a) dV=tdA
b) dV=dA
c) f=[fx,fy]T
d) Trussky program
Answer: a
Explanation: In mathematics, a volume element provides a means for integrating a function with respect to volume in various co-ordinate systems such as spherical co-ordinates and cylindrical co-ordinates. Then elemental volume is given by
dV=tdA.
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