Why did the transcontinental railroad lead to the end of pioneer era because.

Explanation:

It made commerce possible on a vast scale.

In addition to transporting western food crops and raw materials to East Coast markets and manufactured goods from East Coast cities to the West Coast, the railroad also facilitated international trade. ... Building of the Transcontinental Railroad, circa 1869.

e

explanation:

there is no change in the electric potential energy as it is in rest on both conditions.

when jerome paddle in flowing river towards east the net speed of jerome will increase

so the net speed of jerome will be given as

now the speed of paul will be same as it is given as he is running on the ground

so

so here we can say since the speed of jerome is more so he will win the race

now as we know the distance so the time difference is given as

so jerome will reach first and the time difference will be 203.55 s or 3.4 min