This is an example of A) alpha decay B) beta decay C) gamma decay D) half-life decay
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Heya!!
For calculate velocity, lets applicate formula
<u>Δ Being Δ</u>
d = Distance = 3790 m
t = Time = 249 s
v = Velocity = ?
⇒ Let's replace according the formula and clear "v":
⇒ Resolving
Result:
The velocity is <u>15,22 meters per second.</u>
Good Luck!!