The table below compares the radioactive decay rates of two materials.
Material Original mass of material (in grams) Mass of material after 60 hours (in grams)
1 208 13
2 200 50
Based on the table, which of these conclusions is most likely correct?
The half-life of Material 1 and Material 2 are equal.
The half-life of Material 2 is double the half-life of Material 1.
The half-life of Material 2 is 30 hours more than the half-life of Material 1.
The half-life of Material 1 is 30 hours more than the half-life of Material 2.
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OK. So far i've got that the Half life of Mat. 1 Decays every 15 hours Because it decayed Four times. Mat. 2 decays every 30 Since it decayed twice...
So it'd be from what im guessing B: Mat. 2's Half Life is Double Mat. 1s
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Australia is in the Southern hemisphere. Which of these statements is correct about Australia?
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