hhopke
  • hhopke
What is the half-life of this radioactive substance? Count rate graph attached.
Physics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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hhopke
  • hhopke
anonymous
  • anonymous
Half life is when the starting or initial value goes down to half its amount. At t=0s, the count per minute is 240.
hhopke
  • hhopke
So the half-life is the time taken for the count rate to be 120? @Shalante

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anonymous
  • anonymous
Yes 240/2=120 Now figure the day period that the counting per minute is 120. It can in decimals or fraction.
hhopke
  • hhopke
Okay. Thank you so much!
anonymous
  • anonymous
No problem!
jmansedg
  • jmansedg
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
hhopke
  • hhopke
Probably geoform, but I haven't taken that class yet.
anonymous
  • anonymous
Crystals in a mineral are in layers after layers.
jmansedg
  • jmansedg
thank you

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