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math/science

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1) Nobelium has a half-life of 1 hour. If you start with 1 kg, how much will you have by this time tomorrow?

2) You have 90 g of Lawrencium. You step away to watch one episode of "everybody loves raymond." when you return to your scientific studies, you only have 0.088g of lawrencium. what is its half-life?

  • math/science - ,

    1) 1 kg * (1/2)^24

    2. .088/90 = (1/2)^(t/T)

    t is the length of an episode of that programm (30 minutes?). T is the half life of the isotope. Solve for T

  • math/science - ,

    is the second one 10 minutes?

  • math/science - ,

    i don't understand the first ine still. I got 6 but that does not make any sense at all

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