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2. Refrigerator magnet - Wikipedia

   en.wikipedia.org/wiki/Refrigerator_magnet

   A collection of refrigerator magnets A refrigerator magnet displaying a sexual assault hotline's telephone number. A refrigerator magnet or fridge magnet is a small magnet, often attached to an artistic or whimsical ornament, which may be used to post items such as shopping lists, Christmas cards, child art or reminders on a refrigerator door, or which simply serves as decoration.

3. Magic Slate - Wikipedia

   en.wikipedia.org/wiki/Magic_Slate

   Sigmund Freud described such Wunderblock, comparing it to "the structure of the perceptive apparatus of the mind" in his 1924 "Note on the Mystic Writing-Pad" (later mentioned by Jacques Derrida in Writing and Difference). [6] [7] [8] The devices of this kind were also known as Iki-piirto in Finland, Printator in Great Britain, [7] Super Slate. [9]

4. Magnetoreception - Wikipedia

   en.wikipedia.org/wiki/Magnetoreception

   In animals, the mechanism for magnetoreception is still under investigation. Two main hypotheses are currently being discussed: one proposing a quantum compass based on a radical pair mechanism, [2] the other postulating a more conventional iron-based magnetic compass with magnetite particles.

5. Magnetic susceptibility - Wikipedia

   en.wikipedia.org/wiki/Magnetic_susceptibility

   In electromagnetism, the magnetic susceptibility (from Latin susceptibilis 'receptive'; denoted χ, chi) is a measure of how much a material will become magnetized in an applied magnetic field. It is the ratio of magnetization M ( magnetic moment per unit volume ) to the applied magnetic field intensity H .

6. Magna Doodle - Wikipedia

   en.wikipedia.org/wiki/Magna_Doodle

   A Magna Doodle drawing board. Magna Doodle is a magnetic drawing toy, consisting of a drawing board, a magnetic stylus, and a few magnet shapes.Invented in 1974 by Pilot Corporation, [1] over forty million units have been sold to date worldwide, under several brands, product names and variations, including Tyco and Mattel/Fisher Price.

7. Orders of magnitude (magnetic field) - Wikipedia

   en.wikipedia.org/wiki/Orders_of_magnitude...

   Magnetic induction B (also known as magnetic flux density) has the SI unit tesla [T or Wb/m 2]. [1] One tesla is equal to 10 4 gauss. Magnetic field drops off as the inverse cube of the distance (⁠ 1 / distance 3 ⁠) from a dipole source. Energy required to produce laboratory magnetic fields increases with the square of magnetic field. [2]