In Joe's work in radiochemotherapy, he uses iodine-131 (half-life 8.0 days) in the treatment
of thyroid conditions. If his...?
In Joe's work in radiochemotherapy, he uses iodine-131 (half-life 8.0 days) in the
treatment of thyroid conditions. If his sample for treatment has to maintain an activity of
4.85 x 10^16 decays per second, how much time does he have until he must resupply a
sample that begins with 30.0g?

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?