Answer:
The two basic units of weight in the metric system is the?
The gram and kilogram is the Correct Answer...
Answer:<span>Humid air is lighter, so it has lower pressure.
The reason is the molecules of water are H2O, whose molar mass is 18 g/mol.
These molecules displaces molecules of N2 and O2, whose molar masses are:
N2: 2*14g/mol = 28 g/mol, and
O2: 2*16g/mol = 32 g/mol.
Then molecules of 28g/mol and 32 g/mol are being replaced with molecules of 18g/mol, leading to a lower weight of the same volume of air, which results in lower pressure.
</span>
<span>Velocity, you divide distance/time </span>
Ground water keept the ground at a stable level when it is gone the cavern it was in has no support and is at risk of callaps
