Homework Help: math/science

Posted by kayla on Thursday, November 13, 2008 at 7:32pm.

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 - drwls, Thursday, November 13, 2008 at 8:15pm
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 - kayla, Thursday, November 13, 2008 at 8:28pm
is the second one 10 minutes?
math/science - kayla, Thursday, November 13, 2008 at 8:30pm
i dont understand the first ine still. I got 6 but that does not make any sense at all

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