Radioactive decay occurs when an unstable nucleus loses energy
So the answer is the second choice
Answer:
it is true because there is west,south and etc
The acceleration is defined as the ratio between the change in speed and the change in time (i.e. the time elapsed to perform the speed change).
In this case, the reference to the "starting block" hints that the initial speed is 0, and the final speed is 8 m/s. This means that the change in speed is 8-0=8 m/s.
We are given that this change in speed takes place in 4 seconds.
So, the acceleration is the ratio between the change in speed and the time elapsed: 8/4=2m/s^2