Picture a glass of water filled to the top. Inside the glass, there's a coin resting at the bottom. Your challenge is this: Without touching the coin or pouring out any water, can you find a way to make the coin float up to the surface?
Picture a glass of water filled to the top. Inside the glass, there's a coin resting at the bottom. Your challenge is this: Without touching the coin or pouring out any water, can you find a way to make the coin float up to the surface?
