2. #la* He 1 then angle between and will be z C) 60° a. 30° b) 45°​

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

Acompound machine is also called a machine. a. force b. simple c. complex d. directional

Often called simply "velocity," this is the velocity of an object at a particular moment in time.