Aluminum Definition and 282 Threads

Background info: This is for a trebuchet I plan on building. Obviously lighter is better especially for the throwing arm which is why I need your help in figuring out that problem, so I can get it as light as possible without it having even a remote chance of failing. If there's information...

I could not find anything online indicating that such was so, but... If electrolysis of a solution of zinc sulfate results in zinc and sulfuric acid, is it also correct that electrolyzing a solution of aluminum sulfate will result in aluminum and sulfuric acid?

I have sintered powdered Aluminum at temperature about 540 Celsius, can i anyone tell me how it should be characterized ? Meaningly, has it been sintered successfully or not !

Hello and thanks in advance for any help given. I have attached a drawing of sorts (please excuse the novice attempt) for a design I am working on to pivot a 40"x60"x1.5" item framed mirror) using an actuator. My question is specific to the part of the design marked "B" in red. Basically this...

what happens to your tongue when you lick an aluminum ice cream scraper just after it has been used?

Hello Rockwell B or Rockwell E - which one is better to measure the hardness of aluminum alloys? Thank you!

I'm torquing a stainless steel 4-40 socket head machine screw into a 6061-T6 aluminum threaded hole. I've located some torque tables that give differing values for different screw materials, but I'm wondering how this applies since I'm going into a threaded hole of a softer material. We've...

I want to cast a part out of Aluminum (from scraps). Is there anything I can throw into the melt mix to make it come out stronger (not as gummy and soft) ?? Some sort of ceramic I'm thinking? Very fine sand-like stuff (e.g. CaCO3)? Any suggestions for heat treatment too? The part will be a...

I've seen various documentaries where WWII-era aircraft wreckage has been sitting out in the jungles on Pacific islands for over sixty years and everything that is aluminum is in really good shape. Little bit of scrubbing the algae, mildew, and moss off of it, and it would look like new. I...

Homework Statement I have a basic understanding of electrostatics. I know that when I rub a balloon with wool, both the wool and the balloon will become charged. I know that if I bring my charged balloon near neutral paper, the paper will be attracted because of charge polarization. I thought...

In this article http://www.adlabs.com/library/battery.html" (read PDF) an author proposes high energy density rechargeable aluminum-based batteries.They are based on reaction of Aluminum with Iron (or other metals) and oxygen.I still trying to understand why autor is so sure that such type of...

Aluminum has a density of 2.699 g/cm3 , and the atoms are packed in a face-centered cubic crystal lattice. Find the mass of a unit cell. -----I already know the answer is 1.792*10^-22g/unit cell I have a question about how you get the answer: I know you multiply 4.480*10^-23g * 4 atoms/1...

How to determine in a cast aluminum part its consumed fatigue life? Lets imagine I get a cast aluminum part that looks good, but I have no idea for how many km it has been used (automotive). Which kind of non destructive tests or methods could I use to determine the consumed fatigue life, and...

Homework Statement I think this is more of a gen chem question, but this is for my physics lecture. A student drops two metallic objects into a 240 g steel container holding 62 g of water at 24◦C. One object is a 186 g cube of copper that is initially at 75◦C, and the other is a chunk of...

Homework Statement OMG, Embarrassing typo ^ *HEAT not HEART. :) Sorry! In any case, A construction worker uses a steel tape to measure the length of an aluminum support column. If the measured length is 18.6 m when the temperature is 21.2 C, what ist he length when the temperature rises to...

I recently had some discussions about the use of aluminum in a ultra-high vacuum (UHV) apparatus. There seem to be those who believe Al is good in UHV and those who believe it is bad. I was wondering if anyone has some authoritative source for information on this. Those who believe it is bad...

I am currently designing an aluminum-air battery(e.g. http://en.wikipedia.org/wiki/Aluminium_battery) for a lab class that I'm taking. It seems like the prototypical design for one of these batteries is to have an aluminum foil anode beneath a paper towel soaked in salt water as an electrolyte...

My knowledge of AC voltage is very basic but I have a question. I stumbled upon this by accident. If you take a piece of aluminum, stick one one end into the ground just a little, say 1". Then take a volt meter, stick one lead into the ground, the other lead anywhere on the aluminum...

I'm a little confused and i would appreciate if someone could enlighten me on how there are some claims of certain manufacturers that the strength or load bearing capacities of aluminum I beams can surpass steel I beams? is that false advertising or can that statement ring true? Please help.

Hi all, I've got a pressure vessel that is just an aluminum cylinder with flat caps welded to the ends. Currently, I doing some FEA to properly size those flat caps for a certain factor of safety. Since the pressure in the tank will cause a uniformly distributed load on the wetted surface of...

I've never taken physics, and I'm not even sure this is physics. :S On the hint it mentions, think of freshmen physics, but I honestly have no clue. Could someone help me out on how to even start this problem? Estimate the weight savings if a typical automobile engine (100 kg) is made of...

I'm trying to think of a way to take a piece of aluminum foil and chemical separate the atoms 1 by 1. I was originally thinking of trying some sort of Electrolysis type reaction by turning the Aluminum into Aluminum Oxide... though I'm still searching for the chemical reaction/method to...

Homework Statement A hollow aluminum cylinder is 2.5 m 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...

Hi - I hope this is the correct forum for this question... I'm building a camera jib arm - essentially a 1.5" sq aluminum tube, 15' long, with a pivot point in the "middle". A camera goes on one end, and counter weights on the other. I'd like to know the limits of the aluminum so it...

so i have to do a independent lab for physics which determines how many appliances will melt aluminum wire when in a circuit. i'm having trouble getting started with how to set everything up, does anyone know how i should go about it?

