Why non-metallic object cannot be magnetized?

[bluedes]

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aw okeh, so tungud kay solid ang object ang ilang atom kay almost dili na jud lihukan plus tiwasan nga very low ang temperature.... aw okeh.

ahhh okeh2x ^_^

slamat sa inyo tubag part!

it has more lots to do with the actual 3D structure of the molecules of an atom/substance..
if it allows for smooth layers of compaction, the van der waals attraction between them is pretty uniform, so mu-compact jud sya na hard type solid..

but take a look at other molecules na non-solid, their molecular structure does not really allow them to pack together.. water is V-shaped with its oxygen and two hydrogen.. metals really pack together na tight kaau ilang layers.. couple this with van der waals forces, solid jud imong material.

now i understand also why microwave seems to explode metals while it does not do so for non-metals or polyethylene plastics or even glass.. these non-metallic substances have molecular structure that allows for vibration between compaction to contain the kinetic energy without disrupting its *seemingly* solid state.. (in other words, there is still space in between compaction of molecules because their molecules have "bends" in them that will accommodate the energy states)

Note: i'm not sure if i'm using the right terminologies here.. *compaction* and *3d structure*.. di man gud ni major nko.. maybe fritzd has the more correct terminologies to be used..

i suppose if you put water in the microwave for a long time, it would seem na still kaayo ang water, but be careful when you disturb it, it just might explode surprisingly in your face.. (i remember reading an article about this a long time ago, i just did not understand why.. but now I do!)

gosh, quantum chemistry/physics is fun!! it makes perfect sense!!

[bluedes]

interesting nga ni ask ka ani, gitudluan lang mi bag.o lang how probing microscopy works in detail (Scanning tunneling microscopy, transmission electron microscopy, atomic force microscopy, etc.....) hehehe! Atomic Force Microspy is a probing techinique which tries to measure the atomic ang molecular forces in order to obtain a map of the surface. Makakuha gyud ka ug enough details to really see the atoms. A very very simple analogy is moving your fingers lightly along a rough surface and feeling the terrain. hehehe

Nganhi they are exploiting the attractive van der waals forces in order to trap atoms so that they could move them. pero you might ask, how can this be possible when atoms are always moving? Answer? They work under really low temperatures and as much as possible in vacuum. hehehe! IBM also did this with Scanning electron microscopy.. very very remarkable.. hehehe

wow, nice post!

also, I've read more on the BECs you posted.. (Bose-Einstein condensate).. grabeh, tinuod na jud ni xa? amazing.. pag-highschool nko, kahinumdum ko I imagined a similar idea, on how to trap light photons, but never thought na possible jud.. hahaha.. duwa2x ra man to sa akong huna2x, coz nakabasa man ko ug sci-fi book that supposedly trapped light as a source of power kuno.. biliba jud nako aning einstein oi!

[simoncpu]

It depends on what you mean by "magnetized". Diamagnetism is a form of magnetism as well. I've read some research on how scientists were able to levitate water using a strong magnetic field. It was very amusing to see strawberries, tomatoes, and frogs fly! Hahaha...

[ simon.cpu ]

[fritzd]

wow, nice post!

also, I've read more on the BECs you posted.. (Bose-Einstein condensate).. grabeh, tinuod na jud ni xa? amazing.. pag-highschool nko, kahinumdum ko I imagined a similar idea, on how to trap light photons, but never thought na possible jud.. hahaha.. duwa2x ra man to sa akong huna2x, coz nakabasa man ko ug sci-fi book that supposedly trapped light as a source of power kuno.. biliba jud nako aning einstein oi!

Yep this is true.. hehehe! 3 physicists won the Nobel Prize in 2001 for its first conception in the lab. hehehe
Press Release: The 2001 Nobel Prize in Physics
Einstein is indeed amazing. He had many other contributions to physics aside from relativity. I keep encountering his name everywhere even in Laser Physics. hahaha

[fritzd]

Similar to the topic, something new!1

Attacking tumours with tiny discs - physicsworld.com

Attacking tumours with tiny discs
Researchers in the US are developing a new way of destroying cancer tumours that involves attacking them with tiny magnetic discs. Although the research is still a long way from finding medical application, it joins a growing number of innovations that are seeking to apply fundamental physics to the treatment of cancer.

