The heavy ball will fall first than the lighter one only if there is air resistance. In a vacuum, both the objects will fall at the same time. In practical conditions, there will be an air resistance and hence the tennis ball will fall first. The foremost example of this concept is the Feather Vs … Read more

It is an 18th century betting system. The simplest of these strategies was designed for a game in which the gambler wins his stake if a coin comes up heads and loses it if the coin comes up tails. The strategy had the gambler double his bet after every loss, so that the first win … Read more