Load Definition and 1000 Threads

Hi, I'm reading about the discovery of the cosmic microwave background radiation and don't understand this part ... What power does a source called with liquid helium produce and how is it related to the amplifier circuits ? I don't get what they did and why ? Thanks !

Hello Can someone tell me basic equation of car engine temp. that depends on load. I don't need a precise equation - i need something simplified for simulation.

Hi all, I am new here as i want to ask something about an engineering project i am working on. I need a motor to rotate a 200 grams cylinder which will be hanging from the motor's shaft (vertically). I wanted less than 100 rpm so the motor I chose is a 2.1W 6V DC motor with a 50:1 reductor...

Homework Statement A beach mattress filled with air has a volume of 120 L and a mass of 6.0 kg. The saline water of the Dead Sea has a density of 1240 kg/m3. Assume that the mattress retains its shape and volume regardless of load. Homework Equations What is the maximum load the mattress...

Hi Guys, I'm a mechanical engineer looking for help with a structural problem, I work on-site at an iron ore mine in Western Australia. Typically once we design stands we get them fabricated then sent for certification. Certification involves a company putting the load which we wish to get...

Hello 2 all ! I am a student on electrical engineering, and i have the following problem to solve: Homework Statement An electrical circuit includes a dc voltage source with an internal resistance, and a load resistance. Determine the value of the load resistance R (with a precizion...

Homework Statement Sled dog to pull on a snowy sleigh horizontal road, the mass of its load is 210 kg. Snow and sleigh runners movement between the friction coefficient is 0.095. Dogs sleigh force exerted by the horizontal. acceleration of 0.13 m/s2? Gravitational acceleration is 9.81 m/s2...

Homework Statement A uniform beam, supported by a uniform strut, is loaded as shown in Figure (Attached). Using the unit load method, determine the value of the vertical deflection at C. BEAM: E = 205 kN/mm2, I = 90 x 106 mm4. STRUT: E = 205 kN/mm2, A = 1500 mm2. Homework Equations...

ok i loaded a composite laminate beam across the centre of a 1.44meter span with 415N load. This deflected the beam to a distance of 0.05m (5cm). Im having trouble calculating the stiffness from this. The composite laminate is 5mm of wood in a glass fiber sandwich with both the top and bottom...

What is the meaning of full load and no load, in the context of motor? Does the load here mean mechanical load?

hi, everyone know that when electrical load is applied to a generator, the generator slows down. Now my question is what actually slows the generator, what kind of force and how much is that force this question my sound weired to many but i need a very definate answer. thanks in advance

My husband found this fossil in a load of gravel that was delivered to our home here in northwest Nebraska. Can't say for sure, but gravel is probably from this area or maybe southwest South Dakota. The fossil is 5 1/2" along outside curve and 1 3/8" in diameter. You can see in the photos...

Hello, I am working on a project and I came across a question that is a little beyond my skill set. I am designing a support for a roof, and I have the force into the post, the length of the post and I need to determine what pipe I need, size, schedule diamter, etc. How do I go about this...

How do you calculate the stress in a cantilevered beam with a point load at the free end where the load has a large horizontal component loading the beam in tension as well as bending from the vertical component? And the beam bends far enough so it's slope will match the slope of the load at...

I need help analyzing a load scenario. I have a stiffened panel with fixed and pinned edges. There are fairly sturdy stiffeners equally spaced below the panel. There is a uniform patch load (pressure) that can be applied at any point around the panel. I need to determine the resulting stress...

Homework Statement Homework Equations So moment and torque are really the same, right? so the force times the distance. The Attempt at a Solution The force used has to be perpendicular to the line of the radius about O, so I assume I must do cos(36)*6lb*5in for the first. The...

I'm currently double majoring in ChemE and physics with the intent of going to grad school. This semester I'm taking 6 courses this semester totaling 19 hours, with about 10-15 hours per week spent in a research lab. I was considering dropping one course and taking it another semester, but I...

Hello, I design high powered rockets in our Tripoli rocket club. A particular plastic type of tube used is the Quantum 3.9 in dia plastic (sewer pipe) it is a thin wall design. http://www.publicmissiles.com/ They state that this basic tube is good for just .86 mach for compression loads...

So basically i have this powerful electromagnet that generates an electromagnetic field that can levitate another magnet and withhold a load of 12oz and still levitate: My problem is, I want to be able to use electronics and send wireless signals through this strong magnetic field. I can...

I'm new to the forum and hope someone can help me out. I've attached a picture so hope it works. I have a ladle for pouring metal, the mass of the ladle itself is 60kg and the max. mass of material that can fit in the ladle is 90kg. Total mass 150kg. The ladle has a tapered profile, so the...

Homework Statement A beam of mild structual steel has a solid square cross section of 100 mm and is simply supported by two supports 3 m apart. Calculate the dead load that can safely be supported when applied to the middle of the beam? Homework Equations The Attempt at a Solution...

Card provided one half of an a4 size (105mm x294mm) The card is fashioned into a beam and will be subjected to a load test. Rules 1. The card may only be folded to form a beam; you can cut it to suit your needs. It must NOT be rolled into a tube. Not permitted to use Glue, Adhesive tape...

Hello, I am attempting a problem in an older statics textbook an image of which is attached. No matter what I try, I get a solution of between 0.52 and 0.53 metres and was hoping someone could verify if the textbook answer of 0.48m is right or wrong. Thanks Heaps, Scott.

HI Any help with this problem would be much appreciated. I am designing a system in which a cart type machine needs to be able to carry a load up a hill with almost no help from the person pushing, My question is how do I calculate how much power is needed by the motor to move the load...

