what do you think you know about physics, physics is the study of matter under the effect of energy, but does this includes solid states bodies, atoms at ground states, object at microscopic size or object moving faster than light? these and more is what prompt me to ask again what is physics?
▼
sodium-24 has a half-life of 15 hours. how much of a 20 mg sample would remain after two half-lives?
after
two half lives only 25% of the original mass will remain , their after the
30hrs only5mg of sodium-24 will remain.
No comments:
Post a Comment