In the figure above, what do the arrows that run from B to C represent? ultrasonic sound waves reflected back to the ship

signals sent by radio waves from the ship

ultrasonic sound waves sent out from the ship

signals sent by radio waves back to the ship​

Bone-strengthening physical activity done increases bone-mineral content and bone density in youth.

Ahowler monkey is the loudest land animal and, under some circumstances, can be heard up to a distance of 4.6 km. assume the acoustic output of a howler to be uniform in all directions and that the threshold of hearing is 1.0 × 10-12 w/m2. what is the acoustic power emitted by the howler

Which statement correctly describes the relationship between frequency and wavelength?