D is the answer
in V-t graph, tan α= velocity/time=acceleration
20 is the atomic number for Calcium.
The smaller the area the greater the pressure, while the bigger the smaller the pressure. So they are inversely proportional
The ability of the ground water to pass through the pore spaces in the rock is described as the rock's permeability. Permeable layers of rock that store and transport water are called aquifers.
Attractive forces between molecules of the same type are called cohesive forces. ... Attractive forces between molecules of different types are called adhesive forces. Such forces cause liquid drops to cling to window panes, for example.
