费曼教艺术家电磁学教不下去

送交者: 短江学者于 2016-02-24, 16:32:33:

”When I tried to show him how an electromagnet works by making a little coil of wire and hanging a nail on a piece of string, I put the voltage on, the nail swung into the coil, and Jerry said, “Ooh! It’s just like fucking!”

所有跟贴:

but frictionless - cornbug (12 bytes) 2016-02-24, 17:38:12 (801902)
- you don't know what friction is - else (117 bytes) 2016-02-25, 01:48:48 (801920)
  - friction is something which can be reduced by adding vaseline (无内容) - pgss (0 bytes) 2016-02-25, 02:04:33 (801925)
    - 艺术家的直觉比cornbug的理性准确 (无内容) - else (0 bytes) 2016-02-25, 02:14:24 (801926)
  - This one is clearer to demonstrate the friction - else (117 bytes) 2016-02-25, 01:54:38 (801921)
    - nice demo (无内容) - pgss (0 bytes) 2016-02-25, 02:04:00 (801924)

加跟贴