Answer:
(A) [tex]1.268\times 10^{-9}m[/tex]
(B) [tex]40km/million\ year[/tex]
Explanation:
We have given speed is 4 cm/year
We know that 1 m = 100 cm
And 1 year = [tex]3.154\times 10^7sec[/tex]
So speed in [tex]4cm/year=4\times \frac{0.01m}{3.154\times 10^7sec}=1.268\times 10^{-9}m/sec[/tex]
(A) Time is given t =1 sec
We have to find the distance
Distance is equal to , distance = speed × time = [tex]=1.268\times 10^{-9}\times 1=1.268\times 10^{-9}m[/tex]
(B) Now we have to find the speed in km/million year
As 1 km = 1000 m
And 1 m = 100 cm
So 1 km = 100000 m
[tex]1million\ year=10^6year[/tex]
So speed in km/million year will be
[tex]4cm/year=4\times \frac{10^{-5}km}{10^{-6}million\ year}=40km/million\ year[/tex]
