How come steel is more elastic than rubber ?
A steel ball does not bounce as much as a rubber or tennis ball. How do you define elasticity? One fiber of a spider web is stronger than a steel wire of the same dia. - is this true ?
Please explain in some detail.
Question answered by Vincent G
Elasticity is the capability of an object to return to its former shape once a load inducing strain is removed.
If you were to drop a steel ball on a very hard surface, it would probably bounce higher than than rubber. If you drop it on a softer surface, because it would deform less, then the surface it is to bounce off will be the one deforming, so the bounce would be a function of the elasticity of the floor, not of the ball.
A strand of silk is indeed stronger than a steel wire of the same diameter. The reason is that metal uses metallic bounds which is not as strong as the covalent bounds in a macro-molecule like the ones in silk. This also explains why Kevlar, carbon fiber, and carbon nanotubes are also stronger than steel.
How fast do steel strings wear out on a steel string guitar?
I have had this steel string scoustic guitar for about 8 months. I have not changed the strings yet. But I keep thinking they are kinda worn out. But really. How long does it take until they wear out you need to replace new steel strings? Or do they wear out at all?
My name is not important
Question answered by
Typically strings if you're playing a couple of hours a day will last you weeks, say 3 or 4 weeks tops.
That's not to say that you have to change them, but they will have lost a lot of their life in that time frame.
If you haven't changed them in 8 months, i'd imagine that all the coating has now come off the strings and they feel like sharper pieces of steel wire.
A good idea is to get elixir strings - double the price but will last maybe 5 times longer. those kind of strings can stay on a guitar for 2 or 3 months and be relatively fresh.
How would America change is the Bessemer steel process was not invented in the 1800's?
Steel was invented by Bessemer using the right combinations and techniques. Thus Sky scrapers were built, rail roads, and tracks and much more but what would happen if it was not invented. I know no unions would exists but thats all could any one please help me?
Question answered by Whortleberry
I live in Pittsburgh PA, and during WW2 a whopping 95% of the WORLD's steel was made here. That would not be happening without the Bessemer steel process for sure. It is possible some similar process would have been invented -- inventions are odd that way, several versions of a significant invention seem to turn up around the same time. But to address your question, without that steel made by the Bessemer process you are so right about buildings, railroads, automobiles, etc., would probably have come upon the scene if at all, in noticeably different forms.
What makes the steel cents counterfit or authentic?
I have a few 1943 steel cents and looked them up on coin fact websites and they are worth a huge amount at some places. It also stated that you needed to be careful about counterfits. Does anyone know how to tell if there authentic or not?
Question answered by Set
According to the Official Red Book of United States Coins, even if your zinc-coated steel coin is counterfeit, it's no great loss. The most expensive one for this year is described as a "Boldly Double Mint mark" and a grade of MS-65 is worth $250 while a grade of F-12 is only worth $12.
If you tell me more about what you have I'll look it up in this book for you. This is the book coin dealers use to price their coins. At any rate, I doubt that anyone would waste time counterfeiting such an inexpensive coin.
I have many stainless steel appliances that need major cleaning. What is the best cleaner or home remedy?
All of my small appliances are stainless steel and they all have spots on them. I have tried a variety of cleaners but nothing seems to work. What is the best cleaner or home remedy that will work for this? I would like for them to look like new. Thanks!
Question answered by Backwoods Barbie
Stainless steel kitchen appliances look best when they're clean and shiny. To clean tough stains and cooking grease, and give them a dazzling shine, try the same detergent you would use when washing the dishes. One formulated to cut grease works especially well.This also works well for general kitchen cleaning.Waterless hand soap also works great as a polish, simply rub on, and polish - no rinsing...
How much is a steel penny worth?
I found a steel penny while walking on the boardwalk in Myrtle Beach, I've been wondering how much they are worth today.
I found a steel penny in pretty good condition while walking on the boardwalk in Myrtle Beach, I've been wondering how they are worth.
Question answered by answerman63
Hi. I'm a coin dealer in the Midwest. Your 1943 steel cent is neat and collectible, and will range in value from less than a dollar in well used condition (we sell average used ones for half a buck), to a maximum retail value of about $50 or so for an essentially perfect Uncirculated piece, and this value also varies depending on what mintmark the coin has (below the date). It will either have nothing (philadelphia), a D (Denver), or an S (San Francisco). The "S" coin is the scarcest of the three.
Keep your coin in some type of holder to protect it, and by all means don't try to clean or polish it; you'll ruin its value.
Hope this info helped.
What are the pros and cons of a steel roof, and how would you waterproof the inside to reduce condensation?
I have a steel roof on my house, with a plastic sheeting as waterproofing, however the condensation runs down the sheet and drips onto the upstairs ceiling.
Question answered by Sionk
It sounds like a shockingly bad roof! Sheet metal is often used because it comes in large pieces and can be quickly/easily assembled. And steel, aluminium or zinc will last for decades, if not centuries! But metal roofs are quite sophisticated these days. In your case the warm, moist air from your house is meeting the cold surface of the roof, rapidly reaching its 'dew point' and condensing as water.
If you insulate your roof, you need to make sure the insulation is waterproofed, otherwise it will get wet too and stop being effective. Normally a roof structure would also have a vapour barrier of some sort, to stop damp air reaching the roof structure in the first place.
So it is not just a case of sticking some insulation up there. I would also suggest you get an expert, such as a builder, to sort out the problem.
Should you "reseason" stainless steel cookware after the initial one you do when you buy it wears off?
I've recently bought a stainless steel electric frying pan and in the guide it explained how to season it - which I did. I've used it a few times and the seasoning has pretty much worn off. Should I redo it, and continue to redo it? What about my other stainless steel cookware - saucepans etc - that I've never done - is it worth doing it to them as well?
Question answered by carolathome2099
I have been cooking for 35 years, and I never heard of seasoning anything except cast iron. Stainless steel should be usable from day one after you clean off the dust from the purchase box. ;
How much do contractors charge to install steel roofing without removal of existing panels?
I have picked some steel roofing out and I was wondering what price range I should expect to get. I have two very simple gable roofs one is 17sq. and the other one is 8 sq. I am planning on going over existing shingles, so no removal is needed. I am going to purchase all the materials at a local steel supplier.
Question answered by cheezyhill
If you are going over shingles, only one layer I assume, you still have to have a layer of wood nailers. Your deck needs to be a minimum of 5/8" where as most roofs only have a deck made of 1/2".
Before you purchase the steel make sure your roof can accommodate the steel. Most can but it is a bit more complicated than just laying the sheets of steel down.
I would suggest you contact 3 contractors and ask for estimates. The cost for labor should be about equal to that of an asphalt shingled roof.
Where I live roofers charge by the square, between $35.00 and $45.00 per square plus materials. When you get a quote make sure they include all prep work etc.
What is the best steel for hunting knives?
That is, what kind of steel gives me the toughest and stain resistant knife. I hear Japan has reputable steel. Price is no issue.
Question answered by Taino Johnnie
If you are going to be using it to carve up big game with tough hides, then you should go with carbon steel over stainless. Carbon steel is harder to get sharp, but is stronger and retains its edge a lot better and longer than stainless. That being said, I would look for Schrade Old Henry knives. They are stainless, but are razor sharp right out of the box.