The pen on seismograph swings freely.

What is the number of moles in 15.0 g ash3?

Which process does not require the presence of a physical substance in order to transfer heat? air in the atmosphere is heated by the ground. this warm air then rises, and cooler air falls. this is an example of what type of process? how is conduction different from radiation?

Which electron configuration represents the electrons in an atom of sodium in the ground state at stp