Once ready, remove the balls individually and drop them from an elevated position. Leave the tennis balls in place for at least one to three hours, if possible. Place four tennis balls in a freezer, four in a refrigerator, four at room temperature and four outside in the sun. Gather 15 to 20 tennis balls and a measuring tape. This scientific mystery can be demonstrated at home or school with a simple experiment. As a result, a cold ball has a much lower bounce. On the other hand, a temperature decrease causes the gas molecules to contract and move around more sluggishly.
This increased energy and movement results in a higher bounce. As the molecules expand, their energy increases as they bounce around more erratically. When the temperature increases, the gas molecules inside the tennis ball expand. If the density and the constant remain the same, a higher temperature results in higher pressure, while a lower temperature results in lower pressure. The scientific equation for determining the pressure of gas is “p=rRT,” where “p” is the pressure, “r” is the density, “R” is a constant specific to the gas and “T” is temperature. The pressure of the gas inside the ball ultimately determines how high the tennis ball will bounce.
As the tennis ball returns to its normal shape, the gas inside the ball acts as a spring and causes the ball to bounce into the air. When a tennis ball hits the ground, the force presses up against the ball, pushing the bottom surface of the ball in and compressing the gas inside its core. As such, gas molecules can easily expand or contract. The molecules that make up gas are relatively unorganized they readily slide around and over one another to fill up any space they occupy.
The anatomy of a tennis ball features a hollow rubber-like core filled with gas.
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