What is the acceleration of a ball rolling 12 m/s to a stop in 3 seconds A. -4 m/s^2
B. -0.25 m/s^2
C. 0.25 m/s^2
D. 4 m/s^2

During takeoff, the sound intensity level of a jet engine is 170db at a distance of 34 m. what's the sound intensity level at a distance of 1.0 km?

The plum pudding model of the atom states that ?

A0.580-kg rock is tied to the end of a string and is swung in a circle with a radius of 0.500 meters. the velocity of the rock is 4.50 m/s. what is the centripetal force acting on the rock? 15.5 n 5.22 n 69.8 n 23.5 n