Mechanical Engineering

Material science is very important to welding.

The way a metal is heated and cooled determines its properties. When welding is done incorrectly it can result is very weak material around the weld. A very common place to see the effects of welding is around the weld of two pipes. After a period of time, a rust ring can form on either side of the weld (not right next to it, but a small distance away). Although the weld is strong, the surrounding material is weaker.

Formula for the volume Expansion for a solid is αV=1VdVdT and Isotropic materials is αV=3αL.

In a machining process, a sharp tool cuts through some workpiece, generally by skimming along its surface. The "depth of cut" is the measurement of how far beneath the surface of the workpiece the tool is penetrating. The "chip thickness" is the thickness of the material being cut away.

One might think that the thickness of the removed material would be equal to the depth of cut, and sometimes it is. In that case, the chip thickness ratio is 1.0. However, depending on many other factors (cutting tool geometry, material properties, etc.), sometimes the chip will be thicker or thinner than the depth of cut, due to deformation of the chip as it is removed. This change of thickness as the chip material is being removed is defined as the "chip thickness ratio."

Well lets start with what the term Bump means. Bumping is a technique that locksmiths and now criminals are using to open locks instead of the old standard method of picking them. In short a person has a key that the same type as the lock you have i.e. you have a Kwikset lock and key, the person bumping the lock would also use a Kwikset key. They would put their key into your lock and use a small hammer or object to hit the key which causes the pins in the key cylinder to jump out of he way and allows the person to turn your key cylinder and unlock your door. Thus why it is called bumping. So the first part of the Bump Proof means that the lock is not able to be bumped. The second part ANSI grade 1 is a rating used by the American National Standards Institute to determine the amount of wear and tear a lock can handle. Grade one is the highest. So the second part of the question means that you have the highest grade of deadbolt. Typically a Bump proof lock is a keyless lock using a keypad for entrance rather than a key way thus eleminating the ability to be bumped. I am including a link to one I found online at GoKeyless.com http://gokeyless.com/product.php?id=131&main=1 I do not know if it is a grade one or not but it is only one example. You can buy other bump resistant keyway locks and deadbolts but unless there is no keyway at all it is really tough for it to be 100% bump proof.

The fuel sample in the open cup is exposed to air,thereby decreasing it's vapor pressure when compared to the same in a closed cup.

i guess your buying a BMW.

brushed aluminum is basically an aluminum that is brushed to make it smooth.

abraded is like a snake skin but not a snake!!

Wood has relatively low tensile strength - about 7 MPa (6000 psi) compared to say steel which is 70MPa (60,000 psi) or more.However, wood has a higher strength to weight ratio than most other materials since it has such low density.

Rotational 90 degree asists.

Use a magnet. Magnets stick to steel but don't stick to aluminum. Stainless is very weakly magnetic at best. Best to identify aluminum from stainless by weight (aluminum is much lighter) or by hardness (aluminum is much softer; scratches more easily).

***************** Though magnet test can show the difference between magnetic steel and aluminum, it cannot show the difference between non-magnetic steel and aluminum. In this case you can tell the difference by 1. weight , since aluminum has density 2700 kg/m3 and steel (magnetic or not) 7500 2. hardness, using a knife or something similar, since aluminum is softer than steel

In the laparoscopy procedure, the abdomen is filled with carbon dioxide gas so that the abdominal wall balloons away from the uterus and tubes. The surgeon makes a small cut just below the navel and inserts a laparoscope, a small telescope-like instrument. A second incision is made just above the pubic hairline to allow the entrance of the instrument that will cut, sew or burn the tubes. The surgery takes about half an hour. The lazer procedure is a minor operation (often called "Band-Aid" surgery). The procedure is usually done as an out patient in a hospital. It usually takes about 20-30 minutes for the entire procedure. It is made up of two parts: getting to the tubes and then cauterizing (burning) or cutting them to block their ability to allow sperm and egg to pass. ==New Answer== I don't know who replied to this question but they didn't state all the ways that the tubes can be "tied". In December of 2005 I had my tubes "tied" by laproscopy and the OB did it with a band basically like a rubber band that they "tie" around a section of both my tubes. I am currently 23yrs old and have a 9month old son and have missed 2 periods and showing signs of being pregnant (but waiting a lil longer before I take a test). The risk of getting pregnant is a lot higher then anyone thinks after getting a tubal especially if you have previous health problems like I do with having ENDOMETRIOSIS! Also 99.9% of OBs don't tell their patients the risks involved in getting your tubes tied that in can actually increase your risk of ovarian cancer (depending on how they were tied) and of course the risk of getting pregnant and having an ectopic pregnancy. I had my tubes tied after having pre-eclampsia that went into HELLP syndrome with my son and almost died when I had him. There was no other choice for me. I thought after I had him that was it no more kids, if I did get pregnant it would surely kill me next time and look at me now. My husband and I don't know how we can afford another baby but if I am pregnant then we will be happy but terrified as well. For any woman that gets pregnant after having her tubes tied she can go back and file a "wrongful life or wrongful death" lawsuit on the doctor that did it if they want to. I think all women should know that.

