On the pH scale 7 is a neutral. Anything below 7 is acidic and anything above 7 is a base.
Answer:
because it is also created from the father not only one of them
It has been estimated that active tobacco smoking causes close to 90% of lung cancer cases and is the cause of 87% of lung cancer deaths.
it's very practical, because it's on base 10, so conversion between stuff like meters to kilometer is always just a multiplication with 10 to some power
like 1 km = 1000m (10³m)
or 1 m = 10^-3km = 0.001km
same reason for other SI units.
except time, that's base 60, or 12, or 24. that's more complicated, but there isn't any real competition
