Explanation:
radio waves, which include visible light waves.
Answer:

Explanation:
From the question we are told that
Radius of vertical r= 8m
Force exerted by passengers is 1/4 of weight
Generally the net force acting on top of the roller coaster is give to be

where


Generally the net force is given to be 




Mathematical we can now derive V




Therefore the speed of the roller coaster is given ton be 
X Represents the distance the spring is stretched or compressed away from its equilibrium or rest position.
The study of sound is called sonics and the study of sound waves are acoustics