Homework Statement This is one half of a load cell I am analysing for an asignment. I have managed to calculate the stress in the beam using the equations below. I have approximated the centroid to be along the red line so that I can work out the distance for M, and then taken y or...

I was positive this is a simple uni style question, but I can't seem to work it out. I have a pneumatic cylinder that has an allowable 10N of side load acting on the end of the piston rod, at an extension of 0.1m. Now Let's say the cylinder is generating a force of P=200N. And the load it is...

Homework Statement hi, iv just got a few questions and I am hoping someone can help me:) 1) so the relationship between load and deflection is liner but how can i explain it further? 2) and I am not sure about the relationship between deflection and span? 3) and what happens to bending...

Hi, I am currently studying for my Masters Degree in Mechanical Engineering at the University of Strathclyde (Glasgow, Scotland) and as part of my final project I have to design a 'rig' with which to conduct experiments on climbing belays. The problem I am having is in designing the 'rig'. I...

Hey everybody! I am currently doing a project whereby I have to build a test rig for a certain corrosion sensor. As part of this rig, I have to incorporate a real time weighing mechanism to determine the weight loss of the specimen during corrosion, and log it in a PC. Hence, I am...

I was wondering the critical load vary as a result of forced vibration? Intuitionally, I thought the critical load reduced. But how to show it analytically, Any idea?

Homework Statement Hi , I got a MI problem for a given application. I need the failure load of a beam in order to derive the Merit Index. Does anybody knows the equation of the failure load of a beam ?

Homework Statement When a 2-kΩ load is connected to the terminals A–B of the network in the figure, the current through the load is IL = 10 mA. If a 10-kΩ load is connected to the terminals, IL = 6 mA. Find IL if a 20-kΩ load is connected to the terminals. 2. The attempt at a solution I...

Homework Statement Calculate the load current and voltage at "X" when Rl = 1K and Rl = 10K

Homework Statement I was asked to calculate the value of the resistance/phase of the load in balanced 3-phase purely resistive load. it stated that there are two different ways to obtain the solution. Homework Equations W1 = VL IL cos (30-theta) W2 = VL IL cos (30+theta) where...

what is meant by dc equivalent circuit and dc load line analysis? why we require these two ? advanced thanks.

Homework Statement A metal rod having a diameter of 10 mm is subjected to a repeated tensile load. The material of the rod has a tensile strength of 290 MPa. How many load repetitions can be applied to this rod before it fails if the magnitude of the load is (a) 5 kN, and (b) 11 kN...

Let me start off by saying I am completely new to this so forgive the simplicity of the question, may training is in commodities trading not science electricity. I have a power source (three solar cells) that are putting off 3.23 amps at 1.755 volts with 20 gauge wire. These measurements are...

Homework Statement This seems to a reasonably basic question to go through but yet I seem to have a bit of a mental block on it. so any help in the right direction would be great.. An I-beam is 10mm thick on the web and flange, is 6m high and has a Young's modulus of 200 GN/m2. The design must...

Hi all. I'm hoping someone can help me out on a (for me) tricky little issue. We are to use a communication module that we know will draw 5amp and must be supplied via a UPS. Tricky bit is that its 3.5km away so we need to step up the voltage at source and step down again at load. 400Vac is to...

Question: A beam is givn with an axial strain of 500x10^-6 and a Young's modulus of 200GNm^-2. work out the magnitude of the tenslie load. Rlelvnt equations: σ = YM x Axial strain My workng: So far I have worked out the stress of the beam to be: 36000000Nm^2 36MNm^2 But from...

Hi guys.. just want to ask for the formula for the computation of the total load current in the schedule of load in order to size the breaker accurately. Hoping for response.. THANK YOU. :)

Howdy, I am a mechanical engineering student with limited circuitry knowledge to start... Anyhow I have a [-500,+500]lbf load cell that is essentially a wheatstone bridge strain gauge. I want to give it either 9Vdc or 12Vdc excitation voltage since I have a regulated power supply that can...

Hello, so here is my problem. Homework Statement I am given tensile data, which is displacement (mm) and load (kgf). also I am given width(mm), thickness(mm), gauge length (mm) and cross-head speed (mm/min). How do i make a stress strain curve from this? The Attempt at a Solution...

Registered my classes for the upcoming Fall 2010 semester; these classes are only courses I need in order to transfer to USF. I've already completed all other requirements except Chem I + Lab. Registered courses: (17 credit hours total) Calculus III - M/T/W/TH Physics II + Lab - T/TH...

I have a c shaped hook that I am trying to find the maximum load before it starts to bend. Is there an equation for this. I have the yield strength and dimensions.

Is there a way to deliver constant power to a varying load. Any ideas will be appreciated.

I am working on a spreadsheet for designing a small footing to support 1-4 Radiation Portal Monitors (RPMs). These are vehicle scanners weighing in around 2-2.5 kips a piece and roughly 7.5'Hx3'Wx1.5'D. they are arranged on the footing in a few different configurations. aside from the self...

Here's my problem, I want to choose a motor to drive my load but I'm not sure about those choices as motor characteristics are given in torque. I want to know what is the MINIMUM Torque required to be able to rotate my load. I thought about T=rFsin(theta), but not sure how it would apply to my...

When calculating buckling force i have only found how to calculate it with a force applied to the entire cross section, how can you use Euler's if the force is applied just to an edge or point. Thanks

Hello, we are doing an activity at work to calculate what the shock load would be on a wire cable under the following conditions. There is some conjecture on how best to do this so we figured it would be best to ask some people with bigger brains than us ;) Hopefully the following info is...