You're walking around one sunny day on the north side of the city when you hear what sounds like a thunderstorm. Suddenly, ...

Here's how to get more bounce from a normal tennis ball - buddy it up with a heavier ball for twice the impact. Hold a ball in each hand and decide which ball weighs more (has greater mass).

It’s every child’s dream,” he said ... cannons designed with an engineer’s mindset. The typical bouncy ball, originally made of the synthetic polymer Zectron and marketed under the ...

Modern tennis balls are made of a hollow rubber core, covered in a wool or nylon shell which is known as the nap. Pressurised air inside the rubber core makes the ball bounce. Balls which haven't got ...