<Table> <Tr> <Td> <P> U (r; R 1, R 2) = − A R 1 R 2 (R 1 + R 2) 6 r (\ displaystyle \ U (r; R_ (1), R_ (2)) = - (\ frac (AR_ (1) R_ (2)) ((R_ (1) + R_ (2)) 6r))) </P> </Td> <Td> <P> </P> <Table> <Tr> <Td> <P> </P> </Td> <Td> <P> </P> </Td> <Td> <P> </P> </Td> </Tr> <Tr> <Td> <P> </P> </Td> </Tr> </Table> </Td> <Td> <P> (2) </P> </Td> </Tr> </Table> <Tr> <Td> <P> U (r; R 1, R 2) = − A R 1 R 2 (R 1 + R 2) 6 r (\ displaystyle \ U (r; R_ (1), R_ (2)) = - (\ frac (AR_ (1) R_ (2)) ((R_ (1) + R_ (2)) 6r))) </P> </Td> <Td> <P> </P> <Table> <Tr> <Td> <P> </P> </Td> <Td> <P> </P> </Td> <Td> <P> </P> </Td> </Tr> <Tr> <Td> <P> </P> </Td> </Tr> </Table> </Td> <Td> <P> (2) </P> </Td> </Tr> <P> U (r; R 1, R 2) = − A R 1 R 2 (R 1 + R 2) 6 r (\ displaystyle \ U (r; R_ (1), R_ (2)) = - (\ frac (AR_ (1) R_ (2)) ((R_ (1) + R_ (2)) 6r))) </P> <Table> <Tr> <Td> <P> </P> </Td> <Td> <P> </P> </Td> <Td> <P> </P> </Td> </Tr> <Tr> <Td> <P> </P> </Td> </Tr> </Table>

The london van der waals attraction between spherical particles