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Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
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a spherical balloon of radius ro in relaxed state. Find the dependence of
the air pressure p inside the balloon on its radius r. Assume vacuum
Thoras C3PoY
If an elastic film can be modelled as a square grid formed by very small
springs each of stiffness k, show that the potential energy U of the film
if stretched uniformly and isotropically
can be given by
2
U = k(VS - S,). Here So is the area of unstretched film and S is the
area of the stretched film. Now such an elastic film is used to fabricate
a spherical balloon of radius ro in relaxed state. Find the dependence
the air pressure p inside the balloon on its radius r. Assume vacu
outside the balloon. A. P= 2kY
Transcribed Image Text:a spherical balloon of radius ro in relaxed state. Find the dependence of the air pressure p inside the balloon on its radius r. Assume vacuum Thoras C3PoY If an elastic film can be modelled as a square grid formed by very small springs each of stiffness k, show that the potential energy U of the film if stretched uniformly and isotropically can be given by 2 U = k(VS - S,). Here So is the area of unstretched film and S is the area of the stretched film. Now such an elastic film is used to fabricate a spherical balloon of radius ro in relaxed state. Find the dependence the air pressure p inside the balloon on its radius r. Assume vacu outside the balloon. A. P= 2kY
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