Question

a plasti aplastic cube is released in water will it sink are come to the surface of water

Answer 1

Specific gravity decides whether the plastic will float or sink.

If the water is pure, its specific gravity will be 1.

If the plastic object's specific gravity is more than 1, it will float, otherwise sink.

Structure and material of the plastic also varies.

Additives hamper the specific gravity.

Polystyrene sinks but if it has air bubbles, it will float.

Answer 2

A plastic when releases in water it will come to the surface. Because :

1. Weight of plastic is quite light.

2. They have less density as compared to water.

3. Also, the srinkage or floating depends on buoyancy of water.