Q. Two masses m1 and m2 are connected by light cables to the perimeters of two cylinders of radii r1 and r2, respectively. The cylinders are rigidly linked to each other but are free to rotate without friction on a common axle. The moment of inertia of the pair of cylinders is I = 45 kgm2 Also r1 = 0.5 meter, r2 = 1.5 meters, and m1 = 20 kilograms.
Q. A violinist places her finger so that the vibrating section of a 1 g/m string has a length of 40.00 cm, after that she draws her bow across it. A listener nearby in a 20 ^circ {rm C} room hears a note with a wavelength of 30 cm.