Sando
Knife Maker
- Joined
- Jul 4, 2002
- Messages
- 1,148
Mildly related:
A friend is an MRI service man. Very interesting machine. In short is uses an extremely powerful magnet. In fact so strong that it makes the polarity of the hydrogen in the water molecules line up.
As a way of explaining the scale, the magnetic pull of the entire earth is .5 tesla. A single MRI machine runs at 2. That puts the body in immediate proximity to 4 times the magnetic pull of the earth. At that concentrated level there is an effect on individual hydrogen atoms. (Don't know about other elements, such as Iron.)
As a funny story:
The magnetic field is, obviously, very strong. The larger the metal object and the closer, the more pull. The tech I know was working the hospital one night while workers were delivering stuff into the room. He warned them not to bring the dolly in. "Don't go past this line! Just hand carry the boxes," he kept repeating. He had to take a leak and thought the workers got the point, so he left.
Well they didn't. They took the dolly past the line. It flew across the room. When he returned he found the guys vainly trying to pull the dolly off the side of the multi-million dollar machine.
He attached a rope and 5 or 6 guys went out in the hallway to drag the flying dolly free from the grip of the giant machine.
--------------------------------------------------
Directly related:
It would be interesting to quench in an MRI machine. However, you'd never get the steel off the wall and into the tank.
Steve
A friend is an MRI service man. Very interesting machine. In short is uses an extremely powerful magnet. In fact so strong that it makes the polarity of the hydrogen in the water molecules line up.
As a way of explaining the scale, the magnetic pull of the entire earth is .5 tesla. A single MRI machine runs at 2. That puts the body in immediate proximity to 4 times the magnetic pull of the earth. At that concentrated level there is an effect on individual hydrogen atoms. (Don't know about other elements, such as Iron.)
As a funny story:
The magnetic field is, obviously, very strong. The larger the metal object and the closer, the more pull. The tech I know was working the hospital one night while workers were delivering stuff into the room. He warned them not to bring the dolly in. "Don't go past this line! Just hand carry the boxes," he kept repeating. He had to take a leak and thought the workers got the point, so he left.
Well they didn't. They took the dolly past the line. It flew across the room. When he returned he found the guys vainly trying to pull the dolly off the side of the multi-million dollar machine.
He attached a rope and 5 or 6 guys went out in the hallway to drag the flying dolly free from the grip of the giant machine.
--------------------------------------------------
Directly related:
It would be interesting to quench in an MRI machine. However, you'd never get the steel off the wall and into the tank.
Steve
). 
)
