Very basic physics.
the foam of the ball
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No, it would bounce better on warm days because heat makes things exspand and cold makes thing shrink
cement
Probably bad shocks.
A basketball will typically bounce higher than a baseball or soccer ball due to its higher air pressure and elastic properties of its material. However, factors such as the surface on which they bounce and the force with which they are dropped can also affect the height of the bounce.
A softball!
18 feet.
metal
It's suspension in the forks and or rear of the bike.
its all inside the ball
it depends if the softball is heavier than the baketball then no it will bounce lower. If a basketball is heavier than a softball it will bounce higher because of gravity