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There are two reasons for this: * Firstly, a spherical ball will bounce more predictably. Some games use non-spherical balls (such as American Football or Rugby) and part of the game is the non-predictability of the bounce. * The other thing is that if you inflate anything it will tend to form a sphere; with a sphere the pressure inside the ball is equal throughout the inside of the ball - this is why when bubbles are blown, the are always spheres. It isn't that a ball is round. It's that we call a round thing a ball (or sphere).
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List of 50 round things?
oranges, Earth, Grapefruit, baseballs, soccer balls,beach ball,marbles,tires, apples, ball, spears, 39 straws.
What is is a counterexample for all balls are spheres?
American footballs and Rugby balls are both considered 'balls' but neither are spheres.
How many balls are in 1 gross of ping pong balls?
about 144 ping pong balls are in a gross.
What is the probability of choosing 3 red balls and 2 black balls out of a bag which contains 5 red balls 2 green balls and 4 black balls?
If you draw enough balls, without replacement, the probability is 1.The answer depends onhow many balls are drawn, andwhether or not they are replaced.Unfortunately, your question gives no information on these matters.
There are 30 balls out of which 60percent are green balls and rest are blue balls How many ways that you can pick the pair of blue balls?
There are 18 Green balls and 12 Blue balls. You have to pick 2 blue balls, so the green balls don't matter. You can pick 1 blue ball on 12 ways. The second ball you can pick on 11 ways (because there are 11 balls left). 12 * 11 = 132. So you can pick it on 132 ways. ;)
