Which of the following equations illustrates the law of conservation of matter?
A. 4A1 + 302 → 2A1203
B. 4A1 + O2 → 2A1203
C. 2A1 + 02 → A1203
D. 2A1 + 302 → Al2O3

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?