What device is used to measure atmospheric pressure

What is the temperature of one mole of helium gas at stp?

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?

Apush or pull that moves or changes and object when to objects touch