If y(x, t) = (5.2 mm) sin[kx + (450 rad/s)t + φ] describes a wave traveling along a string, how much time does any given point on the string take to move between displacements y = +3.4 mm and y = -3.4 mm?

Which statement best describes how private industry decides where to spend the money on research and development

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

Jaylen is a championship runner of the school's track team. during one of his trials, his speed was measured at 15.1 m/s. find jaylen's kinetic energy during that trial if his mass is 54.6 kg.