Aluminum Definition and 282 Threads

Please look at the photo. In the photo, is a drawing of a casting furnace, with melted aluminum at the level of where the door starts. Assume that we have 2 different riser tubes inside this casting furnace, one with an inner diameter of 1.5" and the other one with an inner diameter of 2.5"...

Hello all, this is my first post here and I am glad to be a new member of the PhysicsForums community! I have a question which I believe will be a good challenge for the bright minds here: I am trying to create a system of Al-Air batteries to power a motor which will be hooked up to an rc car...

http://en.wikipedia.org/wiki/Pyrotechnic_initiator

Homework Statement What are some different ways to find the thickness of aluminum foil? Homework Equations I have already calculated it by using the method that requires us to find the volume, given the density, and dividing it by area. So i need new ways to do this same problem...

Hello, I'm a Process Engineer in an Aluminum Foundry and haven't been able to find the formula to solve the following problem and I'm hoping someone here can help. I've been digging through old textbooks, thinking this should be simple, but w/ no luck. - Thanks in advance. I've got a vessel...

Homework Statement An aluminum engine block has a mass of 110 kg. If only 20% of the heat produced in the engine is available to heat the block, what mass of octane is required to raise the temperature of this block from 15 celcius to 85 degrees celcius? c(Al) = 0.9 kJ/(kg . degrees celcius)...

Failure analysis of a 2" OD solid 6063 aluminum round bar I have a 6 foot piece of 2" OD solid 6063 aluminum bar that is supported at both ends. Hanging from the center is a 5000 pound weight. What techniques and equations would be used to determine if the aluminum bar will successfully bear...

This is a really simple problem, but I just can't remember how to combine the container and the water. Homework Statement An aluminum container weighing 200g contains 500g of water at 20*c. A 300g shot of the same aluminum at 100*c is put into the water. The specific heat for the aluminum...

I built a catapult (trebuchet actually) last year for the "Punkin Chunkin" where you throw pumpkins for max distance. This year I am planning on a slightly larger one and need some advice on aluminum. We basically use a primitve crane idea to lift the weight up rather than using a hoist or...

Homework Statement A hollow aluminum cylinder is 2.50m long and has an inner radius of 3.20 cm and an outer radius of 4.60 cm. Treat each surface (inner, outer, and the two end faces) as an equipotential surface. At room temperature, what will an ohmmeter read if it is connected between...

I have an Aluminum bank about 5" x 5" by 1/2" deep. Within the bank are all sorts of rows in which components are installed. I would like to make a mold of each individual bank. Does anyone know of any materials that will work for making a mold? My first thought was silicon, but wondered...

Hi all: I am fresh to engineering and have basic question. I have a 100 inch length and 40 inch wide & 6 in depth plate , it has honeycomb structure what I mean 0.125 inch face sheet of aluminum on either side and rest (6-.125*2)is honeycomb made of alumnium.It is supportted on 4...

Hey guys I need a little help trying to identify or getting a good conclusion of what kind of aluminum I have here. These aluminum was grind and finally polished with aluminum oxide of 3 microns. After the etching of the alloy with Keller's Reagent for a couple of seconds we took the...

Hey guys, I'm working on a project and am looking for some fatigue data for aluminum alloys, A356-T6 in particular. I've looked through the MIL-5 and Aerospace (Cindas) handbooks and haven't found any decent information. The textbook I have "Mechanical Engineering Design" by Shigley and...

Two small aluminum spheres, each of mass 0.0250kg, are separated by 80cm or .8m. If the atomic mass of aluminum is 26.982 grams per mole and its atomic number is 13 then how many electrons does each sphere contain? How many electrons would have to be removed form one sphere and added to the...

I have a question: does anyone know whether the aluminum surface treatment Allodine 1200 can give rise to outgassing when used in high vacuum conditions ? As I understand it, it is a chemical deposition of CrO3 on the Al surface.

Suppose that I have an aluminum cube with side lengths 10 cm. Suppose that I uniformly and continuously apply a temperature of 60 degrees celcius to one of its sides. The medium surroudning it is air with a temperature of 27 degrees celcius. After t seconds, what is the temperature of the...

