Acertain alarm clock ticks four times each second, with each tick representing half a period. the balance wheel consists of a thin rim with radius 0.53 cm , connected to the balance staff by thin spokes of negligible mass. the total mass of the balance wheel is 0.95 g . what is the moment of inertia of the balance wheel about its shaft? what is the torsion constant of the hairspring? express your answer using two significant figures.