BackFind the center of mass of the ammonia molecule. The chemical formula is NH₃. The hydrogens are at the corners of an equilateral triangle (with sides 0.16 nm) that forms the base of a pyramid, with nitrogen at the apex (0.037 nm vertically above the plane of the triangle).
A huge balloon and its gondola, of mass M, are in the air and stationary with respect to the ground. A passenger, of mass m, then climbs out and slides down a rope with speed v, measured with respect to the balloon. With what speed and direction (relative to Earth) does the balloon then move? What happens if the passenger stops?
(II) A 52-kg woman and a 72-kg man stand 8.6 m apart on nearly frictionless ice. How far from the woman is their cm?