Each of the 20 people has 19 other people to communicate to. If you add that all up you get 20*19 paths, but then each path is counted twice (back and forth), so we divide this by 2. 20*19/2 = 190.
The general forumula is n(n-1)/2
The overall kinetic energy of the 60mph car is greater than the overall kinetic energy of the 30mph car. Because of this, it takes a greater force to stop the faster car because it has greater amount of kinetic energy (aka the amount of force needed to overcome the momentum of the faster car is larger).
Answer:
The answer is cross-site scripting(XSS)attack.
Explanation:
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text effects, and typography.
