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?
Amtrak
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.
Intercity rail operator in the United States
Can Amtrak's Acela Express break the sound barrier?