[fritzd]

ah okeh...

pero nganong kani nga video: YouTube - IBM NANOTECHNOLOGY VERY COOL! Moving Individual Atoms with Tuning Forks for Memory Storage
kay makatanggal/makapamove man silag atom nga pirting lihukana man kaha sa atom? nya ang ilang animation pud kay wa galihok ang atom (absolute zero? ..impossibly).
so kung pirting lihukana sa atom, dili unta mapiont sa ilang device ang individual atom nga gusto nilang ibalhin.

interesting nga ni ask ka ani, gitudluan lang mi bag.o lang how probing microscopy works in detail (Scanning tunneling microscopy, transmission electron microscopy, atomic force microscopy, etc.....) hehehe! Atomic Force Microspy is a probing techinique which tries to measure the atomic ang molecular forces in order to obtain a map of the surface. Makakuha gyud ka ug enough details to really see the atoms. A very very simple analogy is moving your fingers lightly along a rough surface and feeling the terrain. hehehe

Nganhi they are exploiting the attractive van der waals forces in order to trap atoms so that they could move them. pero you might ask, how can this be possible when atoms are always moving? Answer? They work under really low temperatures and as much as possible in vacuum. hehehe! IBM also did this with Scanning electron microscopy.. very very remarkable.. hehehe

I made a mistake here. I just had my nanophysics exam so I was studying rigorously the past days. Scanning Tunnuling Microscopy diay ang gigamit sa IBM ani... And target atoms to be moved are weakly bound on the sample surface nya quantum tunnelling from the probe tip and induce an attractive for on the target tom that lifts it up. hehehe

[hizuka007]

ahh.. okeh. so nagamit silag technology nga mogenerate og almost absolute zero para dili molihukan ang atoms. plus kanang mga technology nga imong gipanghisgot (wa nako kasabot ^_^ ) para maremove ang mga atoms...... okeh...

technology lang gihapon ang solution... hehehhehe...

pasi nako aning kabuang nako, plan B napud ko...hehehehehe..


cge salamat sa replies fritzd (particle physicist of istorya.net).... hehehehe

[bluedes]

i found this post in a search on google.. thought it might be related..

Is it safe to microwave Styrofoam?

by Tracy » Tue Jun 14, 2005 7:00 pm

December 18, 2000

Is it safe to microwave Styrofoam? My roommate is always eating those ramen cup of noodle soups. She doesn't follow the directions and just puts the whole thing in the microwave.

Lita

Dear Lita,

Not to worry. Yes, it is safe to put Styrofoam in the microwave. The only concern would be if your roommate cooked her soup so long that the soup got so hot that it melts the Styrofoam, but it doesn't sound to me like that is happening.

When you use your microwave, you are not heating the cooking utensil like you do in conventional cooking. You are only heating the food. The microwaves actually penetrates the food, passing straight through the surrounding air and cooking utensil, which saves cooking time and electricity. The microwaves themselves are not hot, but are attracted and absorbed by water, fat and sugar in the food.

The microwaves cause the water, sugar or fat molecules in the food to rotate rapidly (at the rate of 5 billion times per second). They bump into each other, causing friction, and it is this heat which actually cooks the food. Sort of like when you rub your hands together -- feel how warm they get.

So, you see the only thing that gets hot when you cook in the microwave is the food. Sometimes the cooking utensil will get hot, but that is not from the cooking, it is from the heat generated by the food. If the food gets hot enough, it could make the utensil hot. The only utensils not safe to use in the microwave are metal and those containing lead.

Most glass and ceramic dishes are safe for the microwave, but if you have your doubts, here is a simple way to test the dish. Place a cup full of water and the dish in question in your microwave. Cook at 100% power for one minute. If the water gets hot and the dish remains cool, it is safe to use in the microwave.

If the dish is hot that means the microwaves were attracted to lead or other substance in the dish, and it is not safe to use in your microwave. Metal reflects the microwaves rather than letting them get into the dish to the food. You should also avoid cookware that has metallic trim on it. Microwave energy can become trapped in the trim and cause arching (sparks that can start a fire).

I hope this answers your question.





so how does metal reflect microwaves? i think this has some relation also why non-metallic objects cannot be magnetized...