Atrain leaves the station heading south on the tracks. it takes the train 5 seconds to reach 50 miles per hour. it completes the entire 100 mile trip in two hours. calculate the train's average speed and velocity over the two hour trip. show your work. identify if each of the measurements are a scalar or vector quantity.

the second one and the forth one are in the purple because they are opinions and the rest are in the yellow

explanation:

harry byrd declared organized resistance by southern states would prevent racial integration.

it's when something is going so fast it makes a loud noise, breaking the sound barrier, for example: a jet makes a loud noise, not only cause of the jet but because they reached a point where they went so fast that you can year the noise from various parts, kinda like a police car, lets say the car was going   so fast that you hear the siren of the cop car right next to you, but the car is probably a mile a way, it's cos the siren was next to you a few seconds if you understand me