# All Questions

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288 views

### Mechanical Linkage Question - Velocity Diagram

Can someone confirm the velocity of B, given point C has velocity of 3 units/s down and point A has a velocity of 5 units/s upwards? My approach has been to resolve for the tangent velocity component ...
52 views

### Daylighting, how to improve coverage

I am doing this daylighting project for which we must bring the light far down into a bunker. I have found . I have heard and read that the quantity of light that you bring in a cable decreases, 60% ...
650 views

### Finding mass flow rate and exit temperature in heat exchanger stream

I'm working on a heat exchanger design project and I'm stuck at one of the first steps - energy and rate balance. In the problem, we have a hydrocarbon stream getting cooled by a water stream. We are ...
375 views

### Control the rotation of multiple discs along the same axis

I have an engineering background, I'm an EE, but I know almost nothing about mechanics and that's why I'm writing here. This is the challenge: how to control the rotation of multiple discs along the ...
47 views

### Thermosiphon System

I am working on a project and I have some questions about setting up a passive heating system (thermosiphon) with a heat exchanger. I will have a main boiler with a coil of copper tubing inside. This ...
50 views

### What is the analytical approach for a fiber cutting machine?

Folks, so today in the Lab I came up with this problem (see picture). It shows a cross section of a cutting machine. There's a blade moving with a constant speed $\frac{dx}{dt}$ towards the center of ...
2k views

### How to calculate temperature rise on AC induction motor in an evaporative cooler centrifugal blower?

A neighbor recently asked me if his evaporative air conditioner was running correctly because he felt the blower drive motor and it was too hot to leave his hand on it for long. I was surprised to ...
308 views

### How is RF data encoded in WAV files?

I have tried recording RF data using several different software packages: SDR Console, SDR# and HDSDR. They all seem to produce WAV files. When I open the HDSDR file in Mathematica, it says the file ...
116 views

### What is the most cost efficient way to cool a tank of oil with water?

I have a tank of oil which I plan to heat 24/7 with constant 15 kW. I want to dissipate this energy using water as a coolant. I have the outside unit of an out of order split type air conditioner that ...
576 views

### Vibration absorber design: free body diagram of a mass-spring system [closed]

Trying to draw the free body diagram of this, any help would be appreciated. The $y$ is the amplitude of vibration of ground. Up is the positive direction.
943 views

65 views

### Find optimal configuration for Stirling Engine

I'm trying to figure out the theoretical calculations for a Stirling Engine system so I can determine optimal piston size, optimal piston displacement and number of pistons. I want to calculate which ...
761 views

### Exact procedure to mount a blanking spade near a butterfly valve

This is a follow on to my previous question about blanking spades. There's a gas pipeline with a butterfly valve mounted between to flanges. I want to work on one side (call it the inert side) and ...
158 views

### How can electrical noise be isolated in an Embedded System?

An input device sends a 20ms positive signal to perform an action. The signal is captured using an interrupt triggered on the rising edge of the positive signal. It appears that there might be some ...
68 views

### Identification of Foundry equipment

Good day! We (undergraduates w/o prior foundry experience) inspected a foundry for its health hazards, our problem is we are not permitted to be accompanied by a laboratory assistant, so we don't have ...
206 views

### The Horizontal Force of Water as it turns 180 degrees

For a National Board Exam Review: A uniform area jet travels to $600 \frac{ft}{s}$ and a $100\frac{ft^3}{s}$. What is the horizontal force acts on the water jet if it undergoes a $180^\circ$ ...
1k views

### Height Increase by a Floating Cylinder Over a Larger Cylinder

For a National Board Exam Review: A floating cylinder 8cm in diameter and weighing 950 grams is placed in a cylindrical container 20cm in diameter and partially full of water. The increase in ...
149 views

### Live motion simulation with respect to electromagnetic field software

Totally numb question from non-engineer, so sorry about that. For my little home project I need to create a matrix of solenoids, so I need some kind of simulation. I wish to be able to create metal ...
725 views

### Guidelines for motor shaft length and pulley engagement

Searched, but didn't find this discussed here previously. I'm upgrading a hobby-level CNC router (a Shapeoko 3) to have wider belts (it came w/ 6 mm GT2 (2 mm)), I'm going up to 9 mm (otherwise same ...
4k views

### Calculating the heat energy supplied by a superheater

I am answering this question: Steam enters the superheaters of a boiler at a pressure of 25 bar and dryness of 0.98% and leaves at the same pressure at a temperature of 370 °C. Calculate the ...
628 views

### How to create Embedded System Program from Scratch using Keil µVision? [closed]

I have been learning the program embedded systems using Keil µVision 4.7 free version from Mentor graphic. So far all the learning has be using projects that have been already pre-defined. This has ...
186 views

### Px26-015 pressure sensors output

I had a PC Mountable Wet/Wet Differential Pressure Sensor I used it to measure a pressure difference , I don't know how to convert its output to pressure !
7 views

### Modelling a rough surface of Ti6Al4V alloy in LAMMPS

I am trying to use LAMMPS molecular dynamics software to model the surface topography of a Ti6Al4V alloy that was created using a selective laser sintering process. This is to model the asperity and ...
10 views

### How to accurately use the approximation formula in a ritz approximation?

I have been able to do all the steps required in the question poised in the problem below to get to The issue I am running into is trying to use to actually obtain values to obtain numbers for my ...
8 views

### Low temperature flexible polymers

I'm working on a design project that will require a flexible component that will be operating at temperatures from $0^{\circ}$C to $-200^{\circ}$C. Are there any thermoplastic polymers that remain ...
For example, if I have an ultrasoundsensor 1 m above the ground while there is a wind speed of 5 m/s, a rough estimate of the horizontal displacement of the beam would be  t \approx 2 \frac{1}{343} =...