48. :
( ) āĻĒā§āĻ°āĻĨāĻ°āĻāĻ
āĨ¤
( ) ( x ) āĨ¤
x āĨ¤
( ) āĨ¤
( ) āĨ¤
(āĻ) x āĨ¤
āĻ¨ā§āĻ¨ āĨ¤
:
, A= q à n
, q = n =
(
, , W = q x n
, q =
n = x =
w = n x
, d = v t.
, v = t=
, Q(t) = Q0 Âą q t
, Q0= āĨ¤
q = āĨ¤
t= āĻ āĻ°ā§āĻŋāĻžāĻ¨ā§āĻ¤ āĨ¤
Q(t) = t ( â+â âââ
)āĨ¤
P = b r
, b =
r = āĻŦāĻā§āĻžāĻāĻą = = S%
P= = b S%
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