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← ScienceWhich consequence results when rapid vaporization in a cryogenic dewar occurs?
A)Increased internal dewar pressure✓
B)Decreased helium gas cooling rate
C)Reduced insulation vacuum integrity
D)Elevated liquid nitrogen viscosity
💡 Explanation
Increased dewar pressure results because the heat of vaporization warms the cryogenic liquid enhancing boiling, causing a higher rate of phase change rather than maintaining a stable temperature; therefore, internal pressure increases rather than any insulation or fluid property deteriorating.
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