Homework Statement Verbatim from the book: A square loop is cut out of a thick sheet of aluminum. It is then placed so that the top portion is in a uniform magnetic field B, and allowed to fall under gravity. (In the diagram, shading indicates the field region; B points into the page.) If the...

Application: Aluminum gooseneck horse trailer incorporates (2) 6 foot long 8 x 2.25 x .25 6062 aluminum C channel beams (sitting long side vertical) from each of the front corners of the box, coming to a point (forming a triangle with the front edge of the box) where they are welded together and...

Hi everyone! I have a question about mechanical properties of the materials. As I understand, when in metals microstructure the grains size decreases, the mechanical properties increases, specially metals strengthening. But I have a discussion with one Prof. who says that this is a minor...

[SOLVED] Aluminum Boats and Buoyancy. All right, here we go. I'm stuck doing a "Lab Practicum" which has this specific task: Build a boat out of aluminum foil alone. Find the maximum about of mass it can hold without tearing, capsizing, or just plain submersing into a bucket of water. The...

[SOLVED] sphere problem Homework Statement One cubic meter of aluminum has a mass of 2.70 x 10^3 kg, and the same volume of iron has a mass of 7.86X 10^3 kg. Find the radius of a solid aluminum sphere that will balance a solid iron sphere of radius 1.80 cm on an equal-arm balance...

Recently, we purchased a relatively brand new high performance car engine to swap with our regular car engine for the purpose of gaining more horsepower. I need to find out the probability of corrosion of an aluminum alloy (possibly 319.0) part of a complete engine block brought to the shop...

My adventure of watching aluminum age... zzzzz... This is really just a post about something interesting I've been doing. Not a question thread or whatnot, which is why its in this section. ____ I have been using aluminum rings to make small pieces of maille armour. The rings are very...

I don't know if this is the place to post but I was wondering if there is anyone out there that is experienced when it comes to aluminum corrosion. I am about to take an Auto Repair shop to court because I gave them an engine with 5,000 miles on it to swap into my car and when I received my...

Hello, When purchasing aluminum standoffs you can get them with many different finishes. Which finishes have the lowest resistance and offer protection against corrosion? The following link lists finishes available from a popular electronics hardware manufacturer.

Melting Ice With Aluminum?? Homework Statement How many grams of aluminum at 90 degrees C would have to be dropped into a hole in a block of ice at 0.0 degrees C to melt 10 g of ice? Homework Equations Q = (m)(c)(deltaT) c of aluminum = 0.9 c of ice = 2.1 c of water = 4.186 333.7...

[SOLVED] Charged Aluminum Spheres Homework Statement Two small aluminum spheres, each of mass 0.0250 kilograms, are separated by 80.0 centimeters. How many electrons does each sphere contain? (The atomic mass of aluminum is 26.982 grams per mole, and its atomic number is 13.) Homework...

I had better not say the company name, but a high profile company had an employee who was exposed to toxic fumes for years. As a result, at least according to popular opinion, his brain was so damaged by the fumes that he ended up wearing aluminum foil under his hat to keep the aliens living in...

Homework Statement A piece of aluminum wire has a resistance of 20C, 15.5 \Omega. If this wire is melted down and used to produce a second wire having a length four times the original length, what will the resistance of the new wire be at 20C? (Hint: The volume remains the same)...

I'm having difficulty with a problem on MasteringPhysics (such wonderful software...) and as a last resort I'm posting on here. This is, I'm sure, a really simple problem but I'm getting no kind of feedback from MP and there isn't an example problem like this in the book. Homework Statement...

I'm having difficulty with a problem on MasteringPhysics (such wonderful software...) and as a last resort I'm posting on here. This is, I'm sure, a really simple problem but I'm getting no kind of feedback from MP and there isn't an example problem like this in the book. The Problem Two...

Does anyone know a good method of producing Aluminum Chloride in liquid form? I need to prepare a 25% Aluminum Chloride Solution for my presentation. Any help would be greatly appreciated.

How would one go about distingushing between magnesium alloys and aluminum alloys (physical characteristics)?

