Question

7. [lpt] In a simple approximation, a diatomic molecule (e.g., H2) can be represented by two equal masses, m, on a frictionless surface, connected by a spring of constant k. Consider the oscillations of the masses and the connecting spring. Select true or false for each of the statements; e.g., if the first statement is true and the second false, enter TF You only have 1 try! i. During the oscillation of this mass-spring system, its centre of mass will move with constant or zero velocity. ii. The laws of physics are the same in any inertial reference frame. Answer: Submit All Answers 8. [lpt] Once one realizes that the centre of the two-mass-spring system can be clamped without altering the natural frequency, it is easy to show that the natural frequency is the same as that of the system shown here. 2k Make sure you understand why this is the case! Gerhard Herzberg, one of Canada's Nobel prize winners, is famous for measuring the vibrational frequencies of various molecules. The atomic mass of hydrogen is 1.67x10 27 kg, and the frequency, 1.32x1014 Hz. What is the effective force constant that connects the two atoms?

Answer 1