When you use them, they may start to lose their color from being bounced and thrown around. And they may also start to get flat; also from bouncing. I hope this is what you were looking for :) Hope this helps!
-Kay
To play tennis.
New tennis balls are considered fresh and not "flat". Old tennis balls exposed to play and air become flat and do not perform normally in a match.
6 new balls at each change over.
It didn't exactly change - both white and yellow balls are approved for use by ITF. The currently used colour (fluorescent yellow) was introduced in 1972 because it was better visible on TV sets.
The density of tennis balls is approx. 0,38 g/cm3 an can float on water.
For every tennis match there maybe 60 balls needed
not for puppies, they use them for big dogs, if u want a tennis ball for youre puppy go to a pet store and buy special tennis balls
Yellow tennis balls replaced white tennis balls because the Lawn Tennis Association decided that the white balls were difficult to see. You can still buy white balls nowadays at whitetennisballs.com, which is the leading modern and easiest seller for white tennis balls for sale to reach in America and internationally. According to smithsonianmag.com, the first use of yellow tennis balls was in 1986 to make easier viewing on television. Wilson has always been making the white balls for lawn tennis which can be ordered online occasionally. But before the whitetennisballs.com company started selling in 2007, the white ball market was shut down for decades for most common use and is still quite rare. The only tennis balls that can be used in professional tennis is the neon and white, so it technically hasn't been changed within the rules of tennis.
glass, magnets, Tennis balls & blackboards
Cracked table tennis balls can be used for vehicular antenna-toppers.
you can also use a big rubber ball
tennis balls are furry and raquet balls are not . tennis balls are also bigger.