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?
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calculate the percent activity of the radioactive isotope rhenium-186 remaining after 2 half-lives
after two half livesthe
remainingis
after the 1st half life we 50% will remain
after the second half life 25% of
the original sample will remain
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