In the figure below, a tube with a modulus of elasticity of 1 MPa is anchored between two stationary ports and injected with a volume of water. The wall thickness of the tube is 1 cm. If the original pressure is 100 kPa. If The new radius Rnew when the pressure increases by 100% and R is the original Radius at 100 Kpa, Then (R/Rnew)²=

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