What is a ball used for?

It is used in ball games, where the play of the game follows the state of the ball as it is hit, kicked or thrown by players. Balls can also be used for simpler activities, such as catch or juggling. Balls made from hard-wearing materials are used in engineering applications to provide very low friction bearings, known as ball bearings.

What is a prediction based on?

A prediction ( Latin præ-, "before," and dicere, "to say"), or forecast, is a statement about a future event or data. They are often, but not always, based upon experience or knowledge. There is no universal agreement about the exact difference from "estimation"; different authors and disciplines ascribe different connotations .

What is a spherical ball?

ball1 / (bɔːl)/ noun a spherical or nearly spherical body or mass: a ball of wool a round or roundish body, either solid or hollow, of a size and composition suitable for any of various games: football, golf, billiards, etc a ball propelled in a particular way in a sport: a high ball any of various rudimentary games with a ball: to play ball

What does it mean if the ball is in your court?

If the ball is in your court, you are the person who is expected or required to do something. What do you think we should do now? The ball is in your court. She's waiting for the ball to be in her court. I stood up quickly and balled my hands into fists. He balled the letter in his hands and threw it in the trash.