Transcript Document 7587354

Absolute dating (chronometric or calendar dating )
-process of determining a specific date for
an archaeological site or artifact
Radiometric dating - technique used to
date materials based on knowledge of the
decay rates of naturally occurring isotopes,
and the current abundances.
The half-life of a quantity subject to
exponential decay is the time required for
the quantity to decay to half of its initial
value.
Let N(t) be the amount of an
element left (after decay) at time t.
t
N(t)
0
N0
1
N0*(1/2)
2
N0*(1/2)2
3
N0*(1/2)3
4
N0*(1/2)4
We calculated the amount of a quantity N(t)
left after any period of time t to be
N(t) = N0 (1/2) t
where N0 is the initial amount of the
quantity.
N(t) = N0 (1/2) t
N(t) = N0 (1/2) t
What happens to the
the quantity
decays
amount of the quantity as t
exponentially
as
t
gets
larger
gets larger and larger?
and larger
How does an exponential function
compare with a linear function?
2x
Do they grow at similar rates?
Which grows faster?
2x
2*x
2*x
More on
Prime Numbers
• GIMPS http://www.mersenne.org/
• TIERAZON V29 - Win32 fractal program written
by Stephen C. Ferguson
http://home.houston.rr.com/fergusonsc/Tierazon-v29/
mR. bAcZkOwSkI
What is your favorite class?
We love science class!!!!!!!!!!!!
Mr. Baczkowski’s web page:
www.math.sc.edu/~baz