(3) 3.82 days and alpha decay is your answer.
Well physical would be if you have Clay and you molded into a new shape or if you put butter on your toes and it melts or water evaporating from the surface of the ocean chemical changes would be milk going sour jewellery tarnishing which means turning into a different color or rust bread putting it in the oven and turning it into toes or rust forming on the nail that is left outside
Answer:
If a disk rolls smoothly across a floor, what is the velocity of the point that is in contact with the floor? ... Twice the velocity of the center of the disk. Which gives the kinetic energy of an object rolling smoothly over a floor? The sum of the translational kinetic energy and the rotational kinetic energy.
Explanation: