B because alpha radiation is just the amount of alpha particles, c could also be plausible but i think gamma rays are more deadly
So as a fact we do not know if the boat "burned tires" to reach the buoy :) the average velocity is +1,11 m/s. 20m divided by 18 seconds is +1.11 m/s
Answer:
it is long.
Explanation:
I know the answer but I don't know how to explain it
Gravity is a force acting on a object
