Q. A hydrogen molecule consists of two hydrogen atoms whose total mass is 5.3 x 10-26 kg and whose moment of inertia about an axis perpendicular to the line joining the two atoms, midway between them, is about 1.90 multiplied by 10-46 kg·m2. Estimate, from these data, the effective distance between the atoms.
Q. A light plane is headed due south with a speed of 158 km/h relative to still air. After 1.07 hour, the pilot notices that they have covered only 125 km and their direction is not south but southeast (45.0^circ).