Periodically, I receive useful information on materials. This short note was sent from ASM. Two most common methods to increase the strength of aluminum alloys are to: Disperse second-phase constituents or elements in solid solution and cold work the alloy (non heat treatable alloys)...

A 2.65g aluminum bullet at 31.4°C is fired at a speed of 209 m/s into a large block of ice at 0°C, in which it embeds itself. What quantity of ice melts? Q=(9.00E2)(.00265)(31.4)=74.889J 74.889J=m(33.5E4)=2.23E-4kg so i get a final answer of 2.23E-4kg but its wrong. i think I am either...

"Pellets made out of aluminum and gallium can produce pure hydrogen when water is poured on them, offering a possible alternative to gasoline-powered engines, U.S. scientists say." continued... http://news.yahoo.com/s/nm/20070518/us_nm/fuel_hydrogen_dc

A cylindrical aluminum pipe of length 1.36 m has an inner radius of 1.80 10-3 m and an outer radius of 3.00 10-3 m. The interior of the pipe is completely filled with copper. What is the resistance of this unit? (Hint: Imagine that the pipe is connected between the terminals of a battery and...

I have noticed that the mechanical properties of aluminum vary depending on if it is provided as sheets or extrusion. Do you know why?

I'm wondering if anyone is willing to share some comparison numbers between any aluminum's hardness value and its impact resistance value. A friend and I are disagreeing on something, I think the harder the treatment is, the more brittle it becomes. He doesn't think so.

Homework Statement A man strikes a long aluminum rod at one end. Another man, at the other end with his ear close to the rod, hears the sound of the blow twice (once through the air and once through the rod), with a 332ms interval between them. How long is rod? Homework Equations...

A 0.4 kilogram sample of Aluminum at 115 degrees Celsius is put into a container containing 0.5 kilograms of water at 15 degrees Celsius. Neglecting the small amount of energy absorbed by the container and knowing that the specific heat of Aluminum is 900 kJ/kg*C, and the specific heat of the...

I'm having extreme difficulty identifying some precipitates I obtained from combining a solution of Aluminum Nitrate and Sodium Carbonate. The result was an orange precipitate. I have searched high and low (complex ions, decomposition, redox, etc) but I can't figure it out. Please HELP!

I had this posted in the wrong forum...srry :blushing: I need to contact who ever would be authority on propeller design and applications. In short, the Idea is to build a Aluminum prop, 1.2 meters diameter with weight of about 1000 grams. Targeted application would be primarily for...

I need to contact who ever would be authority on propeller design and applications. In short, the Idea is to build a Aluminum prop, 1.2 meters diameter with weight of about 1000 grams. Targeted application would be primarily for powered para gliders. I need some arguments for and against...

I am trying to determine some general cantilever equations. I have an aluminum beam extending out 235 mm (L) from an aluminum block. The beam is 25 mm wide (W) and 3 mm thick (H). A force is applied at a point approx. 200 mm from the block and I am interested at a point 25 mm away from the...

Homework Statement In an experiment, 240 g of aluminum (with a specific heat of 900 J/kgK) at 100°C is mixed with 40.0 g of water (4186 J/kgK) at 20°C, with the mixture thermally isolated. a: What is the equilibrium temp in C? b: What is the entropy change of aluminum? c: What is the...

Help explain to me the understandings behind running an iron flywheel compared to an aluminum flywheel (or vice versa) in a street car and or drag car. An iron flywheel (21lbs for example) will help a car get off the line better from a launch compared to a lighter flywheel (11lbs for example)...

"An aluminum calorimeter with a mass of 100g contains 250g of water. The calorimeter and water are in thermal equilibrium at 10.0Degree C. Two metalic blocks are placed into the water. One is a 50g piece of copper at 80.0 degree C. The other block has a mass of 70.0g and is origionally at a...

An aluminum cylinder weighs 1.01 N. When this same cylinder is completely submerged in alcohol, the volume of the displaced alcohol is 3.88 × 10-5 m3. The apparent weight of the cylinder when completely submerged is 0.778 N. What is the specific gravity of the alcohol? m=W/g...