A molecule of oxygen (O2) has a speed of 473 m/s at a certain temperature. Determine the speed of the molecule in kilometers per hour (km/h).

Two pans of a balance are 24.1 cm apart. the fulcrum of the balance has been shifted 1.33 cm away from the center by a dishonest shopkeeper. by what percentage is the true weight of the goods being marked up by the shopkeeper? assume the balance has negligible mass. answer in units of %.