Come in different types and vary among ecosystems and are also directly affect how organisms survive

The bond energy for the van der waals bond between two helium atoms is 7.9×10−4ev. assuming that the average kinetic energy of a helium atom is (3/2)kbt, at what temperature is the average kinetic energy equal to the bond energy between two helium atoms

What must occur for air masses to form fronts

What is the molecular weight of copper