Usually for me a silence is awkward when there is nothing else to do but talk, like when walking somewhere or sitting in a bench. That moment when the topics stop flowing. The less people, the longer it usually lasts
With those speeds it must be impossible to add curves to the track. With some back of the napkin calculations, a force of 1g can be felt with a turn radius of 1.7 km. And a track with multiple stops doesn't let the train go as fast. It may be delegated to a straight shot from one side of the country to the other with a stop in the middle
That's pretty cool until CIA or another government intelligence kidnaps you to keep you inside a box converting everything you touch into poop, giving them an advantage against other countries
Poop at ballistic speeds can still kill you, I guess if the power has unlimited range you are safe by turning the guns into poop before they shoot.
If the power works by contact as is usually the case, you would need a team to rob the bank, it would be the same as having a very fast drill to break the vault.
How do you imagine space exploration would be?
"Now you can also help discover space
by working as a minimum wage welder in the bottom of this ship"
The bankers will just have a per solar system stock market the way we are heading