Basic principle for scientific research is that the experiment must be able to be replicated. What happens when an experiment is replicated

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

The free body diagram shows a box being pulled to the left up a 25-degree incline. the magnitude of the normal force is

In positive numbers less than 1, the zeros between the decimal point and a non-zero number are blank significant