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hhopke

  • one year ago

What is the half-life of this radioactive substance? Count rate graph attached.

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  1. hhopke
    • one year ago
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  2. anonymous
    • one year ago
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    Half life is when the starting or initial value goes down to half its amount. At t=0s, the count per minute is 240.

  3. hhopke
    • one year ago
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    So the half-life is the time taken for the count rate to be 120? @Shalante

  4. anonymous
    • one year ago
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    Yes 240/2=120 Now figure the day period that the counting per minute is 120. It can in decimals or fraction.

  5. hhopke
    • one year ago
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    Okay. Thank you so much!

  6. anonymous
    • one year ago
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    No problem!

  7. jmansedg
    • one year ago
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    shal can you help me it wont let me post so here you go The shape a mineral forms when slowly solidifying one layer of molecules at a time is called A. hardness B. luster C. crystal form D. geoform

  8. hhopke
    • one year ago
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    Probably geoform, but I haven't taken that class yet.

  9. anonymous
    • one year ago
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    Crystals in a mineral are in layers after layers.

  10. jmansedg
    • one year ago
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    thank you

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