If Methane (or natural gas) is so good at releasing heat compared to petrol (octane) then why don’t most cars in Australia use it?

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?

Is a pencil falling to the floor anon contact force, a force, or a contact force

Chromosome 17 is made of over million base pairs.