Kinetic energy is 1/2m*v^2
They already halved the mass for you and they already squared the velocity for you. I’m unsure why you’re even asking this question. It’s simple multiplication at this point.
(27.5kg)*(4m^2/s^2) = 110 Jules
I think letter b were you put the letters so
Answer:
B
Explanation:
The time it takes for half of the radioactive atoms to decay to a stable state.
Hope this helped!
