A space ship has a mass of 9000 kg. The space ship is launched from earth and lands on a distant planet where it has a weight of 390000 N. What is the acceleration of gravity on this planet? the photo shows what needs to be answered

Hydrogen atoms are excited by a laser to the =4n=4 state and then allowed to emit. what is the maximum number of distinct emission spectral lines (lines of different wavelengths) that can be observed from this system? 8 6 2 7 4 5 1 3 calculate the wavelength of the 4⟶14⟶1 transition. =λ=