation. The look of the device doesn't matter, just that it...

Homework Statement A gambling machine shows one out of five colours, red , orange , yeloow, green and blue. When the machine is working properly, every colour has an equal chance of appearing the colour. And the colour shown at one instant is independent of the colour shown earlier. Calculate...

I have a couple questions actually. One I was wondering in what part of the brain would an interface that allowed you to access the internet be placed in the future? It's not like the brain has an expansion slot. Two how do they decide where to place electrodes in current interfaces? Do...

Dear all, I am following Shigley's Mechanical engineering design as a textbook for my course of machine design.But i would be very thankful if anyone gives me some references books of machine design in pdf format containing more and more problems.It will be helpful also if you can provide any...

I'm working on a project that requires me to use a CNC metal cutter. I'm using LibreCAD to design the thing I need to have cut (it's a radio chassis). The wiki doesn't really offer much besides a general how-to-use, and after playing around on the program I'm wondering two things. First...

Homework Statement 7.27 ** Consider a double Atwood machine constructed as follows: A mass 4m is suspended from a string that passes over a massless pulley on frictionless bearings. The other end of this string supports a second similar pulley, over which passes a second string supporting a...

Hello, I have an FSM which has 1 serial input and 4 outputs. The FSM must react to the table attaced in file. I can see that if the input is(for example)4 the output is 7(+3). I have to draw a state diagram(mealy). I can't solve it. Need some help Thanks

I'm watching The Twilight Zone episode The Brain Center at Whipple's on Me-TV. It was originally shown in 1967 but is still relevant 47 years later. Comments? https://www.youtube.com/watch?v=vFgLVU-eKRE

what is diff in application of 3 & 4 roller plate rolling machine. which type of rolling machine more usefule for 6 mm plate... & please suggest the ways to reduce the flatness of end portion after rolling ...

Hi, I'm not from Software Engineering background and I'm trying to learn State Machine Diagrams on my own by looking at resources on the internet. I'm trying to come up with a State Machine Diagram for a telephone but I can't seem to find an answer on the internet. Can you help me by telling...

Hey there, inspired by this exhibit in the SF exploratorium, I was discussing with my colleague what might happen if you put a thick piece of pure copper (say, a 5kg ingot) in the bore of a 3.4 T MRI machine. (What about 7T?) We have the MRI machine, all we need is a big piece of copper...

1. A 77.00 Nt object (denoted as object 1) rests on the ground. A light cord is connected to this object which runs vertically upward over a light frictionless pulley and is attached to another object denoted as object 2. a) Calculate the force that the ground exerts on object 1 if object 2 is...

Hello everyone! In the following speed-torque characteristic of a DC shunt motor, we see that if the speed exceeds a certain value, then the machine becomes a generator. I don't understand something. How is it possible for the machine to have a negative torque and a positive speed...

Homework Statement This isn't a homework problem, but I thought it would fit best in this section because it is an actual problem. Therefore, I don't know what the solution is, but it interests me. First let me start off by saying I've solved Atwoods machines before but now that we've...

I'm having trouble with the concept. I have two questions. According to various internet posts, the force of gravity of the masses attached to the Atwood machine does not act on the rope whatsoever. Is this correct? It is kind of confusing to me, because the rope is attached to these...

Hello all! I have recently started a Parts Cleaning Machine manufacturing business. Most of my clients are Automobile Manufacturers & Ancillaries. The last couple of years have been disastrous for the automobile industry here. So I was looking to broaden my horizon and target the Steel...