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Hey there!
This is a good example of the Social Contract.
Let me know if this helps :)
Answer:
Say you had Hydrochloric Acid. This is a very strong acid that can burn you. If you didn't know the pH that said it was an acid (1-7), then it could really hurt you.
Or if you had 3 cups either one of them had bleach, water, and a strong acid. You shouldn't pick one, becuase you could die. Bleach is a base, it has a pH of about 12. Water is neutral and has a pH of 7. But the strong acid could have a pH of 3.
Pelé announced his retirement from soccer in 1974, but he was lured back to the field the following year to play for the New York Cosmos in the North American Soccer League, and temporarily helped make the NASL a big attraction.
