Think of our milky way galaxy as a flat disk of diameter 100,000 light-years. suppose we are one of 1000 civilizations, randomly distributed through the disk, interested in communicating via radio waves. how far away would the nearest such civilization be from us (on average)?

the gas collects in coils that then becomes a liquid that then flows through the coils inside the refrigerator

when two balls of the different masses are dropped from equal height, they reach the ground at the same time .this is because they experience the same acceleration.

the acceleration is independent of mass.

thus when they are dropped they will always maintain the same velocity and travel the same distance (neglect air resistance of course) at the same time.