How much salt do the oceans contain

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?

Name the intersection of plane bpq and plane cpq.

What substance has a mass of 9.5g and volume of 2.1cm^3