There are so many Chinese that play ping pong that I think there may be more table tennis balls.
To give them more grip on a tennis raquet
At the Tennis Express stores. They sell racquets, clothes, balls, tennis books, tennis DVDs, sunglasses, bags, and more.
Tennis balls contract when heated which means that it will bounce higher.
New tennis balls bounce higher than old tennis balls because they have more elasticity and air pressure which allows them to compress and decompress more easily upon impact with the ground. As tennis balls are used, the felt covering wears out and the air inside the ball escapes, leading to less bounce.
They improved them a lot! If your question would be more specific, it would be easier to answer. The tennis balls used to be wads of hair or wool wrapped in stuff, but now they are more rubbery for bounce. I don't know exactly how.
It catches more air and allows for curve balls.
Tennis balls bounce because the air pressure inside is higher than the outside pressure. They begin to lose bounce as soon as removed from their pressure can. The alititude where the ball is played will affect the bounce. As they are played, they lose more bounce. Typically, they lose too much bounce to play after about 3 sets of recreational (amateur) tennis, or 8 games of professional tennis.
Because all of the balls on the tennis court were stolen. (It's not in the game any more.) You can play table tennis though.
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.
A bucket of water is heavier than a bucket of tennis balls. This is because water has a higher density than tennis balls, meaning there is more mass packed into a given volume. The weight of an object is determined by both its mass and the gravitational force acting on it, so the bucket of water will weigh more than the bucket of tennis balls when measured on a scale.
Tennis balls bounce higher depending on factors like their internal pressure, felt quality, and core material. New balls with higher pressure and less wear will bounce higher compared to older balls with lower pressure and more wear. The type of surface and conditions where the ball is being used can also affect its bounce height.