What are two ways in which ultrasound technology produces images? A. By absorption of sound waves in the body
B. By using sound in frequencies that reflect off body tissue
C. By measuring the time it takes for reflected sound waves to be detected
D. By determining the frequencies of sound waves

Suppose that a mass of 2 kg is attached a spring whose spring constant is 50. the system is damped such that b = 12 . the mass is set in motion with an initial velocity of -8 m/s at a position 0 meters from equilibrium. set up and solve a differential equation that models this motion. write your solution in the form a cos ( ω t − α ) where α is a positive number. use your solution to fill in the information below: what is the amplitude of the motion? what is the value of ω ? what is the phase shift?