Create an analogy for the compressibility of a gas compared to a liquid or a solid.

Which is a character of nuclear fusion but not nuclear fission

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?

Classify this reaction: 2al+n2-> aln.