I’m looking for information regarding the use of composite aluminum sandwich paneling in the construction of superstructures. I have found quite a lot of information regarding the implementation of foam cores with glass skins in place of solid fiberglass; however I have been unable to find...

Hi, materials engineering noob needs Your help. I've got a problem. What i need to do, is to somehow join aluminum and ceramics in a rather dynamic application. Ideally, i would like do achieve it without using any other substance, i.e. glue. What i need to work with: aluminum rod, about...

I guess this is more of a Chemistry question than anything, but didn't get a response in that forum... I had gas spill onto the floor of my aluminum boat this winter, and it sat there for a few months... when I pulled the boat out this spring there was a rust looking residue on the aluminum...

Homework Statement The Shear modulus for aluminum and copper are 25GPa and 35GPa, respectively. An aluminum and copper pole, both the same length are subjected to the same shear force at the top of each pole, bending each pole a different angle y. Which pole has a higher angle of deflection...

Homework Statement An aluminum beam 79 m long and with a cross-sectional area of 0.095 m2 is used as part of a bridge. The beam is clamped rigidly at both ends. (a) If the temperature of the beam is increased by 29°C, what is magnitude of the extra force exerted by the beam on one of its...

I have a question regarding what material type and thickness could support a given load most cost effectively. Weight of the part will also be a factor in the cost due to the wacked out freight charges these days. I have no idea where to locate the information that I need or a formula so...

Parabola for 18" aluminum mirror Help; need to configure inputs into parabola formula to machine an 18" dia., 1.5"h aluminum disc. for use as primary objective mirror in telescope.

There are a lot of youtube videos and online forum speculations that suggest that tossing a disassembled spark plug at a car window will cause the window to spontaneously shatter. The supposed justification is that tempered glass can easily withstand from softer materials than it (such as the...

Hello, I'm Mike from over on the EE board, and I'm looking for good advice regarding welding aluminum foil. I had a vendor that used to do so inside his capacitors and he even bonded the foil to solderable leads. Any ideas are certainly welcome, Best Regards All, Mike

Hello All, I'm normally over on the electronics forum, but recently I had a problem crop up regarding the spot welding of aluminum foil. I've seen the end results of the process, so I know it can be done cleanly. For that matter, I've seen pieces that predate laser welding, etc, so I'm...

[SIZE="2"]Moderator's note: thread moved from Homework Help forums to Mechanical Engineering forum. Welcome to PF an1mal_69 :smile: Apologies, this is not homework, but a real world problem. Homework Statement Front suspension system, consisting of 2 wishbones supporting a wheel hub via...

I am interested in calculating the temperature rise of a 10 mil aluminum bond wire. Assuming relative purity of the wire, I feel like I should be able to use the method I have worked out below. If anyone can advise on the accuracy of my method, it would be greatly appreciated. Method: 1...

I want to reduce the weight of a square aluminum tube, 36 inches long, 1 inch square, and 1/16 inch thick, while maintaining as much strength as possible. The tube will be used at the body of a radio-controlled airplane. Where should the holes be (what part of the tube), how big, and what...

Someone knows what is the most commonly used aluminum alloy in baking wares? Thanks for help... :)

Sirs, I need to make a pump to draw molten aluminum from one container to another container. The first container height is 1.5m. I wish to us a screw enclosed within a cylinder and powered by a motor. Can anyone help me with the detail design of the screw and cylinder? I welcome any other design...

I bought one of them grow lights for hydroponics recently - 400 watts Metal Halide and I wanted to know if a makeshift aluminum foil wall would be good enough to block out the radiation coming from the lamp. I know the outer glass shell of the light bulb already acts as a filter but i just want...

why is the 0.2%proof stress particularly useful for aluminium and how to calculate it?

very cool. & it isn't even the 23rd century yet. i can't even find the part of the abstract where they say they turned it transparent though :-p (i guess it's the 3rd sentence?) http://www.nature.com/nphys/journal/vaop/ncurrent/abs/nphys1341.html...

does shiny aluminum foil reflect infrared photons.

Homework Statement Suppose 69.3 J of heat is added to a 121 g piece of aluminum at 22.5 C. What is the final temperate of the aluminum? Homework Equations Q = m c (T - T1) I think, but I am only given 1 temp. The Attempt at a Solution There are examples that are simialr in my...

Hello. I have recently decided to create the silicon dioxide thermite reaction for a monitored school project. It is my understanding that the heat produced by this reaction per mole is less than the activation energy for the reaction per mole, and so I must mix in sulfur in order to encourage...

(This is not a homework question...it's a theoretical question based on an experiment that was conducted.) If you have an aluminum block and a copper block of equal mass, but the copper block is 100 degrees C and the alum. block is 0 degrees C, they reach roughly 30 degrees C at thermal...

funny but I could not reach the info from net quickly.

1. I need to know which compound out of Copper Sulfate, sodium chloride, potassium iodide and magnesium sulfate will be the best catalyst for the reaction between ALuminum metal and Hydrochloric acid. 2. The chemical equation is : 2Al(s) + 6HCl(aq) -> 2AlCl3(aq) + 3H2(g) 3. I...

Trying to pick a product for my project and would like to get some opinions from the knowledgeable people in the forum. let's say I am using 2 pipes, one made from PVC and the other from Aluminum to lift an object of x kilos. Both pipes are of the same lenght, size, and thickness. Which...