Awindmill is turning at 12.5 rad/s in a clockwise direction. the wind suddenly shifts, producing an angular acceleration of 0.75 rad/s2 in a counterclockwise direction. after 12.0 s, how many revolutions has the windmill blades turned?

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

Calculate the mass of an object that has a momentum of 100kg x m/sec and velocity of 4 m/sec

Light traveling in water, nwater = 1.33, strikes a plastic block at an angle of incidence of 51.4°; part of the beam is reflected and part is refracted. if the index of refraction of the plastic is 2.0, what is the angle made by the reflected and refracted beams?