Qualification > Sciences

physics help !!

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angell:
ok

38 is D

because since it emits 16 particles per min, from 16 - 8 - 4 is 2 half lives

now since 1 half live is 6000, 2 half lives prove its 12000 years old :D

angell:
Please post this in the physics help section

and tell my, for the motor question, which year is it from? ill see if i have the markscheme!

esso:
its from may 1995...can any one find the markscheme?????

astarmathsandphysics:
here

esso:
Thanks astar....

but why is 35 D ???????

need an answer please...

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