Question no-49..

uE VWGUEI SU Suria ce in a Contail a container, The work needed to decrease this coverage by 1 cm2 is 25.0x 10-7 J. The surface tension (in N/m) of the film is (Round off to three decimal places) (Surface tension of pure water is 0.072 N/m) The longest wavelength of light absorbed by a hydrogen-like atom is 2.48 nm. The nuclear charge (Z) of the atom is (Rydberg constant R 109700 cm-1) 49 (Round off to nearest integer) 50. The value of 'n in (P.O] is