it hangs the bridge

cutting speed (Vc)= (Pi x D x N)/12 = (pi x 3.5 x 55)/12 = 50.39 feet/min.

You're in the class to learn this not to put it on wikianswers...

Prandtl number is dimensionless number, denoted by Npr.Npr = Cp (viscosity)/(thermal conductivity)

Cp - specific heat, J per ( Kg Kelvin)

viscosity in poise (gm per( cm sec))

thermal conductivity in Watt per (meter kelvin)

Prandtl number is important in heat transfer.

Yes, it is possible , however it depends on the type of joint you are trying to weld, and how structural you need it to be . Generally the low amperage of these machines lack the penetration needed for thicker metals. But with proper joint preparation IE. beveling the edges, and using flux core wire , along with multiple passes , you could achieve a good weld. Also it should be noted that these machines have a low duty cycle , meaning that, in order to weld thicker metals the machine must be used at it's highest settings , effectively shortening the amount of time you have to make a certain length of weld, which in this case is short. Usually a 20% duty cycle means at it's high settings , you can only weld 2 mins. out of every 10 mins, this is to avoid overheating the machine.

Since the energy stored elastically by an object is represented by E = 0.5kx^2 a simple calculation can be done to see how much energy is being stored by your slingshot on any given pull: The x value represents the distortion in meters (ie. the difference between the length of the band when it is in its resting state, and its length when it is being pulled). The k value is the elastic constant for the surgical tubing. This value can be looked up in a chart or table, or can be calculated experimentally (with the use of the equation: F = kx, again where k and x represent the elastic constant, and deformation, respectively). Once you have your values, simply substitute them into the equation and solve. The calculated energy stored, will have its units in Joules (J).

There is no difference ,both are same

tintu puthur joseph

Types of enclosures are as follows:-

1)open type enclosure-(it is open from both the ends)

2)protected type enclosure-(not completely open from both the ends)

3)drip proof type enclosure-(does not allow liquid or moisture to enter)

4)totally enclosed enclosure-(does not allow foreign particles to enter)

5)pipe ventilated enclosure-(used for providing ventilation for motor)

6)flame proof enclosure-(used when motor is to be used in explosive atmosphere)

Plies are the construction materials use to make a tire. The body ply is a sheet consisting of one layer of rubber, one layer of reinforcing fabric, and a second layer of rubber. The earliest textile used was cotton; later materials include rayon, nylon, polyester, and kevlar. Passenger tires typically have one or two body plies. They can also be reinforced with steel. Body plies give the tire structure strength. Truck tires, off-road tires, and aircraft tires have progressively more plies. The fabric cords are highly flexible but relatively inelastic.

No

So, the main purpose of an insulator is to isolate the current from being ground anywhere before the circuit completion. These insulators are essential for safety and they prevent direct contact from live wires.

My next guess, in this form of troubleshooting, would be a wiring harness problem / fuse problem / pass through or plug problem. IE The computer is telling something to work, but the signal is not getting to the right place.

the hottest point of the jet engine is the combustion chamber

You multiply the number of welds by the diameter of the pipe that those welds are applicable to.

Yes... typically killed carbon steel is used. However, you will need to watch out that your lean amine system is not too lean. You want a level of H2S in there that will allow a protective layer of iron sulfide to lay out in the piping and not be removed. If the lean amine loadings are too low in H2S content, that layer can be removed and it will no longer be protected. In this case be watchful of higher velocity areas. Example: small bore piping, reducers, tees, elbows... pay attention to the flow directions and check your areas of "impingement" with Ultrasonic thickness measurements or profile radiography.