An artificial satellite orbits Earth at a speed of 7800 m/s and a height of 200 km above Earth's surface . The satellite experiences an acceleration due to gravity of 9.8m/s2
0m/s2
less than 9.8 but greater than zero
39m/s2
Please give full explanation

This is important 1. what happens to the speed of molecules in water vapor when it condenses to form a liquid? (2 points) the molecules slow down. the molecules speed up. the molecules slow down and then speed up. the molecules speed up and then slow down. 2. how might human activities change to compensate for a decrease in water supplies? (2 points) humans might build a factory. humans might build drainage systems. humans might extract more water from the ground. human behavior does not change because of the water cycle. i'll be grateful if anyone can answer these 2 questions !