The speed of sound in air is 340 m/s. what is the speed of a supersonic plane that travels at twice the speed of sound? give your answer in kilometers per hour and miles per hour.

2.45 * 10³ km/h

1.52 * 10³ mi/h

Explanation:

The speed of sound in air is 340 m/s. If the speed of a supersonic plane is twice the speed of sound, its speed is 2 * 340 m/s = 680 m/s

1 hour is equal to 3,600 s. The speed expressed in m/h is:

680 m/s * (3,600 s / 1 h) = 2.45 * 10⁶ m/h

1 kilometer is equal to 1,000 meters. The speed expressed in km/h is:

2.45 * 10⁶ m/h * (1 km / 1,000 m) = 2.45 * 10³ km/h

1 mile is equal to 1.609 kilometers. the speed expressed in mi/h is:

2.45 * 10³ km/h * (1 mi / 1.609 km) = 1.52 * 10³ mi/h