Penny. Put the ball, duck and penny in water. Only the penny sinks.
Depends on the medium, and whether the ball is solid or not. A solid ball would float on mercury, sink in water. If it were hollow enough (or filled with, say, cork) it would float in water.
Depends on how much it weighs, if its hollow then maybe it would float. But doubting it would if its solid.
A beach ball can float on water because it is less dense than the water, due to the air trapped inside the ball. The buoyant force exerted by the water on the beach ball is greater than the force of gravity pulling it down, allowing the ball to float on the surface of the water.
A tennis ball will float in water because it is less dense than water. The air inside the ball helps to keep it buoyant on the surface of the water.
No, plasticine is denser than water, so a plasticine ball will sink in water rather than float.
It would simply float back to the surface!
A penny
Yes, it does, because oil is lighter than water. The ball will sink more in oil than in water.
Float the ball in water and calculate the displacement.
A crushed paper ball will generally float in water due to its low density and air trapped within its fibers. This creates buoyancy, allowing it to remain on the surface of the water.
Yes, half of a tennis ball will float in water because it is less dense than water. The air-filled cavity inside the tennis ball helps it to float.