The fabric of the hot air balloon can stretch, but it does not allow air to pass through it. think about the change in air density you expect as the pilot adds hear to the air in the balloon. what change would you expect to see in the fabric of the hot air balloon. explain

Tafari worked one summer on a ship that set weather buoys in the ocean. he watched how one of the buoys moved in the water. describe which parts of the wave would cause the buoy to bob up and down. which wave property determined how fast the buoys bobbed in the water? he observed that when the wind blew harder, the ocean waves were larger, and the buoys moved away from the ship. what effect, if any, did the waves have on how far the buoys moved? explain your answer.

The coefficient of friction is a number that represents the resistance to sliding between two in contact with one another.

Which changes would result in a decrease in the gravitational force btween two objects? check all that apply