Find the moment of inertia of the hydrogen molecule about an axis passing through its centre of mass and perpendicular to the inter-nuclear axis. Given: mass of the hydrogen atom =1.7×10−27 kg, inter-atomic distance =4×10−10m.
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Solution
Mass of hydrogen atom=1.7×10−27kg
Total mass of two molecules =2×1.7×10−27kg
distance between the two atoms =4×10−10m
distance from the axis of rotation =4×10−10m2=2×10−10m