6. A tennis ball,0.314kg, is accelerated at a rate of 160 m/s2 when hit by a professional tennis player. What force does the player's tennis racket exert
on the ball?

Which sound characteristic is not affected by the relative motion of an object

Aboat radioed a distress call to a coast guard station. at the time of the call, a vector a from the station to the boat had a magnitude of 45.0 km and was directed 15.0° east of north. a vector from the station to the point where the boat was later found is = 30.0 km, 15.0° north of east. what are the components of the vector from the point where the distress call was made to point where the boat was found? in other words, what are the components of vector c = b - a?

What is the difference between mass density and weight density?