Final answer:
The length of the water pipe is 2 x 10^9 times larger than the diameter of the ball bearing.
Step-by-step explanation:
To find the number of times larger the length of the water pipe is compared to the diameter of the ball bearing, we need to divide the length of the water pipe by the diameter of the ball bearing.
Given that the length of the water pipe is 8 x 10^6 meters and the diameter of the ball bearing is 4 x 10^-3 meters,
we can calculate:
Length of water pipe / Diameter of ball bearing = (8 x 10^6) / (4 x 10^-3)
= (8 x 10^6) x (1 / (4 x 10^-3))
= (8 x 10^6) x (250) = 2 x 10^9.
Therefore, the length of the water pipe is 2 x 10^9 times larger than the diameter of the ball bearing.