A child exerts a force of 12N to shoot a rubber band across the room. If the rubber band has a spring constant of 180N/m, what is the rubber band’s displacement?

The two most prominent wavelengths in the light emitted by a hydrogen discharge lamp are 656(red) and 486 (blue). light from a hydrogen lamp illuminates a diffraction grating with 500 lines per mm, and the light is observed on a screen 1.50 behind the grating. what is the distance between the first-order red and blue fringes?