Question

How many times longer than the duration of a nerve impulse is the age of the Earth? (Use this table of magnitudes to calculate your answer.)

Approximate values of time (in seconds) 23 10 Time for light to cross a proton 10 22 Mean life of an extremely unstable nucleus 1015 Time for one oscillation of visible light 10 13 Time for one vibration of an atom in a solid 108 Time for one oscillation of an FM radio wave 10-3 105 107 1011 Duration of a nerve impulse One day One year Recorded history Age of the Earth Age of the universe 1017 1018

Answer 1

$\frac{Age of earth}{duration of nerve impulse}=10^{20}$