the buildings where made out of bricks
the buildings where made out of bricks
now rubber
Yes, of course. The material a tennis ball is made out of is porrus. That is why tennis balls go flat.
fabric
They build the tennis ball around the air, really! Actually, the tennis ball is made in two halves and then heat wielded together to form the finished ball.
A tennis ball has more mass than a styrofoam ball. Tennis balls are typically made of rubber and have a greater density compared to styrofoam, which is a lightweight material.
dog food
Some special rules made in tennis is that if the ball bounces on your box you will be out.
no, it will burn. it will only explode if it has been made into a "tennis ball bomb" (filled with tips of matches)
There is no evidence of a ball been made from polyurethane. There are polyurethane foam balls, but unfortunately no tennis balls. The process is likely to be the same as a normal tennis ball, the only difference being that the rubber in the ball is replaced by polyurethane.
An authorised table tennis ball is usually made of celluloid but it can also be made of similar plastics.