Plastic can be advantageous or disadvantage to human discuss that statement using examples of plastic used in human life?

Why does the earth spin slowly, not faster? is it possible to prove it scientifically? can you prove it with math?

What has a person lost function of if they're suffering from carpal tunnel syndrome

There are two tomato plantlets one of them is kept in an oxygen chamber with a light source and another is kept in sunlight. both of them are watered regularly what will be the observation after two weeks