Answer:
Ionosphere
Explanation:
The thermosphere reaches 600 kilometres just above mesosphere and begins immediately above the mesosphere. This layer is where the aurora and satellites appear.
The ionosphere is the comprehensive career of the mesosphere because most of the thermosphere, located 80–400 kilometres just above ground atmosphere.
Auroras — magnificent flowing streaks of light seen in the night sky – appear in this location.
90km/4hrs=22.5kn/hr average speed. Her dispacement is 0. Her trip started and ended in the same place.
Answer:
I know 1, that is in the case of a burning of a candle.
Explanation: