Answer:
The atoms that contain an unstable combination of neutrons and protons, or excess energy in their nucleus
Answer:
12 mins
Explanation:
The distance covered is 5 km, divide this by 25 to get the fraction of an hour it takes. Doing this you get .2, times this by 60 min (1 hour) to get how many mins it takes
F = ma
a = f/m
if f doubled , acc. will be doubled
