Earth's population is about 6.5 billion. Suppose that every person on Earth participates in a process of counting identical particles at the rate of two particles per second. How many years would it take to count 6.0 x 10^23 particles? Assume that there are 365 days in a year.

Answer 1

(6.5E9*2/sec) x (60 sec/min) x (60 min/hour) x (24 hrs/day) x (365 day/yr) = particles counted in 1 year.
6.022E23/particles in 1 yr = # years.
You do the math. Something a little over a million years. That's a long time.

Answer 2

1.47 X 10E9 years

Answer 3

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