Aball is thrown vertically upward with a speed of 27.9 m/s from a height of 2.0 m. how long does it take to reach its highest point? the acceleration of gravity is 9.81 m/s 2 . answer in units of how long does the ball take to hit the ground after it reaches its highest point? answer in units of 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

Idon’t quite understand this problem

An object's buoyant force and weight mean the same thing.a. trueb. false