If 4 w/cm2 of ultrasound power is incident on the fat-bone interface, how much of the power is reflected back to the transducer?

Which statement correctly describes the relationship between frequency and wavelength?

Atelevision set that has been running for a while heats up even the air around it. which two laws of thermodynamics could be used to analyze this scenario

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