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

the current is 0.6

voltage ÷ resistance = current

so 12 ÷ 20 = 0.6

the answer should be in the picture.