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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he half life of cobalt 60 is 5.20 yr how many milligrams of a 2.000 mg sample remains after 6.55 years
after 6.55 years only one half life has elapse,
therefore what remains is 1.00mg of cobalt -60
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