Amtrak
Intercity rail operator in the United States
Can Amtrak's Acela Express break the sound barrier?
Amtrak's Acela Express is the fastest train in the Western Hemisphere and can reach 150 mph. A US Navy plane would need to travel 770 mph to break the sound barrier.
What is the maximum speed of Amtrak's Acela Express? What is the minimum speed needed to break the sound barrier? Is #1 greater than or equal to #2?