Larissa volunteers to pick up litter on the weekends to help clean up the environment in her community. One day, at the lake, she finds an empty soda bottle floating on the surface. Then, she finds a full soda bottle that has sunk to the bottom near her feet. Upon examining the bottles, she finds that they are the exact same brand and size. Why did one bottle float while the other one sank?
I found the answer for this, it was the second option (B) aka The bottles had different masses. The full bottle had a higher mass and higher density, so it sank. The empty bottle had a lower mass and lower density, so it floated.