Theses are Some Important Physics formulas
Expansion of solids;
Cast iron,type metal,lead,bismuth,silver glass,silver iodide,leather contract on heating.
Isotrophic =ex; All metals.
Anisotrophic = ex; Galena (pbs),Iceland spar.
Semiconductors = ex;Gallium,Arsenic,Germanic,silicon etc..
CO-EFFICIENT OF LINEAR EXPANSION ;[one dimensional]
FORMULAS;
L2 =L1[1+Alpha ∆t ]
L2-L1=Alpha L1 ∆t
Alpha =L1 ∆t\ ∆L
CO-EFFICIENT OF AREAL EXPANSION OR SUPERFICIAL EXPANSION;[two dimensional ]
FORMULAS;
A2 =A1[1+ ∆t ]
A2-A1=Beta A1 ∆t
Beta =A1 ∆t\∆A
CO-EFFICIENT OF VOLUMETRIC EXPANSION;[three dimensional]
FORMULAS;
V2 =v1[1+Gamma ∆t ]
V2-V1=Gamma V1 ∆t
Gamma = V1 ∆t\∆V
ISOTROPHIC BODY –UNIFORM EXPANSION IN ALL DIRECTIONS
Alpha X=AlphaY=Alpha Z=Alpha
Beta=2 alpha
Gamma=3 alpha
Ex; metals
ANISOTROPHIC BODY;
DIFFERENT EXPANSION IN DIFFERENT DIRECTIONS
# =Not equal
Alpha X # Alpha y # Alpha Z
Beta XYplane =alpha x+alpha y
Gamma = alpha x+alpha y+alpha z
Ex;Galena,Iceland spar
Germanium,silicon,gallium,arsenic.