What does planck's theory state?
a. light has only wave properties
b. light has a dual nature. it has properties of both waves and particles
c. energy radiated by a body is in the form of packets called quanta
d. the energy of an emitted photon depends on the speed of light

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?