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dimulka [17.4K]
3 years ago
9

Which body system is this? Your brain and nerves receive and send

Chemistry
1 answer:
KiRa [710]3 years ago
8 0

Answer: its the nervous system

Explanation:

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Find the natural abundance of Si-30.
nataly862011 [7]
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A nuclear waste site. cesium-137 is a particularly dangerous by-product of nuclear reactors. it has a half-life of 30 years. it
hram777 [196]
The mass decay rate is of the form
m(t) = m_{0} e^{-kt}
where
m₀ = 3000 g,the initial mass
k = the decay constant
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Because the half-life is 30 years, therefore
e^{-30k} =  \frac{1}{2} \\\ -30k = ln(0.5) \\ k =  \frac{ln(0.5)}{-30} =0.0231

After 60 years, the mass remaining is
m = 3000 e^{-0.0231*60} = 750 \, g

Answer: 750 g

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