Answer:
Factors that cause population growth include increased food production, improved health care services, immigration and high birth rate. These factors have led to overpopulation, which has more negative effects than positive impacts. The world population today is over 7 billion and the number is increasing with each passing year.
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As the air molecules move through the valve they have friction as they hit the walls, and its this friction that causes it to heat up.
use a strong base to neutralize, like NaOH, KOH, etc
There is fr-218
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