Page 32 - 10-21-2019 Final English Edition, the Book with Ch. 46 Added by James H Hong. (1)
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1. Fuel cells involve combustion and electrochemistry, so
wasting and no charging can be a problem.
2. Large-scale production of OLEDs requires the film to be
changed to a thick film.
6.20 Acceleration / Time
Acceleration/time is a new vocabulary that can be applied to
v(t)= ct ^ 3
V(t) is the speed t = time = time
Ex,1：v（t）= ct ^ 2 v（t）/ t = 2ct ;;Ex.2：v（t）= ct ^ 3，v
（t）/ t = 3ct ^ 2 v（t）/ t ^ 2 = 6ct t =time v（t）=velocity
6.21 E in the tensile test formula
F = strength A = cross section area dL = length extension L =
original length
F/A = E dL/L
F/(dL/L) = E
The larger dL/L is, the smaller E is.
What Represents E is stiffness Stiffness. Not Elasticity or
ductility.
6.22 physical formula
Each physical science formula only considers or includes
discovered factors and does not include factors that have not yet
been discovered.
