Two sound sources send identical waves of 20 cm wavelength out along the +x axis. At what minimum (non-zero) separation of the sources will a listener on the axis beyond them hear: (a) the loudest sound (b) the weakest sound?

Abicycle slows down when the rider applies the brakes. what type of energy transformation is involved in this example? a. kinetic energy into heat energy b. heat energy into potential energy c. potential energy into kinetic energy d. kinetic energy into mechanical energy

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Friction removes energy from objects in motion. which statement best describes how this works? a) friction transforms ke into thermal energy b) friction transfers thermal energy to ke c) friction transforms te into pe d) friction transforms pe into ke e) friction transfers ke into pe