Physics, 24.09.2019 22:40 dalilaoliva12
Write a hypothesis about how the number of half-lives affects the number of radioactive atoms. use the "if . . then . . because . ." format and be sure to answer the lesson question: "how does the number of radioactive atoms change over time? "
answer- if the number of half-lives increases, then the number of radioactive atoms decreases, because approximately half of the atoms' nuclei decay with each half-life.
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Suppose that 27 j of work is needed to stretch a spring from its natural length of 6 m to a length of 9 m. (a) how much work is needed to stretch the spring from 12 m to 14 m? j (b) how far beyond its natural length will a force of 78 n keep the spring stretched?
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Write a hypothesis about how the number of half-lives affects the number of radioactive atoms. use t...
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