Determine the momentum of a 60-kg halfback moving eastward at 9 m/s

Ajet plane has a sound level of 120 db at a distance of 60 m. what is the q23. sound level at a distance of 6.0 km? (60)2 (6000)? om solution 80db db, hint: 16x assume ultrasound waves travel through the body of an animal at 1540 q24. m/s. if a 30,000 hz signal were reflected off a portion of a heart which was moving toward the source at 3 m/s, what frequency signal would return to the stationary source? solution 30.117hz

What are two different ways you could find the value of a? explain these methods.

For waves in the ocean, the medium of the waves is a. air b. water c. energy d. a passing boat