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?
if the half life of protactinium 234 is 6.75 hours, a sample container 50g will have what after 3days,
in a three
days period we have 72 hours, therefore in a 72 hour period we have 72/6.75
half lives which is 10 half life , after ten half life only 0.1 % of the
original sample will remain.
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