If you are in the search of cartoons on science and technology, look for Sidney Harris. Great! One of them is "Einstein Simplified".
Bought by the prof of quantumphysics at uni for the library. I suppose he did not know what he was ordering, but I loved it.
Bought by the prof of quantumphysics at uni for the library. I suppose he did not know what he was ordering, but I loved it.
I seem to have created my own self-destructive worm with my comment about deleting frames 19 and 20. It seems to have happened a few times. If left unchecked I fear it could have swallowed the whole site. I’ll leave my comments to moderators out of the text in the future.
Three other ideas for a backyard collider:
Basket balls
Sledge Hammers
Fake it and use capacitors discharging into electro-magnet coils.
Three other ideas for a backyard collider:
Basket balls
Sledge Hammers
Fake it and use capacitors discharging into electro-magnet coils.
Attachments
Very Dangerous!!
If you do use the idea of sledge hammers I would suggest that you stand a good distance away when in use. Hitting two equally hardened surfaces together will eventually cause at least one of the hammer faces to fracture or splinter in an explosive manner. And those flying splinters will be extremely hot too! Ask any metalwork teacher, I presume they still tell students not to do that.
/Paul, keeping the world a safer place (he hopes!)
P.S. I do like the idea of the Newton's cradle in the garden.
If you do use the idea of sledge hammers I would suggest that you stand a good distance away when in use. Hitting two equally hardened surfaces together will eventually cause at least one of the hammer faces to fracture or splinter in an explosive manner. And those flying splinters will be extremely hot too! Ask any metalwork teacher, I presume they still tell students not to do that.
/Paul, keeping the world a safer place (he hopes!)
P.S. I do like the idea of the Newton's cradle in the garden.
SuppersReady,
Sledgehammers and
http://www.selbst.de/8lexikon/grundwissen/werkzeugkunde/werkzeugkunde_bilder/0296_03.jpg
this hammer on the left side are usually made of not so hard steel. This causes the system to be not really elastic. The hammer deformates and doesnt splinter. They are made for hit hard surfaces like work with chisels (right word? - Meißel)http://www.stereo-optik-grosch.de/Photos/Meissel.jpg
The two hammers in the middle are dangerous to work with chisel or hit on hard surface - they are harder and something (mostly not the hammer but the chisle) may splinter.
Sledgehammers and
http://www.selbst.de/8lexikon/grundwissen/werkzeugkunde/werkzeugkunde_bilder/0296_03.jpg
this hammer on the left side are usually made of not so hard steel. This causes the system to be not really elastic. The hammer deformates and doesnt splinter. They are made for hit hard surfaces like work with chisels (right word? - Meißel)http://www.stereo-optik-grosch.de/Photos/Meissel.jpg
The two hammers in the middle are dangerous to work with chisel or hit on hard surface - they are harder and something (mostly not the hammer but the chisle) may splinter.
pinkmouse said:
I'm not so attached to them; it was just a couple of frames explaining elastic collisions. If anyone misses them I can stick-em back up.
Entirely my fault, lots of fumble fingers, and not so clear language.
-Dave
Unfortunately the harder the hammer the better! Makes the collision more elastic. Good thought about the safety. Wouldn’t be so good around children and small fuzzy animals.
Well is bearing steel harder than hardened steel used in hammers? I do see the problem with them chipping, Ive seen it happen before.(too many stupid people in my shop class)
And, yes the harder the steel is the more elastic the collison and longer and higher it would go.
Hmmm.. basketballs.. well maybe. If inflated at or above normal pressure they may work to some extent. But they are still less elastic than most any steel I know.
And, yes the harder the steel is the more elastic the collison and longer and higher it would go.
Hmmm.. basketballs.. well maybe. If inflated at or above normal pressure they may work to some extent. But they are still less elastic than most any steel I know.
I did some poking about for information on bowling balls.
They seem to start at about $45. The thing that really surprised me is the variety of colors and patterns available. In the $100+ dollar range there are balls with lights, clear balls with sculls, and just about anything else you can think of.
I found one site where a guy had cut up a ball und mounted a telescope on it. It did have a cork core.
More interesting is that in addition to weight (16 lbs max) there is a whole list of parameters that can be specified, including hardness. I don’t know however how picky you can get about these specs in the 45 buck range.
-Dave
They seem to start at about $45. The thing that really surprised me is the variety of colors and patterns available. In the $100+ dollar range there are balls with lights, clear balls with sculls, and just about anything else you can think of.
I found one site where a guy had cut up a ball und mounted a telescope on it. It did have a cork core.
More interesting is that in addition to weight (16 lbs max) there is a whole list of parameters that can be specified, including hardness. I don’t know however how picky you can get about these specs in the 45 buck range.
-Dave
Hammers are produced in a wide variation of hardening. Those sledgehammers, and what we usualy use are not too hard because else they would splinter at normal work. Some Hammers are very Hard, some use special fins of sintermetals - they are used to split stones or tiles. So a Hammer for geological purposes is great for elastic but bad for safety. The balls for bearings must be hard - else they would deformate and damage the bearing under nonstatic usage. But i dont see a problem if you use them not so often. A problem occurs if the surface of the hammer / ball hits very hard very often - depending on the quality of steel the surface will be hardened by the process of hitting. So it gets harder and harder until it splinters. For a hammer it will not be so easy to obtain specs for steel quality and behavieur under stress (hit) but a ball bearing manufacturer like SKF, INA, etc should be able to say very exactly what happens with the steel at which kind of stressing it - these numbers are essential for the specs of the ballbearing.
