[填空题]
A “seconds” pendulum has a period of exactly 2.000 s — each one-way s 2ig( 9v tv+yhi*yv(gew6v;7e n 9bqje/fl.exling takes 1.0 ljxf; eve .be7l6n/q900 s.
(a) What is the length of a seconds pendulum in Austin, Texas, where $g=9.793\mathrm{m/s}^{2}$ m
(b) If the pendulum is moved to Paris, where $g=9.809\mathrm{m/s}^{2}$ by how many millimeters must we lengthen the pendulum? mm
(c) What would be the length of a seconds pendulum on the Moon, where $g=1.62\mathrm{m/s}^{2}$ m