Una sorgente sonora ferma rispetto all'aria vibra alla frequenza di 1100 Hz. Un rilevatore di suoni che si sta avvicinando alla sorgente registra una frequenza di 1200 Hz. Calcola la velocità del rilevatore.

Consider a small frictionless puck perched at the top of a fixed sphere of radius r. if the puck is given a tiny nudge so that it begins to slide down, through what vertical height will it descend before it leaves the surface of the sphere? [hint: use conservation of energy to find the puck's speed as a func e conservation of energy to find the puck's speed as a function of its height at what value of this normal force does the puck leave the sphere? ] here on the puck.