Thank you for investigating the bowling balls!
I have been trying around at second hand shops, but I havent looked too hard yet.
I think we will stick to balls of some sort, be it bearing or bowling.
So, if sometihng is harder is it neccessarily more elastic? When it gets harder then it splinters, has it reached full elastictiy before it releases the energy?
I have been trying around at second hand shops, but I havent looked too hard yet.
I think we will stick to balls of some sort, be it bearing or bowling.
So, if sometihng is harder is it neccessarily more elastic? When it gets harder then it splinters, has it reached full elastictiy before it releases the energy?
Try the local bowling alleys....they throw away balls all the time for minor defects that shouldnt affect your plan. I had quite a few discarded bowling balls some years ago...picked them out of the dumpster behind a bowling alley...close to a dozen I'd say.
zardoz
zardoz
I wonder how many 16 lb balls it would take to make a good turntable pedestal?
I had a room mate in college who spent considerable time trying to weld washers onto 1 1/2 “ ball bearings. He was a talented welder who worked mostly in oxy-acetylene.
The problem he consistently had was that in trying to get the balls hot enough to flow bronze or stainless rod onto, they would crack. He tried a makeshift oven for preheating and that didn’t seem to work either.
He couldn’t burn through em with the torch and he couldn’t drill em either. He concluded they were only goof for two things, bearings, and pinball.
While he was a good welder, he also wasn’t exactly the sharpest pumpkin in the patch. So while Vie said disparaging things hear about using bearings, it doesn’t mean that it can’t be done.
Ive noticed that on the desktop ball knockers there seems to be a light piece of sheet metal spot melded to the surface. Spot welding might be the key. I can also see that it might be possible to suspend the balls in some type of a wooden or metallic yoke.
Ive had a touch of insomnia lately. Otherwise I think I’d be embarrassed to have spent this much time obsessing about this.
-Dave
I had a room mate in college who spent considerable time trying to weld washers onto 1 1/2 “ ball bearings. He was a talented welder who worked mostly in oxy-acetylene.
The problem he consistently had was that in trying to get the balls hot enough to flow bronze or stainless rod onto, they would crack. He tried a makeshift oven for preheating and that didn’t seem to work either.
He couldn’t burn through em with the torch and he couldn’t drill em either. He concluded they were only goof for two things, bearings, and pinball.
While he was a good welder, he also wasn’t exactly the sharpest pumpkin in the patch. So while Vie said disparaging things hear about using bearings, it doesn’t mean that it can’t be done.
Ive noticed that on the desktop ball knockers there seems to be a light piece of sheet metal spot melded to the surface. Spot welding might be the key. I can also see that it might be possible to suspend the balls in some type of a wooden or metallic yoke.
Ive had a touch of insomnia lately. Otherwise I think I’d be embarrassed to have spent this much time obsessing about this.
-Dave
I agree.
Miging would likely do well. Cant suggest it to my old companion. Havent seen him in at least 15 years, and at the rate he was going I dont think there iss much left of his brains by now.
Miging would likely do well. Cant suggest it to my old companion. Havent seen him in at least 15 years, and at the rate he was going I dont think there iss much left of his brains by now.
hehe....don't be too sure about him. One of my friends in "HIGH" school was the biggest stoner....now he is the head "Robotics instructor" at a large college in Ontario. Some issues defy prediction 😉
zardoz
zardoz
Big suction cups might work too. The kind you commonly think of as toilet plungers.
This could make a good episode of Junk Yard wars.
Last time I saw my welder acquaintance was a few hours after an outdoor concert. He was naked and running over the top of a hill, poetically into the sunset, screaming at people who didn’t exists. Although his dad was a brilliant Orthopedic Surgeon, I have a tough time believing that this guy could ever overcome the flashbacks.
Speaking of wasteful life styles, it has just occurred to me that I’m at work, and better do some.
-Ciao.
This could make a good episode of Junk Yard wars.
Last time I saw my welder acquaintance was a few hours after an outdoor concert. He was naked and running over the top of a hill, poetically into the sunset, screaming at people who didn’t exists. Although his dad was a brilliant Orthopedic Surgeon, I have a tough time believing that this guy could ever overcome the flashbacks.
Speaking of wasteful life styles, it has just occurred to me that I’m at work, and better do some.
-Ciao.
hmmm well, I have access to a TIG welder, so that would most likely even work better.
Epoxy would work.. Especially some of the stuff they use to put speakers together.
I have many friends that are gonna have flashbacks. Who knows where most will end up? I know some are destined for greatness.. but others will be picking up trash at your local fairgrounds some day.
Epoxy would work.. Especially some of the stuff they use to put speakers together.
I have many friends that are gonna have flashbacks. Who knows where most will end up? I know some are destined for greatness.. but others will be picking up trash at your local fairgrounds some day.
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