<Ul> <Li> Contact mechanics (frictional) </Li> </Ul> <Li> Contact mechanics (frictional) </Li> <Tr> <Td> Fluid mechanics (show) <Table> <Tr> <Th> Fluids </Th> </Tr> <Tr> <Td> <Ul> <Li> Statics Dynamics </Li> <Li> Archimedes' principle Bernoulli's principle </Li> <Li> Navier--Stokes equations </Li> <Li> Poiseuille equation Pascal's law </Li> <Li> Viscosity (Newtonian non-Newtonian) </Li> <Li> Buoyancy Mixing Pressure </Li> </Ul> </Td> </Tr> <Tr> <Th> Liquids </Th> </Tr> <Tr> <Td> <Ul> <Li> Surface tension </Li> <Li> Capillary action </Li> </Ul> </Td> </Tr> <Tr> <Th> Gases </Th> </Tr> <Tr> <Td> <Ul> <Li> Atmosphere </Li> <Li> Boyle's law </Li> <Li> Charles's law </Li> <Li> Gay - Lussac's law </Li> <Li> Combined gas law </Li> </Ul> </Td> </Tr> <Tr> <Th> Plasma </Th> </Tr> </Table> </Td> </Tr> <Table> <Tr> <Th> Fluids </Th> </Tr> <Tr> <Td> <Ul> <Li> Statics Dynamics </Li> <Li> Archimedes' principle Bernoulli's principle </Li> <Li> Navier--Stokes equations </Li> <Li> Poiseuille equation Pascal's law </Li> <Li> Viscosity (Newtonian non-Newtonian) </Li> <Li> Buoyancy Mixing Pressure </Li> </Ul> </Td> </Tr> <Tr> <Th> Liquids </Th> </Tr> <Tr> <Td> <Ul> <Li> Surface tension </Li> <Li> Capillary action </Li> </Ul> </Td> </Tr> <Tr> <Th> Gases </Th> </Tr> <Tr> <Td> <Ul> <Li> Atmosphere </Li> <Li> Boyle's law </Li> <Li> Charles's law </Li> <Li> Gay - Lussac's law </Li> <Li> Combined gas law </Li> </Ul> </Td> </Tr> <Tr> <Th> Plasma </Th> </Tr> </Table>

Who studied the relationship between amount of a gas and its volume