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diff --git a/_Engineering_Thermodynamics/screenshots/Screenshot_(49).png b/_Engineering_Thermodynamics/screenshots/Screenshot_(49).png
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diff --git a/_Engineering_Thermodynamics/screenshots/Screenshot_(50).png b/_Engineering_Thermodynamics/screenshots/Screenshot_(50).png
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diff --git a/_Engineering_Thermodynamics/screenshots/Screenshot_(51).png b/_Engineering_Thermodynamics/screenshots/Screenshot_(51).png
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