Tag: physics

The Curie temperature is the temperature above which ferromagnetic materials lose their permanent magnetic field, the magnetism completely disappears. Above Curie temperature, the material behaves para-magnetically.

Diamagnetic           Paramagnetic             Ferromagnetic
-1 $\leq$ $\chi$ < 0                  0 < $\chi$ < $\varepsilon$                  $\chi$ >> 1
0 $\leq$ $\mu _{r}$ < 1                1 < $\mu _{r}$ < 1+ $\varepsilon$               $\mu _{r}$ >> 1
$\chi$ $=$ magnetic susceptibility
$\mu _{r}$ $=$ relative permeability.
$\varepsilon$ < 1 and small.

diamagnetic material
$-1\leq \chi < 0$
0 $\leq$ $\mu$ < 1
$\chi$ $=$ Magnetic susceptibility
$\mu$ $=$ permeability

Diamagnetic sultance
-1 $\leq$ $\chi < 0$ 
$\theta =\mu < 1$
$\chi =susceptibility$

If pitch is high frequency is high and vice versa.

Our inner ear is shaped like a snail and is called cochlea.

Combination of notes that produced jarring effect on the ear is called discord. Discord is lack of harmony between notes sounding together.